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2021-01-01 | The feature of the special topics is that the design diagram of the structure differs from the corresponding design diagram used in the classical course of structural mechanics. Introduction of additional assumptions that do not contradict the assumptions of the classical theory of structures leads to a new mathematica... | Special Topics of Structural Dynamics | 10.1007/978-3-030-44394-8_18 |
2021-01-01 | Squeeze film dampers (SFDs) have become very essential for high-speed turbomachinery as means of vibration energy dissipating mechanism. However, SFDs are not very common for inter-shaft bearing applications and are still in the R&D phase. It is observed that the application of SFDs for inter-shaft bearing systems is n... | Feasibility Studies on Newly Conceptualized Inter-shaft Squeeze Film Damper (ISSFD) Rings for Vibration Attenuation | 10.1007/978-981-15-5701-9_22 |
2021-01-01 | Although chronobiologists have postulated self-sustainability in circadian clocks, we report here two examples of damped oscillation in the cyanobacterial circadian system. First, low temperature transformed the self-sustained KaiC phosphorylation rhythm into damped oscillations. Second, deletion of the kaiA gene showe... | Damped Oscillation in the Cyanobacterial Clock System | 10.1007/978-3-030-72158-9_12 |
2021-01-01 | High-speed turbomachinery designs rely on adequate damping at the bearing supports to provide smooth operation throughout the sub-idle and normal operating speed ranges. Squeeze film damper (SFD) designs employ a thin oil film between bearing and housing that softens the bearing support and provides increase damping. D... | Characterization of a Squeeze Film Damper for Aircraft Engine Applications | 10.1007/978-981-15-5701-9_23 |
2021-01-01 | We developed a seat suspension for use on earth-moving machines. The suspension’s mechanism consists of a torsion bar that produces non-linear spring characteristics, a magneto-spring, and a free play damper, which acts as a damping element despite having no actual damping force. We installed a structure that absorbs f... | Development of a Suspension Seat Using a Magneto-Spring and Free Play Damper | 10.1007/978-3-030-47618-2_19 |
2021-01-01 | The progress in active constrained-layer damping (ACLD) that has been made over the past years is presented in this paper. These systems are also called hybrid systems. ACLD treatments combine the best features of passive and active control of structural vibrations. Well-established techniques for passive control of st... | Hybrid Vibration Control Systems | 10.1007/978-3-030-75275-0_12 |
2021-01-01 | The article deals with the mathematical model of wheel axle displacement after the end of the vehicle braking process on the uphill in the absence of moving the pneumatic tire contact patch relative to the road surface. The proposed dependencies for determining the coordinate of the wheel axis position and the speed of... | Theoretical Studies of the Rectilinear Motion of the Axis of the Locked Wheel After Braking the Vehicle on the Uphill | 10.1007/978-3-030-58124-4_7 |
2021-01-01 | The unsaturated shear behaviour of soil is governed by the presence of negative pore water pressure or matric suction ( u _ a - u _ w ). Based on the distribution of solid, water and air phases, the soil–water characteristics curve (SWCC) is divided into three zones such as (1) boundary effect zone, (2) transition zone... | Effect of Matric Suction and CSR on Dynamic Response of Expansive Soil | 10.1007/978-981-33-4001-5_10 |
2021-01-01 | This article concerns the oscillatory behavior of solutions to damped second-order linear functional differential equations with a mixed neutral term. The authors present new oscillation criteria that improve and extend some existing ones in the literature. Examples to illustrate the main results are included. | Oscillation of damped second-order linear mixed neutral differential equations | 10.1007/s00605-020-01469-6 |
2021-01-01 | Mechanical flexibility in robot manipulators is due to compliance at the joints and/or distributed deflection of the links. Dynamic models of the two classes of robots with flexible joints or flexible links are presented, together with control laws addressing the motion tasks of regulation to constant equilibrium state... | Flexible Robots | 10.1007/978-3-030-44184-5_176 |
2021-01-01 | As for the dual active bridge (DAB) converter and three-phase inverter based cascaded system, the stability is affected by the interaction between output and input impedance of the two sub-converters. The small-signal models of both DAB and three-phase inverter are firstly derived for stability analysis. Based on the i... | Optimized Coordinated Control of DAB and Three-Phase Inverter Based Cascaded System with Active Damping | 10.1007/978-981-15-9746-6_41 |
