publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
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2019-08-15 | This paper deals with the characterization of dry sand-rubber tire shred mixtures to find shear strength and dynamic properties. A series of ordinary triaxial shear tests, direct shear tests and dynamic triaxial tests were performed on dense dry sand-rubber tire shred mixtures for various rubber replacement levels such... | Factors Affecting Strength and Stiffness of Dry Sand-Rubber Tire Shred Mixtures | 10.1007/s10706-018-00792-y |
2019-08-15 | This paper presents a detailed analysis of squeeze film air damping effects on dynamic responses of RF-MEMS switches under varying environmental conditions, etch holes’ configuration and air gap thickness values. The effect operating conditions like air pressure, temperature and humidity on the closing time of RF-MEMS ... | Effect of environmental conditions and geometric parameters on the squeeze film damping in RF-MEMS switches | 10.1007/s10470-018-1283-5 |
2019-08-06 | As the rheology of a magneto-rheological (MR) fluid can be controlled by an externally applied magnetic field, the damping force generated by a MR damper can be controlled by varying the current supplied to an electromagnet inside the damper. This paper presents the experimental evaluation of such a MR damper RD-8040-1... | Evaluation of a commercial MR damper for application in semi-active suspension | 10.1007/s42452-019-1026-y |
2019-08-06 | After the Northridge and Kobe earthquakes, several destruction of the structural beams were occurred. The difficulty and cost-effectiveness of beam replacement after earthquakes is a major problem on steel structures. For this purpose, the idea of using replaceable connection is suggested. A slit steel damper (SSD) is ... | Design of Optimal Slit Steel Damper Under Cyclic Loading for Special Moment Frame by Cuckoo Search | 10.1007/s13296-019-00206-6 |
2019-08-05 | Abstract The objective of this research work is to investigate the effect of multiwall carbon nanotube (MWCNT) content (0.3–1.2 wt%) on a potassium sodium niobate (KNN)-based piezoelectric unimorph harvester for enhancing the energy generation capacity. KNN–MWCNT composites were fabricated by using a microwave solid st... | Energy-harvesting enhancement in composites of microwave-exfoliated KNN and multiwall carbon nanotubes | 10.1007/s12034-019-1938-6 |
2019-08-05 | In this paper, we aim to obtain the existence of at least three classical solutions for nonlinear impulsive problems neither adding superlinear or local sublinear conditions to nonlinear term at zero nor adding superlinear assumptions to nonlinear term at infinity. Our approach relies on variational methods, more speci... | Triple solutions for a damped impulsive differential equation | 10.1186/s13662-019-2269-z |
2019-08-01 | Experiments show a strong increase in damping with the vibration amplitude during nonlinear vibrations of beams, plates and shells. This is observed for large size structures but also for micro- and nanodevices. The present study derives nonlinear damping from viscoelasticity by using a single-degree-of-freedom model o... | Derivation of nonlinear damping from viscoelasticity in case of nonlinear vibrations | 10.1007/s11071-018-4312-0 |
2019-08-01 | We study uniform stabilization and the continuous dependence of solutions to an initial and boundary value problem for a nonlinear hyperbolic equation with (possibly strong) linear damping. | Energy Decay and Continuous Dependence for Damped Semilinear Wave Equation | 10.1007/s40995-017-0471-y |
2019-08-01 | A variable air volume (VAV) air handling system can significantly reduce fan power under partial load conditions. The focus of this study is developing a modeling program to predict the potential energy saving by the secondary HVAC system strategies. Comprehensive steady-state models are established to describe the ene... | Energy and economic analysis of model-based air dampers strategies on a VAV system | 10.1007/s13762-018-1863-z |
2019-08-01 | In this paper, for the high frequency part of the solution u ( x , t ) to the linear fractional damped wave equation, we derive asymptotic-in-time linear estimates in Triebel-Lizorkin spaces. Thus we obtain long time decay estimates in real Hardy spaces H ^p for u ( x , t ). The obtained results are natural extension o... | Estimates of Damped Fractional Wave Equations | 10.1515/fca-2019-0053 |
2019-08-01 | Semi-active suspension control with magnetorheological (MR) damper is one of the fascinating systems being studied in improving the vehicle dynamics. By using the MR damper system, a controllable system can be produced dynamically and the majority of the performance of a fully active system can potentially be achieved.... | Fuzzy logic with a novel advanced firefly algorithm and sensitivity analysis for semi-active suspension system using magneto-rheological damper | 10.1007/s12652-018-1044-4 |
2019-08-01 | The authors provide an estimation of the “wall viscosity” and its increment (“magneto-viscous” effect) in a thin near-wall layer of a column of magnetic fluid oscillating in the tube when a strong transverse magnetic field is applied. The calculation is performed according to the formula obtained on the basis of two di... | “Wall Viscosity” of Magnetic Fluid Oscillations in a Strong Magnetic Field | 10.1007/s11182-019-01751-7 |
2019-08-01 | The mathematical model based on the Volume-Averaged/Reynolds-Averaged Navier—Stokes (VARANS) equations has been adopted in recent years to generally simulate the interaction between waves and porous structures. However, it is still hard to determine the two experimental coefficients ( α and β ) included in VARANS equat... | Investigation on A Resistance-Type Porosity Model and the Experimental Coefficients | 10.1007/s13344-019-0044-2 |