2021-01-01 | Engineers have always faced the challenge of solving conflicting objectives such as high stiffness combined with high damping. Structurally optimised components are used, especially by pushing lightweight construction. This design adaptation of component mass and stiffness generally has a negative effect on the dynamic... | Design of a Motorcycle Triple Clamp Optimised for Stiffness and Damping | 10.1007/978-3-662-63143-0_1 |
2021-01-01 | In this study, a dynamic analysis of a circular rigid foundation resting on the soil surface is carried out. An elastic half-space theory is used to compute the response of a circular foundation subjected to a vertical oscillation. The work deals essentially with the effect of Poisson’s ratio μ. Besides, the work aims ... | Mathematical Analysis of Vertical Vibration for Circular Rigid Foundation Resting on Soil Surface | 10.1007/978-981-15-9399-4_27 |
2021-01-01 | The proper modeling of noise control treatments is a key factor for the robustness of the numerical prediction of the sound transmission. Typical acoustic treatments applied in the industry include one or more layers of poroelastic materials. These are particularly challenging to model since they exhibit a complex, hig... | On the Numerical Modeling of Poroelastic Materials in Acoustic Analysis | 10.1007/978-981-15-8049-9_10 |
2021-01-01 | Control processes are responsible for maintenance of the organism’s internal environment (homeostasis) and, therefore, inextricable from the very definition of living matter. Optimal homeostasis involves adaptation and relies on processing of signals from the environment. Signaling and control processes are considered ... | Signaling and Control | 10.1007/978-3-030-79146-9_4 |
2021-01-01 | Abstract Vertical axisymmetric vibrations of a vessel with a liquid, separated by a porous partition, are considered. The damping of vibrations caused by the presence of a porous partition is studied experimentally. The integral value of the reduced damping coefficient of the system is obtained. | Experimental Study of Axisymmetric Vibrations of a Liquid in a Cylindrical Vessel with a Porous Partition | 10.3103/S1068799821010098 |
2021-01-01 | This work presents a characterization of dynamic mechanical properties of composite beams that were 3D-printed using fused filament fabrication. Two materials were used in the manufacturing process: a flexible material was used as filler of the hollow section (FilaFlex—Polyether-Polyurethane elastomer) while polylactic... | Stiffness and Damping Properties of a Composite Beam Design | 10.1007/978-3-030-68277-4_8 |
2021-01-01 | This study aims at developing a systematic approach for designing the control input for an overhead crane. In a previous report, numerical simulations showed that residual vibrations can be suppressed in nonlinear damped systems by eliminating the natural frequency component from the apparent external force, which incl... | Robust Vibration Control of an Overhead Crane by Elimination of the Natural Frequency Component | 10.1007/978-3-030-47618-2_33 |
2021-01-01 | Dynamic properties of sandy soils, viz. shear modulus (G) and damping ratio (D), are the most important properties for designing geotechnical structures that involve dynamic loading of soils and soil–structure interaction. Liquefaction phenomenon is the most common cause of ground failure during earthquake which has pr... | Evaluation of Dynamic Properties and Liquefaction Studies for Sandy Soil—A Case Study | 10.1007/978-981-33-6969-6_10 |
2021-01-01 | The technique of improving damping characteristics by complexing fine particles in a viscoelastic material is well-known; however, the relevant underlying mechanism is not yet established. It was found damping characteristics were improved by compounding the particles from dynamic viscoelasticity test result. Furthermo... | Three-Dimensional Strain Calculation of Rubber Composite with Fiber-Shaped Particles by Feature Point Tracking Using X-Ray Computed Tomography | 10.1007/978-3-030-48153-7_14 |
2021-01-01 | Structural vibration control as a cutting-edge technology comprises of energy dissipation devices to control excessive structural vibration, increases human solace and forestalls catastrophic structural failure due to strong winds and quakes. Bridge subjected to earthquake forces structural elements will be subjected t... | Dynamic Behavior of Base Isolated Howe Bridges-Seismic Resistant | 10.1007/978-981-33-6969-6_27 |
2021-01-01 | Viscoelastic materials are used extensively for vibration isolation of aerospace systems. These materials’ time/frequency dependence leads to isolators with complex stiffness—and while the frequency dependence is tractable in a frequency-domain analysis, many critical simulations must be done in the time domain, where ... | Modeling Viscoelastic Behavior in Transient Analyses | 10.1007/978-3-030-47709-7_8 |
2021-01-01 | In this contribution, a bladed wheel with dry friction couplings in tie bosses between neighbouring blades is studied. Bladed wheel is excited by stator nozzle excitation in addition to aeroelastic self-excitation modelled by Van der Pol model. Two types of self-excitation are studied, the first is dependent on absolut... | Self-excited Vibrations of Bladed Wheel Analytical Model with Nozzle Excitation and Dry Friction Damping | 10.1007/978-981-15-8049-9_21 |
2021-01-01 | In Chaps. 1 – 5 , we assumed a model and then used that model to determine the system response in the time or frequency domain (or both). More often, however, we have an actual dynamic system and would like to build a model that we can use to represent its vibratory behavior in response to some external excitation. For... | Model Development by Modal Analysis | 10.1007/978-3-030-52344-2_6 |
2021-01-01 | The three-dimensional magnetohydrodynamics equation with damping is considered in this paper. Global attractor of the 3D magnetohydrodynamics equations with damping is proved for $$4\le \beta <5$$ 4 ≤ β < 5 with any $$\alpha >0$$ α > 0 . | Attractors of the 3D Magnetohydrodynamics Equations with Damping | 10.1007/s40840-020-00949-0 |
2021-01-01 | The acoustic and vibratory analysis represent an essential research axis in the automotive industry because these phenomena directly affect the appreciation of the customer when using a vehicle. Indeed, the combustion engine represents the main source of mechanical energy but it generates an acyclic torque because of t... | A Framework for the Design of Rotating Multiple Tuned Mass Damper | 10.1007/978-3-030-47717-2_40 |
2021-01-01 | This article intends a hybrid energy-harvesting shock absorber design which comprehends energy harvesting of automobile suspension vibration dissipation. A mathematical model of the energy harvesting prototype is established, and simulation results show that the dissipation energy can be recovered by varying the feed m... | A High-Efficiency Energy Harvesting by Using Hydraulic Electromagnetic Regenerative Shock Absorber | 10.1007/978-3-030-75793-9_28 |
2021-01-01 | The increasing interest in wide-area damping control poses significant challenges for the consistent operation, control and stability of the complete power system. This study investigates various techniques for mitigation of the effect of imperfect communication medium in a wide-area damping control system. The Modelli... | A Comparative Analysis on Wide-Area Power System Control with Mitigation the Effects of an Imperfect Medium | 10.1007/978-981-33-6981-8_13 |
2021-01-01 | Internally, damped shaft–disk system when driven by a non-ideal power source, i.e., limited power source often exhibits complex dynamics. Upon exceeding a critical power input near resonance, the system may contribute to increasing the transverse vibration severely rather than increasing the spin speed. This phenomenon... | Sommerfeld Effect Attenuation Using Switched-Stiffness Method of a Non-ideal Internally Damped Shaft–Disk System with Constant Eccentricity | 10.1007/978-981-15-5701-9_14 |
2021-01-01 | The article is devoted to rejection of unwanted dynamic reactions of flexible structures. The problem of vibrationless movement of an elastic object when natural oscillations are absent and the reaction of the system does not exceed the static reaction is considered. To analyze the oscillations of the system, the maxim... | Computer Modeling of Robust Control of Vibrationless Movement of Multi-mode Flexible Structures | 10.1007/978-981-33-6632-9_13 |
2021-01-01 | Damping capacity is a measure of a material's ability which absorb vibration energy by converting into heat energy. Materials which have high damping ability can suppress excessive vibrations to a reasonable limit. Therefore, this paper investigates the damping characteristics of five indigenous wood species ( Cordia A... | Investigation on Damping Capability of Indigenous Wood Species in Ethiopia | 10.1007/978-3-030-80618-7_22 |
2021-01-01 | This contribution continues ongoing own research on uncertainty quantification in structural vibration isolation in early design stage by various deterministic and non-deterministic approaches. It takes into account one simple structural dynamic system example throughout the investigation: a one mass oscillator subject... | Approach to Assess Basic Deterministic Data and Model Form Uncertaint in Passive and Active Vibration Isolation | 10.1007/978-3-030-77256-7_17 |
2021-01-01 | This work introduces a method for the identification of linear stiffness and viscous damping parameters from a one-degree-of-freedom force-displacement cycle. Using an original approach, the stiffness parameter is derived by a least-square formula from the discrete input force-displacement point coordinates of the loop... | Least-Square Effective Stiffness to be Used for Equivalent Linear Model | 10.1007/978-3-030-73932-4_10 |