2019-08-01 | This study proposes a frequency domain vehicle-track coupling model for the CRTS (China railways track system)-III type damping track system based on the two-dimensional vehicle-track-viaduct coupling model, and utilizes dynamic compliance method to determine the dynamic compliance for the vehicle and track systems. Th... | Noise and Vibration Mitigation Performance of Damping Pad under CRTS-III Ballastless Track in High Speed Rail Viaduct | 10.1007/s12205-019-1947-4 |
2019-08-01 | This paper investigates a hybrid structural control system using tuned liquid dampers (TLDs) and lead-rubber bearing (LRB) systems for mitigating earthquake-induced vibrations. Furthermore, a new approach for taking into account the uncertainties associated with the steel shear buildings is proposed. In the proposed ap... | A combined control strategy using tuned liquid dampers to reduce displacement demands of base-isolated structures: a probabilistic approach | 10.1007/s11709-019-0524-8 |
2019-07-24 | The smart behavior of magneto-rheological (MR) fluid is used in the present work in designing, experimentally characterizing and analyzing a MR damper for automotive application using the twin-tube damper concept. A commercially available passive damper of a passenger van was tested to find the characteristic damping r... | Design and experimental characterization of a twin-tube MR damper for a passenger van | 10.1007/s40430-019-1833-5 |
2019-07-17 | In this article, we investigate a system of two viscoelastic equations with Dirichlet boundary conditions. Under some suitable assumptions on the function g i ( ⋅ ) $g_{i}(\cdot )$ , f i ( ⋅ , ⋅ ) $f_{i}(\cdot ,\cdot )$ ( i = 1 , 2 $i=1,2$ ) and the initial data, we obtain general and optimal decay results. Moreover, f... | On decay and blow-up of solutions for a system of viscoelastic equations with weak damping and source terms | 10.1186/s13660-019-2155-y |
2019-07-16 | Mechanical damping caused by frequency, confining stress, and deformation is measured that is strongly dependent on fluid flow in partially saturated sandstone. This effect is observed as a function of frequency, stress amplitude, confining pressure, strain amplitude, and moisture content. The damping peak in response ... | Laboratory measurements of the mechanical damping capacities in partially saturated sandstone | 10.1007/s12517-019-4625-4 |
2019-07-15 | Intermediate isolation system (IIS) is currently spreading and gaining significant popularity, mainly in Japan. However, its potentials are not so well-known in European countries, and in USA only one application to building retrofit is registered. The dynamic behaviour of intermediate isolation systems, more complex t... | Vibration characteristics and higher mode coupling in intermediate isolation systems (IIS): a parametric analysis | 10.1007/s10518-019-00637-w |
2019-07-15 | In this paper, we consider a one-dimensional porous system damped with a single weakly nonlinear feedback. Without imposing any restrictive growth assumption near the origin on the damping term, we establish an explicit and general decay rate, using a multiplier method and some properties of convex functions in case of... | A General Decay for a Weakly Nonlinearly Damped Porous System | 10.1007/s10883-018-9407-x |
2019-07-15 | Leakage of agricultural pipes has been increasingly frequent problems due to corrosion, loosening of joints, and cracks, which result in the subsidence of peripheral roads and dwelling land in the worst case. Generally, leakage has been detected by listening for noisy leak signals or measuring water loss during 24 h in... | Leak detection by monitoring pressure to preserve integrity of agricultural pipe | 10.1007/s10333-019-00730-5 |
2019-07-15 | Yaw damper, widely employed in high-speed railway vehicles, has played an important role in improving the hunting stability. This paper mainly makes a comprehensive analysis on the effect of yaw damper with its series stiffness value on the stability and bifurcation type of the railway bogie. With the prerequisite of t... | Bifurcation analysis of railway bogie with yaw damper | 10.1007/s00419-018-1475-6 |
2019-07-08 | In his classic work Hydrodynamics, Horace Lamb devoted a significant amount of effort to the mathematical analysis of atmospheric waves, i.e. waves in a compressible medium under the influence of a local gravitational field and a variable temperature (and hence sound speed) profile. In so doing, he derived equations fo... | The asymptotic solution of the ion-damped acoustic-gravity wave equation | 10.1007/s00033-019-1163-6 |
2019-07-01 | Motor drivers employ film capacitors instead of the conventional electrolytic capacitors to achieve better reliability and smaller volume. However, these drivers have an instability problem because of a resonance between the small dc-link capacitance and grid side line inductance. In order to solve the problem, this pa... | DC-Link Voltage Stabilization Using d-Axis Current Injection for SPMSM Driver with Small DC-Link Capacitance | 10.1007/s42835-019-00176-z |
2019-07-01 | The study is presented of the aircraft landing gear deformations in the axial direction of the aircraft (gear-walk) under the load from a runway. Some beam-based model is proposed to describe the elastic properties of landing gear and the oleo strut behavior. The primary verification of the model is carried out: The ch... | Numerical Simulation of Planar Oscillations of a Landing Gear Leg along the Longitudinal Axis of an Aircraft During the Landing Impact | 10.1134/S1990478919030013 |