2021-01-01 | Self-oscillations under delays in elasticity and damping in a system with an energy source of limited power are considered. The dynamics of the system is described by nonlinear differential equations. The method of direct linearization of non-linearity is used for their solution. It has a number of advantages over the ... | Influence of Delays on Self-oscillations in System with Limited Power-Supply | 10.1007/978-3-030-67133-4_12 |
2021-01-01 | Squeeze film dampers play a vital role in absorbing vibration energy in a rotor bearing system. The damper under study has an elastic ring with pedestals between bearing and stator dividing oil cavity into small oil pockets. This arrangement is different from conventional squeeze film damper where a single annular oil ... | Experimental Evaluation of Elastic Ring Squeeze Film Dampers for Small Gas Turbine Engine | 10.1007/978-981-15-5039-3_31 |
2021-01-01 | The paper presents the free oscillation analysis of the reduced torsional system in the crankshaft of a six-cylinder piston internal combustion engine with a liquid or rubber (internal friction) damper mounted on the toe. Installing a torsional vibration damper on the sock of the crankshaft changes the frequency of fre... | Selection of the Optimum Damping Coefficient for Torsional Vibration Dampers for Crankshafts of Reciprocating Internal Combustion Engine | 10.1007/978-3-030-54814-8_25 |
2021-01-01 | This paper presents the reduction phenomenon of the added damping in a stay cable caused by static wind loads acting on a cable with an external damper. First, an equation of motion of a sagging cable is derived that takes the consideration of dead loads including cable self-weight and static wind loads into account. S... | Effect of Static Wind Loads on Reduction of Damping in a Stay Cable with a Damper | 10.1007/978-981-16-0945-9_7 |
2021-01-01 | In the boring process, tool vibration is an important parameter due to its overhanging length and also leads to high cutting force, poor surface finish and increase in tool wear. To suppress tool vibration and increase the cutting performance, a novel idea has been developed in rheological fluid. In present work, a bor... | Computational Analysis of Boring Tool Holder with Damping Force | 10.1007/978-981-15-4488-0_78 |
2021-01-01 | A review on dynamic properties of soil using cyclic triaxial test has been proposed in the present study. Several researchers have studied the dynamic properties of soil at large strain level using cyclic triaxial test and proposed either analytical solution or charts for shear modulus degradation curve and damping cur... | Cyclic Triaxial Test to Measure Strain-Dependent Dynamic Properties—A Comprehensive Study | 10.1007/978-981-33-6564-3_59 |
2021-01-01 | The hysteretic damping approach is a satisfactory model for granular soils, although some mathematical inconsistencies may be pointed in its formulation. When cohesive saturated soils or soils saturated with high viscosity fluids are subject to dynamic loads, then a second mechanism of energy dissipation may occur with... | Formulation of a Dynamic Damping Equation for Soils in the Light of Poromechanics | 10.1007/978-3-030-64518-2_70 |
2021-01-01 | This paper presents results from experimental testing of a railway bridge. Forced vibration tests was performed using a hydraulic actuator with variable load amplitude. The estimated modal properties show that the increased load amplitude results in lower natural frequency and higher damping, especially for the first m... | Full-Scale Forced Vibration Tests of a Railway Bridge | 10.1007/978-3-030-64690-5_21 |
2021-01-01 | In Chaps. 1 – 5 we discussed the solution of discrete, lumped parameter models. For multiple degree of freedom systems, we employed modal analysis to enable us to transform the coupled equations of motion in local (model) coordinates into modal coordinates. In this coordinate frame, the equations of motion were uncoupl... | Continuous Beam Modeling | 10.1007/978-3-030-52344-2_8 |
2021-01-01 | An application of own algorithm for reduction optimization calculation time is presented in the paper. The algorithm is called Distributed Multi-Population Evolutionary Algorithm and uses a genetic algorithm with real-coded genes in the chromosome. The client-server architecture was used for processing lots of populati... | Increase Driver’s Comfort Using Multi-population Evolutionary Algorithm | 10.1007/978-981-16-1685-3_29 |
2021-01-01 | Base isolators have not been extensively used in Indonesia because they have to be primarily imported from abroad and thus, they need high costs. One of the efforts to reduce the costs of base isolators is the use of local rubber that is totally processed within the country, from harvesting the rubber latex until manuf... | Experimental Study of Two Stages on the Use of Local Rubber as Base Isolator for Dwelling Houses | 10.1007/978-981-33-6311-3_62 |
2021-01-01 | This chapter describes how to begin the task of designing a MEMS device from scratch, an effort that will proceed in parallel with design of other key pieces of the MEMS product system, such as the package and electronics. We describe how to use analytical models to efficiently estimate the design space of a novel devi... | Starting a New MEMS Device Design | 10.1007/978-3-030-61709-7_10 |
2021-01-01 | Purpose The purpose of this paper is to study detection, microstretch function, temperature distribution function and thermoelastic damping analysis due to thermal variations and stretch forces in homogeneous, isotropic microstretch, generalized thermoelastic thin circular plate. Method This theory is based on the Kirc... | Study of Thermoelastic Damping in Microstretch Thermoelastic Thin Circular Plate | 10.1007/s42417-020-00213-6 |
2021-01-01 | Ships operating in waves are continuously subjected to varying loads from waves. As a result of these loads the ship undergoes rigid body motions and deformations. The latter can be subdivided into two types, a quasi-static and a dynamic response. Two dynamic responses that are of interest for ships are springing and w... | Calculation of Structural Damping of the Global Hull Structure from In-Service Measurements | 10.1007/978-981-15-4672-3_22 |
2021-01-01 | Pertaining to randomness in solar energy, its integration with synchronous generation needs robust controller design for improving small signal stability. Industrial proportional integral and lead-lag controllers are very much popular. But, due to complexity in power system the robustness of controller can be much enha... | Dynamic Stability Enhancement of a Variable Solar Penetrated Power System by Fractional UPFC-Based Controller | 10.1007/978-981-15-4692-1_10 |
2021-01-01 | We study the Cauchy problem of the semilinear damped wave equation in one space dimension. We show the existence of global solutions in the critical case with small initial data in weighted L ^2-spaces. This problem in multidimensional cases was dealt with in Sobajima (Differ Integr Equ 32:615–638, 2019) via the weight... | Remark on One Dimensional Semilinear Damped Wave Equation in a Critical Weighted L
^2-space | 10.1007/978-3-030-73363-6_14 |
2021-01-01 | Optimized damping ratio of power system can effectively suppress the system low frequency oscillation. An improved gravity search algorithm is proposed for coordination and optimization the parameters of the power system stabilizer based on the standard gravity search algorithm. This algorithm introduces the black hole... | Coordinated Optimization of Multi-Machine PSS Based on Improved Gravitational Search Algorithm | 10.1007/978-981-33-6606-0_3 |
2021-01-01 | This chapter describes various methods for the seismic design of new steel building structures equipped with supplemental dampers and the seismic retrofitting of existing structures by supplemental dampers. The most widely used dampers are the fluid viscous ones (linear or nonlinear), which enhance the seismic energy o... | Design Using Supplemental Dampers | 10.1007/978-3-030-80687-3_13 |
2021-01-01 | Immune system provides the mechanisms for attacking foreign invaders, eliminating autologous toxic substances and offering self-tolerance. A reductionist approach of the immune system components and their interactions as provided in this chapter will offer knowledge important to better understand the core mechanisms of... | Basic Immunology | 10.1007/978-3-030-56670-8_1 |
2021-01-01 | Throughout the past decades, seismic isolation of structures has attracted the attention of civil engineers and scientists. Research around this field has progressed tremendously, starting from the use of simple elastomeric bearings for the decoupling of the superstructure from the foundation and moving toward the inve... | KDamper Concept for Base Isolation and Damping of High-Rise Building Structures | 10.1007/978-981-15-8049-9_16 |
2021-01-01 | The KDamper is a novel passive vibration isolation and damping concept, based essentially on the optimal combination of appropriate stiffness elements, which include a negative stiffness element. The KDamper concept ensures the static stability of the structure, does not require heavy masses, and can achieve better dyn... | Design and Optimization of the KDamper Concept for Seismic Protection of Bridges | 10.1007/978-981-15-8049-9_12 |
2021-01-01 | Smart materials are currently the most sought-after material systems, today. This is because of their peculiarities in response and functionality when compared to conventional materials. Shape memory materials are one of the most relevant and evolving smart materials because of their associated anthropomorphic properti... | Shape Memory Nanomaterials for Damping Applications | 10.1007/978-3-030-11155-7_165-1 |
2021-01-01 | The undesirable effects of roll motion of ships (rocking about the longitudinal axis) became noticeable in the mid-nineteenth century when significant changes were introduced to the design of ships as a result of sails being replaced by steam engines and the arrangement being changed from broad to narrow hulls. The com... | Control of Ship Roll Motion | 10.1007/978-3-030-44184-5_123 |