2019-07-01 | Recent studies show an interest on the static and dynamic mechanical properties in applications where both influence the overall performance of mechanical systems. This study explores the impact of the T6 heat treatment in the elastic and damping properties of Al–Si–Mg alloys. Consequently, the role of such properties ... | T6 Heat Treatment Impact on the Random Frequency Vibration Stress of Al–Si–Mg Alloys | 10.1007/s12540-019-00244-z |
2019-07-01 | In this present study, static and dynamic properties of hybrid fiber-reinforced concrete (HFRC) were experimentally investigated. The mechanical properties accompanied by compressive strength, splitting tensile strength and flexural strength were evaluated for several combinations of mixtures containing hybrid fibers. ... | Experimental and numerical study on damage evaluation of hybrid fiber-reinforced concrete | 10.1007/s42107-019-00141-1 |
2019-07-01 | Tuned liquid damper (TLD) and tuned liquid column damper (TLCD) are two types of passive control devices that are widely used in structural control. In this study, a real-time hybrid simulation (RTHS) technique is employed to investigate the difference in control performance between TLD and TLCD. A series of RTHSs is p... | Control performance comparison between tuned liquid damper and tuned liquid column damper using real-time hybrid simulation | 10.1007/s11803-019-0530-9 |
2019-07-01 | This paper gives several sets of sufficient conditions which guarantee that all radially symmetric solutions of $$\begin{aligned} \text {div}(D(u)\nabla u) + \frac{k(||\mathbf {x}||)}{||\mathbf {x}||}\,\mathbf {x}\cdot (D(u)\nabla u) + \omega ^p|u|^{p-2}u = 0 \end{aligned}$$ div ( D ( u ) ∇ u ) + k ( | | x | | ) | | x ... | Sufficient conditions for convergence of solutions of damped elliptic equations | 10.1007/s00605-018-1192-9 |
2019-07-01 | The dynamics of beams equipped with tuned mass dampers is of considerable interest in engineering applications. Here, the purpose is to introduce a comprehensive framework to address the stochastic response of the system under stationary and non-stationary loads, considering inertia effects along the spring of every tu... | Random vibration mitigation of beams via tuned mass dampers with spring inertia effects | 10.1007/s11012-019-00983-8 |
2019-06-27 | In this paper, we prove the existence of forward discretely self-similar solutions to the MHD equations and the viscoelastic Navier–Stokes equations with damping with large weak $$L^3$$ L 3 initial data. The same proving techniques are also applied to construct self-similar solutions to the MHD equations and the viscoe... | Forward Discretely Self-similar Solutions of the MHD Equations and the Viscoelastic Navier–Stokes Equations with Damping | 10.1007/s00021-019-0443-4 |
2019-06-15 | We consider a fluid–structure interaction system composed by a three-dimensional viscous incompressible fluid and an elastic plate located on the upper part of the fluid boundary. The fluid motion is governed by the Navier–Stokes system whereas we add a damping in the plate equation. We use here Navier-slip boundary co... | On the Existence of Strong Solutions to a Fluid Structure Interaction Problem with Navier Boundary Conditions | 10.1007/s00021-019-0440-7 |
2019-06-15 | In multibody dynamics, the Euler parameters are often used for the numerical simulation of rigid body rotations because they lead to a relatively simple form of the rotation matrix which avoids the evaluation of trigonometric functions and can thus save computational time. The Newmark method and the closely related Hil... | A modified HHT method for the numerical simulation of rigid body rotations with Euler parameters | 10.1007/s11044-019-09672-6 |
2019-06-15 | Despite the effectiveness of carbon fibre reinforced polymers (CFRPs) and steel braces equipped with hysteretic dissipative devices (HYDBs) to improve the seismic performance of r.c. framed structures, the only use of CFRPs may be unsatisfactory for the retrofitting of buildings designed for gravity loads only while HD... | Seismic retrofitting of gravity-loads designed r.c. framed buildings combining CFRP and hysteretic damped braces | 10.1007/s10518-019-00593-5 |
2019-06-15 | The design, principle of operation, and budget of errors of a laser interference oil manometer developed at the Mendeleev All-Russia Research Institute of Metrology (VNIIM) and subsequently incorporated into the State Primary Standard of the unit of pressure GET 101–2011 are described. The results of studies of precisi... | Laser Interference Oil Manometer of State Primary Standard of the Unit of Pressure Get 101–2011 | 10.1007/s11018-019-01604-2 |
2019-06-15 | Soil–structure interaction (SSI) plays an important role in overall structural seismic behavior. However, there is a scarcity of experimental studies evaluating the SSI effects on a full bridge including superstructure, pile foundations and site soil. This paper focused on shaking table investigations on the effects of... | Experimental assessment of soil–structure interaction effects on a super long-span cable-stayed-bridge with pile group foundations | 10.1007/s10518-019-00574-8 |
2019-06-14 | Because of high hinge moment of planar fin in supersonic flow, designers have become more attentive to the grid fin configuration in recent years. One of the disadvantages of the grid fin is its high drag force. Fortunately, this problem could be handled by implementing sweep-back angle. Few studies have been carried o... | Numerical analysis of the effect of sweep-back angle on the stability derivatives of the grid fin | 10.1007/s40430-019-1788-6 |
2019-06-12 | This research work deals with tip vibration control of a Two-Link Flexible manipulator using hybrid control technique. This technique involves the implementation of unconstrained viscoelastic damping layer on the links in conjunction with active damping using piezoelectric sensors and actuators. Mathematical modelling ... | Hybrid vibration control of a Two-Link Flexible manipulator | 10.1007/s42452-019-0691-1 |
2019-06-01 | We improve the preceding results obtained by Ammari and Choulli (J Differ Equ 259(7):3344–3365, 2015 ). They concern the stability issue of the inverse problem that consists in determining the potential and the damping coefficient in a wave equation from an initial-to-boundary operator. We partially modify the argument... | Hölder stability in determining the potential and the damping coefficient in a wave equation | 10.1007/s00028-018-0476-9 |
2019-06-01 | This paper investigates cylindrical samples made of vacuum packed particles. Such structures are composed of granular media placed in a hermetic encapsulation where, in the final stage, a partial vacuum is generated. The main advantage of such a structure is that the underpressure value makes it possible to control the... | Parameter identification of Bouc-Wen model for vacuum packed particles based on genetic algorithm | 10.1016/j.acme.2018.11.002 |
2019-06-01 | Particle damping is a passive control technology with strong nonlinearity whose damping effect is relative to the vibration intensity where a particle damper is installed. Then, seeking the optimal installing location of the particle damper to improve the damping effect and vibration control performance is an important... | Optimizing location of particle damper using principles of gas-solid flow | 10.1007/s12206-019-0506-8 |
2019-06-01 | Micro-cantilevers are very effective and reliable devices for bio-sensing applications. In this work, a novel biosensor based on micro-cantilever array was designed, simulated and optimized for different bio-sensing applications with high sensitivity, high accuracy, high throughput, and high Q factor. A truss structure... | Numerical simulation for sensitivity and accuracy enhancement of micro cantilever-based biosensor employing truss structure | 10.1007/s00542-018-4092-y |
2019-06-01 | Thin flexible parts are widely used in the aerospace industry and require a more precise surface finish. The main problem in achieving high-quality product is the vibration induced during machining of thin-walled parts. Clamping these thin parts or using rigid supports for parts, such as for propeller blades, lead to d... | Non-contact auxiliary fixture for machining stability improvement of thin flexible workpieces using eddy currents | 10.1007/s12008-018-0495-3 |
2019-06-01 | The behaviour of granular soil is mainly dependent upon the nature and arrangement of particles, which in turn affect fabric anisotropy. It has been known for many years that depositional method plays an important role in the results of laboratory testing of granular soils. Despite extensive studies on the dynamic prop... | Influence of Depositional Method on Dynamic Properties of Granular Soil | 10.1007/s40999-019-00412-7 |
2019-06-01 | A sound knowledge of the dynamic properties of soils is needed to solve several geotechnical engineering problems associated with earthquakes. Here we describe a laboratory investigation performed to measure the dynamic properties of the Plaisancian deposit of marls in the Algiers region using cyclic triaxial tests, cy... | Investigation on shear modulus and damping ratio of Algiers marls under cyclic and dynamic loading conditions | 10.1007/s10064-018-1310-x |
2019-06-01 | A two-dimensional numerical Computational Fluid Dynamics (CFD) model is established on the basis of viscous CFD theory to investigate the motion response and power absorption performance of a bottom-hinged flap-type wave energy converter (WEC) under regular wave conditions. The convergence study of mesh size and time s... | Analysis of the Hydrodynamic Performance of an Oyster Wave Energy Converter Using Star-CCM+ | 10.1007/s11804-019-00076-8 |
2019-06-01 | Low-resilience polyurethane foams including several additive constituents were synthesized to improve their vibro-acoustic performances, as well as the thermal insulation. viscoelastic polymer additive can attenuate vibrations and absorb sound energy. the vibro-acoustic properties of two innovative viscoelastic treatme... | Sound proofing and thermal properties of an innovative viscoelastic treatment for the turboprop aircraft fuselage | 10.1007/s13272-018-0326-z |
2019-06-01 | Damping vibration analysis of multi-phase viscoelastic nanocrystalline nanobeams on viscoelastic medium is carried out accounting for nano-grains and nano-voids sizes. For the first time, a contribution of nonlocal, couple stress and surface energy effects is applied for vibration analysis of nanocrystalline nanobeams.... | Damping Vibration Behavior of Viscoelastic Porous Nanocrystalline Nanobeams Incorporating Nonlocal–Couple Stress and Surface Energy Effects | 10.1007/s40997-017-0127-8 |
2019-06-01 | We show that solutions of the periodic KdV equations $$\begin{aligned} u_t+\gamma u +u_{xxx}+uu_x=f, \end{aligned}$$ u t + γ u + u xxx + u u x = f , are asymptotically determined by their values at three points. That is if there exists $$x_1,x_2,x_3$$ x 1 , x 2 , x 3 such that $$0< x_3-x_2<<x_3-x_1<<1$$ 0 < x 3 - x 2 <... | Determining Nodes for the Damped Forced Periodic Korteweg-de Vries Equation | 10.1007/s10884-019-09737-2 |
2019-06-01 | Alloying is a good approach to increasing its strength but leads to a reduction of damping to pure magnesium. Classifying the alloying characteristics of various alloying elements in magnesium alloys and their combined effects on the damping and mechanical properties of magnesium alloys is important. In this paper, the... | Effect of alloying elements on magnesium alloy damping capacities at room temperature | 10.1007/s12613-019-1789-6 |