2021-01-01 | This study aims to analyze the fluttering in the gas turbine compressor blade and the aerodynamic damping effects on the gas compressor blades by analyzing the damping coefficient sign in the model. The flutter in aerodynamic profiles is referred to as the self-excited vibration in air-foils due to unsteady pressure os... | Flutter and Modal Analysis of Gas Turbine Compressor Blades | 10.1007/978-981-16-0159-0_62 |
2021-01-01 | A performance based seismic design method for plane steel moment resisting and braced framed structures is described. It is a force-based seismic design method employing different modal (or strength reduction) factors for the first four significant modes of the frame, instead of the same constant behavior factor for al... | Design Using Modal Behavior Factors | 10.1007/978-3-030-80687-3_9 |
2021-01-01 | Models for analyzing squeeze film air damping depending on the oscillation mode of cantilever and double-clamped micro/nanobeam resonators are presented. The models are obtained from the damping theory of a rigid rectangular plate moving parallelly to a nearby object in viscous and molecular flow regime and electrostat... | Models for analyzing squeeze film air damping depending on oscillation modes of micro/nano beam resonators | 10.1007/s00419-020-01775-3 |
2021-01-01 | Abstract The radio occultation measurements of the signal intensity (λ = 32 cm) of the Venera-15 and -16 satellites, carried out from October 16 to October 31, 1983, are used to analyze the activity of internal waves in the northern polar atmosphere of Venus. Observations of the intensity of radio waves provide importa... | Activity of Small-Scale Internal Waves in the Northern Polar Atmosphere of Venus by Radio Occultation Measurements of Signal Intensity (Λ = 32 cm) from Venera-15 and -16 Satellites | 10.1134/S0038094621010044 |
2021-01-01 | Quantum optomechanics extends the idea that light forces can achieve the quantum control of mechanical motion to mesoscopic and macroscopic systems. Following a semiclassical introduction to cold damping and the optical spring effect, we show how sideband cooling can bring those systems to their quantum mechanical grou... | Quantum Optomechanics | 10.1007/978-3-030-76183-7_11 |
2021-01-01 | This paper proposes a nonlinear optimization approach for the ride comfort based on nonlinear damping to improve the optimized reliability of ride comfort of the commercial vehicle. First, a vibration model of a commercial vehicle is established and followed by a road excitation model and a nonlinear damping model that... | Ride Comfort Optimization Method for Commercial Vehicle Based on Nonlinear Damping and PSO | 10.1007/978-981-15-7945-5_25 |
2021-01-01 | This chapter considers dynamic modeling of solid mass on soil base. Features of finite-element modeling soil massif are discussed on the base optimal selection of representative volume with damping belts. As the test task, it is considered lattice of partitioning a three-layer half-plane into finite elements, with the ... | Dynamic Modeling of Solid Mass on Soil Base | 10.1007/978-3-030-59230-1_8 |
2021-01-01 | The best of effective design and practices of constructive methods in the analysis of rotor excessive vibration will yield the solutions for the dynamic problems. The extensive effusion of the finite element method (FEM) strongly induced in the area of rotordynamic studies and can give accurate results. Diagnosis of a ... | Dynamic Response Analysis of Rotating Shaft-Bearing System with an Open Crack | 10.1007/978-981-15-5701-9_42 |
2021-01-01 | The ultimate load of a structure is transferred to the soil by the base of the structure known as the foundation. The loads which act on the foundation are basically of two types, i.e. static load and dynamic load. The influence zone of static load which is due to dead and live load is limited to a certain area around ... | Waste Material a Sustainable Remediation for Settlement Caused by Pseudo-static Loading at Nearby Footing | 10.1007/978-981-15-9554-7_16 |
2021-01-01 | This study is proposed to devise the behavior of temporomandibular joint (TMJ) while jaw opening and closing movements in human beings using bond graph. TMJ is the most active and extensively used biomechanical joint. To diagnose TMJ disorders and provide correct medical care by exploring jaw behavior, accurate dynamic... | Modeling and Simulation of Human Temporomandibular Joint Using Bond Graphs—A One-Dimensional Model | 10.1007/978-981-33-4684-0_72 |
2021-01-01 | Statistical energy analysis (SEA) has been extensively used for predicting the transmission loss of sound and vibration through the complex structural-acoustic systems. The SEA method proved to be an effective tool for analysing the response of such complex systems at early design stage of the product. In the present s... | Statistical Energy Analysis Parameters Investigation of Composite Specimens Employing Theoretical and Experimental Approach | 10.1007/978-981-33-4550-8_12 |
2021-01-01 | Tool vibration is more critical in the machining of deep holes, where the tool overhang is greater, and, consequently, is the tendency to chatter. This work presents recent designs and dynamic models of boring bars with different passive damping configurations explored in the internal turning in deep holes using harden... | Passive Damping Techniques for Vibration Suppression in Boring Operation with Long Overhangs | 10.1007/978-981-15-9529-5_22 |
2021-01-01 | Abstract The paper presents a brief review of design for aircraft engine pipeline supports with multilayer plate dampers and dampers made of MR material. A new way of manufacturing the dampers from MR material is proposed. Problems of designing and studying the elastic-damping, dynamic and life time characteristics of ... | New Dampers Made of MR Material for Aircraft Engine Pipeline Supports | 10.3103/S1068799821010062 |
2021-01-01 | Large quantities of coal ashes are being generated by thermal power plants (coal-fired) all over the world. The coal ashes are proving to be potentially hazardous materials causing environmental pollution. Bulk utilization of fly ash requires a relatively good knowledge of the characteristics of fly ashes, their respon... | Dynamic Properties of Fly Ash–Sand Mixtures | 10.1007/978-981-33-6564-3_62 |
2021-01-01 | Padhi, Sukanya Nayak, Itishree The main objective of this paper is to examine the influence on velocity and temperature profiles of an unsteady, reactive, incompressible, second-grade fluid with low electrical conductivity and variable viscosity within porous channel with asymmetric cooling at the walls. The highly cou... | Analysis and Computation of Reactive Second-Grade Fluid Flow with Variable Viscosity Within Porous Couette Device | 10.1007/978-981-16-1402-6_12 |
2021-01-01 | This article discusses the features of using various designs of elastic-damping devices on GTE supports, including: support with a hydrodynamic damper (with and without an elastic element), support with an elastic ring and support with a plate damper. An analysis of their design is given in terms of the impact on the s... | Features of the Use of Damper Supports of Various Designs in a Gas Turbine Engine | 10.1007/978-981-33-6060-0_33 |
2021-01-01 | Accurate seismic analysis of concrete dams has a great impact not only on design of the new dams but also on the stability assessment of the existing ones. In this regard, one of the challenging issues is to consider the dynamic effects of radiation damping due to the mass of the foundation rock on the seismic response... | Seismic Analysis and Damage Evaluation of Pine Flat Concrete Dam | 10.1007/978-3-030-51085-5_4 |
2021-01-01 | Abstract— We study the stability of a one-dimensional laminated beam which consists of two identical layers of uniform thickness. An adhesive of small thickness is bonding the two layers and creating a restoring force thereby producing a damping called adhesive or structural damping at the interface. It is well-known i... | Exponential Stability of Laminated Beams with Interfacial Slip | 10.3103/S0025654421010039 |
2021-01-01 | In this article, a device design is described to convert vibration energy exerted on a vehicle during motion on different road conditions. This is achieved by converting the vibrational energy to electrical energy by utilizing Faraday’s law. Selection of mounting point is done by using first principle modelling approac... | Fabrication and Performance Analysis of a Device to Transform Vibration Energy on an Automobile | 10.1007/978-981-15-3639-7_4 |
2021-01-01 | This study deals with the optimization of parameters of multiple tuned mass damper (MTMD) system for seismic vibration control considering uncertain bounded structural parameters. An approach based on Taylor expansion of objective function along with subsequent interval extension is taken into account in this study. Th... | Stochastic Structural Optimization of Multiple Tuned Mass Damper (MTMD) System with Uncertain Bounded Parameters | 10.1007/978-981-15-5235-9_28 |
2021-01-01 | Magneto-rheological dampers have been utilized quite effectively to reduce vibration levels in automobiles in recent years. The objective of this work is to determine the optimum dimensions of a magneto-rheological damper based on magnetic saturation. As stress and magnetic field can be analyzed conveniently in the “AN... | Geometry Optimization of Magneto-Rheological Damper Based on Magnetic Saturation | 10.1007/978-981-15-8704-7_86 |
2021-01-01 | The damped oscillations of a spherical pendulum in planar motion is examined in a wind tunnel. Angular deflections and accelerations are measured for various wind speeds and their influence on the periods of oscillation and the time to complete pendulum rest are presented. | Damped Oscillations of Spherical Pendulums | 10.1007/978-981-33-4960-5_41 |