2019-06-01 | The use of base isolation to protect a structure and its contents from earthquake damage has proven to be an effective anti-seismic strategy during past earthquakes. Modelling of the isolation system is one of the key steps in understanding the response of the structure and more importantly to evaluate the effectivenes... | The effect of damping in isolation system on the performance of base-isolated system | 10.1007/s42464-019-00012-z |
2019-06-01 | Purpose The structure should be retained in elastic range under cyclic loading due to earthquake and this can be achieved by addition of energy dissipators. This work represents the effectiveness of two types of metallic dissipaters (X-plate and accordion damper). Methods In the first part of the study, the behaviour o... | Optimization of Metallic Damper Location for Seismic Response Control | 10.1007/s42417-019-00110-7 |
2019-06-01 | In this study, a new hybrid damper (HD) is introduced that consists of elastomeric layers, which act as a viscoelastic damper (VED), and metallic dampers (MDs). Metallic part is composed of flexural yielding strips. This HD not only removes the limitations of each of these two types of dampers, but also facilitates its... | A new hybrid energy dissipation system with viscoelastic and flexural yielding strips dampers for multi-level vibration control | 10.1016/j.acme.2018.12.005 |
2019-05-24 | In this work, we study the asymptotic behavior of a system of two-coupled plate equations where one of these equations is conservative and the other one has dissipative properties. The dissipative mechanism is given by the fractional damping $$(-\Delta )^{\theta }v_t$$ ( - Δ ) θ v t where $$\theta $$ θ lies in the inte... | Exact decay rates for coupled plates with partial fractional damping | 10.1007/s00033-019-1135-x |
2019-05-19 | Due to the increasing esthetic requirements and complex functional specifications of machined components, peripheral milling of curved geometries is becoming increasingly important in the aerospace, automotive, and the injection molds industries. However, one of the major difficulties encountered by manufacturers is th... | Modeling of cutting forces in curvilinear peripheral milling process | 10.1007/s00170-018-03249-x |
2019-05-16 | In this article, we study the existence of mild solutions for damped elastic systems in Banach spaces. The discussion is based on the operator semigroup theory and fixed point theorem. In addition, two examples are given to illustrate our results. | Existence of solutions for damped elastic systems in Banach spaces | 10.1186/s13662-019-2130-4 |
2019-05-15 | In this paper, we investigate the effect of the filter for the hyperbolic moment equations (HME) (Cai et al. in Commun Pure Appl Math 67(3):464–518, 2014 ; Cai et al. in SIAM J Sci Comput 35(6):A2807–A2831, 2013 ) of the Vlasov–Poisson equations and propose a novel quasi time-consistent filter to suppress the numerical... | Filtered Hyperbolic Moment Method for the Vlasov Equation | 10.1007/s10915-018-0882-8 |
2019-05-15 | In the framework of seismic design of structures, response spectrum analysis (RSA) is the most commonly used approach in practice. The most popular combination rule is the complete quadratic combination (CQC) which is also prescribed by the most of seismic design codes and is based on the assumptions that the seismic a... | Response spectrum analysis of frame structures: reliability-based comparison between complete quadratic combination and damping-adjusted combination | 10.1007/s10518-019-00559-7 |
2019-05-06 | In this manuscript, we study the coherent single-excitation energy transfer for a dimer system consisting of a donor and an acceptor modeled by two-level systems (TLSs), which are immersed in common thermal environment. We illustrate the effects of the distance between TLSs and temperature of the thermal reservoir on t... | Energy transfer, correlations and decoherence in a dimer in terms of the two-level atomic distances | 10.1007/s11128-019-2276-8 |
2019-05-01 | This paper is a small review devoted to the dynamics of a point on a paraboloid. Specifically, it is concerned with the motion both under the action of a gravitational field and without it. It is assumed that the paraboloid can rotate about a vertical axis with constant angular velocity. The paper includes both well-kn... | A Parabolic Chaplygin Pendulum and a Paul Trap: Nonintegrability, Stability, and Boundedness | 10.1134/S1560354719030067 |
2019-05-01 | A particular hydro-elastic model is considered to examine a radiation problem involving an immersed sphere in an infinitely extended ice-covered sea, where the lower surface is enveloped by a flexible base surface. Both the flexible base surface and floating ice-plate are modelled as thin elastic plates with different ... | Effects of flexible bottom on radiation of water waves by a sphere submerged beneath an ice-cover | 10.1007/s11012-019-00998-1 |
2019-05-01 | The single-degree-of-freedom linear oscillator (LO) under the action of harmonic forcing is coupled to a light attachment that acts, in essence, as a nonlinear energy sink (NES). The complex dynamics of this two-degree-of-freedom system is investigated. Strong stiffness and damping nonlinearity in this system is introd... | A new way to introduce geometrically nonlinear stiffness and damping with an application to vibration suppression | 10.1007/s11071-019-04886-x |
2019-05-01 | High-damping rubber (HDR) has been commonly used to dissipate cyclic energy and reduce the bumping effect of a building structure. Studies on the application of HDR in precast reinforced concrete structures have mainly focused on the effects caused by lateral cyclic loads, but joints in precast structures are also high... | Vertical Cyclic Performance of Precast Frame with Hook-end U-shaped High-damping Rubber Joint | 10.1007/s12205-019-1115-x |
2019-05-01 | The potential of antagonistic bacteria isolated from tomato rhizosphere soils of Oman in the control of damping-off disease of tomato was investigated. A total of 27 bacterial isolates were isolated from 18 soil samples collected from the rhizosphere of tomato from Al-Batinah South, Al-Sharqia North and Muscat Governor... | Biological control of damping-off of tomato caused by Pythium aphanidermatum by using native antagonistic rhizobacteria isolated from Omani soil | 10.1007/s42161-018-0184-x |
2019-05-01 | We analyze the dynamic characteristics of layered plates formed by rigid outer layers and inner layers with magneto-rheological properties. We estimate the influence of magnetic field on the frequency and loss factor for different magneto-rheological and rigid outer layers of materials. The applied improved theoretical... | Evaluation of the Dynamic Characteristics of Beams with Magneto-Rheological Interlayers | 10.1007/s11003-019-00275-2 |
2019-05-01 | To obtain more precise and rational calculation details of the loss and heat of a damper winding in a tubular hydro-generator, this study develops a three-dimensional, finite-element, electromagnetic-temperature field close-coupling model of the damper winding. On the basis of multi-physical field coupled theory, the m... | 3D Electromagnetic-Temperature Field Close-Coupling Calculation of Losses and Heat in the Damper Winding of a Large Tubular Hydro-Generator | 10.1007/s42835-019-00143-8 |
2019-05-01 | Predicting Arctic sea ice extent is a notoriously difficult forecasting problem, even for lead times as short as one month. Motivated by Arctic intraannual variability phenomena such as reemergence of sea surface temperature and sea ice anomalies, we use a prediction approach for sea ice anomalies based on analog forec... | Predicting regional and pan-Arctic sea ice anomalies with kernel analog forecasting | 10.1007/s00382-018-4459-x |
2019-04-30 | The static and dynamic mechanical properties of polymeric materials can greatly be enhanced by using carbon nanotubes as reinforcement material. However, studies still need to be carried out to characterize the dynamic mechanical properties of the Carbon-Nanotube-Reinforced-Polymer (CNRP) material. Experimental investi... | Enhancement of stiffness and dynamic mechanical properties of polymers using single-walled-carbon-nanotube – a multiscale finite element formulation study | 10.1007/s10965-019-1774-9 |
2019-04-16 | This paper is concerned with the initial value problem for semilinear wave equation with structural damping $$u_{tt}+(-\Delta )^{\sigma }u_t -\Delta u =f(u)$$ u tt + ( - Δ ) σ u t - Δ u = f ( u ) , where $$\sigma \in (0,\frac{1}{2})$$ σ ∈ ( 0 , 1 2 ) and $$f(u) \sim |u|^p$$ f ( u ) ∼ | u | p or $$u |u|^{p-1}$$ u | u | ... | Asymptotic profile of solutions for semilinear wave equations with structural damping | 10.1007/s00030-019-0562-x |
2019-04-16 | We consider the stability of a system of two strongly coupled wave equations by means of only one boundary feedback. We show that the stability of the system depends in a very complex way on all of the involved factors such as the type of coupling, the hidden regularity and the accordance of boundary conditions. We fir... | On the sensitivity of the transmission of boundary dissipation for strongly coupled and indirectly damped systems of wave equations | 10.1007/s00033-019-1110-6 |
2019-04-15 | We investigate the dynamics of the Vlasov-Poisson system in the presence of radiation damping. A propagation result for velocity moments of order k > 3 $k>3$ is established in (Kunze and Rendall in Ann. Henri Poincaré 2:857–886, 2001 ). In this paper, we prove existence of global solutions propagating velocity and velo... | Moment Propagation of the Vlasov-Poisson System with a Radiation Term | 10.1007/s10440-018-0200-3 |
2019-04-15 | In this paper, we consider an abstract viscoelastic equation. We use memory-type damping with a general assumption on the relaxation function and establish explicit energy decay result from which we can recover the optimal exponential and polynomial rates. Our result generalizes the earlier related results in the liter... | Asymptotic Stability for the Second Order Evolution Equation with Memory | 10.1007/s10883-018-9410-2 |
2019-04-15 | The integrated optimization of component layout and structural topology is studied in this paper to improve the dynamic performance of the multi-component structure systems under harmonic base acceleration excitations. Considering linear systems, including multi-point constraints interconnecting the components and stru... | Integrated layout and topology optimization design of multi-component systems under harmonic base acceleration excitations | 10.1007/s00158-019-02200-2 |
2019-04-15 | Background This study explored the role of outdoor air pollution [nitrogen dioxide (NO_2) and sulphur dioxide (SO_2)] and indoor air quality (measured with damp or condensation and secondhand smoke exposures) at age 9 months in emotional, conduct and hyperactivity problems at age 3 years. Method Data from 11,625 Millen... | The quality of air outside and inside the home: associations with emotional and behavioural problem scores in early childhood | 10.1186/s12889-019-6733-1 |
2019-04-13 | Circulating tumor cell (CTC) isolation has made positive impacts on metastatic detection and therapy analysis for cancer patients. Microfluidic-elasto-filtration (MEF) device based on the critical elasto-capillary number ( Ca _ e ^* ) has been proposed to utilize the optimal multi-parameter conditions, including cell d... | A nonlinear two-degree-of-freedom mass–damper–spring model to predict the isolation of circulating tumor cells in microfluidic-elasto-filtration devices | 10.1007/s10404-019-2240-z |
2019-04-08 | The most commonly used base isolator is the lead rubber bearing which is used in the experiments carried out in the present study. The performance of this isolator is then studied in an attempt to develop one with a better performance. In the model, thus, developed, hereafter called the ‘Ring Rubber Bearing’, the lead ... | An innovative base isolator with steel rings and a rubber core | 10.1007/s42107-018-00107-9 |
2019-04-06 | Recent years have witnessed the development of so-called relaxation tribometers, the free oscillation of which is altered by the presence of frictional stresses within the contact. So far, analysis of such oscillations has been restricted to the shape of their decaying envelope, to identify in particular solid or visco... | Relaxation Tribometry: A Generic Method to Identify the Nature of Contact Forces | 10.1007/s11249-019-1168-5 |
2019-04-06 | In internal turning operation of long holes, the tool is not rigid, since it must be out from the lathe turret in a length longer than the machined hole length. This problem is even more serious in the internal turning of hardened steels, where the requirements for surface quality are more restrict, due to the fact tha... | Evaluating the use of a new type of impact damper for internal turning tool bar in deep holes | 10.1007/s00170-018-3039-x |
2019-04-05 | In this study, the behaviour of conventional concrete tapered piles subjected to lateral harmonic excitation is assessed. For a constant volume of pile material, the tapered pile is modelled in two different series. The first series is modelled with a constant pile tip diameter and the second series comprises of consta... | Behaviour of tapered piles subjected to lateral harmonic loading | 10.1007/s41062-019-0211-6 |
2019-04-05 | A lower pad adjustable journal bearing is proposed in this paper. This bearing can adjust the working status of the rotor system by changing the position of the bearing pad and improve the stability of the rotor system. The adjustable bearing structure achieves the function of changing the characteristic parameters of ... | Enhancing the stability of rotating machinery using a lower pad adjustable journal bearing | 10.1007/s42452-019-0419-2 |
2019-04-03 | Concrete dams are one of the most important infrastructures in every country and the seismic safety assessment of them is a major task in dam engineering field. Dam–foundation–reservoir system analysis is a complex interaction problem because this system consists of three domains with different behaviors. For accurate ... | Assessment of Foundation Mass and Earthquake Input Mechanism Effect on Dam–Reservoir–Foundation System Response | 10.1007/s40999-018-0325-9 |
2019-04-01 | Abstract The elastic hysteretic properties of various polymer damping composite materials, namely, a composite material based on a rubber mixture, a rubber fiber composite material, and thermoplastic elastomers, are studied during static and dynamic loading at a load of 20–90 kN and a temperature of 23 and –40°C. The c... | Comparison of the Composite Materials Intended for Damping Elements for the Infrastructure of Rail Transport and Rolling Stock | 10.1134/S0036029519040232 |
2019-04-01 | There have been few experimental and numerical studies on damping effects in fluid-structure interaction (FSI) problems. Therefore, a comprehensive experimental study was conducted to investigate such effects. In experiments, a water column in a container was released and hit a rubber plate. It continued its motion unt... | Numerical and experimental investigation of damping in a dam-break problem with fluid-structure interaction | 10.1631/jzus.A1800520 |
2019-04-01 | An application of electromagnetic devices of the motional type (i.e. eddy-current dampers) to improve the dynamic stability of a cantilever pipe discharging fluid is proposed. When the flow velocity reaches a critical value, this system loses stability through the flutter. A contactless damping device is used. This act... | Semi-active stabilisation of a pipe conveying fluid using eddy-current dampers: state-feedback control design, experimental validation | 10.1007/s11012-019-00988-3 |
2019-04-01 | Gradient methods are popular due to the fact that only gradient of the objective function is required. On the other hand, the methods can be very slow if the objective function is very ill-conditioned. One possible reason for the inefficiency of the gradient methods is that a constant criterion, which aims only at redu... | Gradient method with multiple damping for large-scale unconstrained optimization | 10.1007/s11590-018-1247-9 |
2019-04-01 | Background Despite the increased awareness of vibration control, vibration still causes many problems, such as performance degradation of the equipment and stability violation of flexible structures. In general, the vibration in machines can be caused due to the misalignment, malfunction of mounting parts, changes in t... | Experimental Investigation of Damping Effect in Semi-active Magnetorheological Fluid Sandwich Beam Under Non-Homogeneous Magnetic Field | 10.1007/s42417-019-00093-5 |
2019-04-01 | Thermoelastic damping (TED) is considered to be the main internal energy dissipation mechanism in microresonators, the study of which has become increasingly significant in the design of microresonators with high quality factor. In this paper, the bilayered cantilever, fixed-fixed and fully clamped rectangular micropla... | Analysis of thermoelastic damping in bilayered rectangular microplate resonators with three-dimensional heat conduction | 10.1007/s12206-019-0329-7 |
2019-04-01 | Conveyor surging, a phenomenon in which the conveyor repeatedly moves and stops, causes inconvenience to workers and reduces the quality of manufacturing. It is difficult to anticipate the surging motion because it occurs owing to the combination of several causes such as inertia, friction, and motor power. This paper ... | Methods to Eliminate Surging Motion in a Conveyor System Considering Industrial Case Studies | 10.1007/s12541-019-00042-y |
2019-04-01 | The initial value problem for a damped coupled non-linear Schrödinger system is investigated. Global existence and scattering are proved depending on the size of the damping coefficient. | Damped Non-linear Coupled Schrödinger Equations | 10.1007/s11785-018-0841-2 |
2019-04-01 | Purpose In this paper, Bouc–Wen type magnetorheological fluid damper has been used to monitor the ride quality of a prevailing rail vehicle in lateral vibrations. Methods Modelling of the rail vehicle is done in such a manner that it has an entire 9 degrees of freedom by significant considerations of lateral, roll and ... | Semi-active Control to Reduce Lateral Vibration of Passenger Rail Vehicle Using Disturbance Rejection and Continuous State Damper Controllers | 10.1007/s42417-019-00088-2 |
2019-03-15 | In this work, the damping mechanisms of C5 petroleum resin/chlorinated butyl rubber composites were studied by experimentation, molecular dynamics (MD) simulation, and statistical analysis. At the macro level, damping parameters, including glass transition temperature and effective damping temperature region, loss modu... | Experimental and molecular dynamics simulation study on the damping mechanism of C5 petroleum resin/chlorinated butyl rubber composites | 10.1007/s10853-018-3134-2 |
2019-03-15 | In this paper, we obtain several asymptotic profiles of solutions to the Cauchy problem for structurally damped wave equations $$\partial _{t}^{2} u - \varDelta u + \nu (-\varDelta )^{\sigma } \partial _{t} u=0$$ ∂ t 2 u - Δ u + ν ( - Δ ) σ ∂ t u = 0 , where $$\nu >0$$ ν > 0 and $$0< \sigma \le 1$$ 0 < σ ≤ 1 . Our resu... | Asymptotic Profiles of Solutions for Structural Damped Wave Equations | 10.1007/s10884-019-09731-8 |
2019-03-15 | Purpose Peristaltic pumps (PP) are favored in flow bioreactors for their non-contact sterile design. But they produce pulsatile flow, which is consequential for the cultured cells. A novel pulse damper (PD) is reported for pulsatility elimination. Methods The PD design was implemented to target static pressure pulsatil... | A Novel Pulse Damper for Endothelial Cell Flow Bioreactors | 10.1007/s13239-018-00394-y |
2019-03-15 | In this paper Ikeda’s method for roll damping prediction is revisited and the applicability of the method to modern volume carriers is considered. For volume carriers the hull lift and bilge keel components are the dominating components and the estimation of these components in the original method are benchmarked and s... | Ikeda revisited | 10.1007/s00773-017-0497-z |
2019-03-13 | Modern, low-emission aero-engine concepts, such as, for instance, Ultrahigh-Bypass Ratio (UHBR) designs, claim higher demands on the damping performance of acoustic wall treatment, called liner, installed in the engine. New liner concepts are needed providing a more broadband damping efficiency ranging explicitly to th... | Novel liner concepts | 10.1007/s13272-019-00380-7 |
2019-03-13 | The design of an electric active mass dampers (AMD) system requires the knowledge of the structure properties behavior and the soil where it is installed. These properties must be accurate to ensure the effectiveness of the AMD. In the previous works, the researchers consider that the structure is constructed on fixed-... | LQG vibration control effectiveness of an electric active mass damper considering soil–structure interaction | 10.1007/s40435-018-0428-9 |
2019-03-12 | Damper seals might have a great impact on rotordynamics, but the values of their coefficients are difficult to be determined and have a significant uncertainty. In the present paper, a probabilistic model is proposed to model damper seal coefficients, which are frequency dependent. A stochastic process (frequency index... | Impact of damper seal coefficients uncertainties in rotor dynamics | 10.1007/s40430-019-1652-8 |
2019-03-11 | Control moment gyroscope (CMG) is an ideal device for satellite attitude transformation, which inevitably has micro-vibration in that process, and it will seriously affect the high precision imaging of the satellite. To restrain the interference with micro-vibration caused by CMG, a magnetorheological (MR) damper and i... | Development of a Magnetorheological Damper of the Micro-vibration Using Fuzzy PID Algorithm | 10.1007/s13369-018-3464-z |
2019-03-08 | In this work, we adopt a semi-analytical model to study a capacitive MEMS accelerometer based in silicon (Si). Such model takes into account the thermoelastic stiffness and linear expansion coefficients of anisotropic bulk Si. In addition, an analytical damping model, derived from the Reynolds equation, is incorporated... | MEMS capacitive accelerometer: dynamic sensitivity analysis based on analytical squeeze film damping and mechanical thermoelasticity approaches | 10.1007/s42452-019-0327-5 |
2019-03-04 | Based on the properties of nonlocal fractional calculus generated by conformable derivatives, we establish some sufficient conditions for oscillation of all solutions for fractional differential equations with damping term. Forced oscillation of conformable differential equations in the frame of Riemann, as well as of ... | Forced oscillation of fractional differential equations via conformable derivatives with damping term | 10.1186/s13661-019-1162-8 |
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