2021-01-01 | Performance-based seismic engineering is nowadays adopted for economical design of structures to resist earthquakes and it requires nonlinear static pushover analysis to be performed. In this approach, the energy dissipation due to nonlinear behavior of the structures is taken into account by obtaining the equivalent v... | Assessment of hysteretic damping in reinforced concrete structures using local hinge characteristics | 10.1007/s10518-020-00968-z |
2021-01-01 | This chapter describes some of the recent studies on the optimal control of structures. Initially, different passive, active and semi-active control devices are introduced and the importance of optimization in each case is discussed. A comprehensive literature review on the optimal design of various well-known control ... | Current Trends in the Optimization Approaches for Optimal Structural Control | 10.1007/978-3-030-61848-3_5 |
2021-01-01 | The present protocol introduces a live-cell imaging of secretion activity (LCI-S) that is useful to visualize the real-time release of molecules from individual cells using an immunoassay coupled with total internal reflection fluorescence (FL) microscopy. This novel “live”-cell imaging technique has helped uncover the... | Live-Cell Imaging Technique to Visualize DAMPs Release During Regulated Cell Death | 10.1007/978-1-0716-1258-3_28 |
2021-01-01 | A solar tracker is a machine that uses a mechanical prime mover to tilt solar photo voltaic panels from east to west during the day to track the sun for maximizing the production of PV power by keeping the incident angle of sun-rays perpendicular to the panel surface. Drag and lift produced by the wind on the surface a... | Damping of Wind-Induced Galloping Oscillations of Solar Trackers | 10.1007/978-981-15-4477-4_36 |
2021-01-01 | We are witnessing a great increase in the use of auxetic structure in comparison to their conventional counterparts in these recent years. They have exhibited numerous advantages such as a high strength, stiffness and energy absorption. On the other side, we are also witnessing the emergence of eco-composite materials ... | Bending Fatigue Behaviour of a Bio-based Sandwich with Conventional and Auxetic Honeycomb Core | 10.1007/978-3-030-76517-0_6 |
2021-01-01 | Contemporary seismic isolation systems for bridge structures provide (A) horizontal isolation from the effects of ground motion and (B) an energy dissipation mechanism to reduce displacements. Throughout the years many kinds of seismic isolation mechanisms have been developed, with the concept of introducing negative s... | Frequency-Based Design of the KDamper Concept for Seismic Isolation of Bridges | 10.1007/978-981-15-8049-9_11 |
2021-01-01 | Different types of dynamic loads will originate from the external sources like aerodynamic forces in case of airborne applications and road unevenness in case of automotive applications. Aircraft structures, aerospace vehicle structures, automotive structures, etc., are manufactured by maximum utilization of plate-like... | Design and Optimization of Constrained Damping Layer Thickness of Aluminium Plate Structure at Various Wave Modes of Vibration | 10.1007/978-981-15-4739-3_9 |
2021-01-01 | Abstract Transverse vibrations of a double-layered viscoelastic orthotropic graphene sheet system are investigated. The two sheets in the system are coupled by the visco-Pasternak medium. General governing equations for free and forced vibrations of the double-layered graphene sheet system with a high-order surface str... | FREE AND FORCED VIBRATIONS OF DOUBLE-LAYERED VISCOELASTIC ORTHOTROPIC GRAPHENE SHEETS WITH A HIGH-ORDER SURFACE STRESS EFFECT | 10.1134/S0021894421010168 |
2021-01-01 | The Space Launch System (SLS) and its Mobile Launcher (ML) will be transported to the launch pad via the Crawler-Transporter (CT) system. Rollout (i.e., transportation) loads produce structural loads on the integrated SLS/Orion Multi-Purpose Crew Vehicle (MPCV) launch vehicle which are of a concern with respect to fati... | Feasibility Study of SDAS Instrumentation’s Ability to Identify Mobile Launcher (ML)/Crawler-Transporter (CT) Modes During Rollout Operations | 10.1007/978-3-030-47713-4_12 |
2021-01-01 | Forced oscillations in a system with a source of energy of limited power in the presence of delays in the forces of elasticity and damping are considered. The elastic force also includes a non-linear component. The solution of the system of equations with nonlinearity was performed using the method of direct linearizat... | Forced Oscillations with Delays in Elastic and Damping Forces | 10.1007/978-3-030-80472-5_16 |
2021-01-01 | This study is motivated to find out whether the possibility of forest fire could be predicted based on identifying the reduction of moisture content in the plant. Toward this direction, we explored, specifically, the effect of decreasing water content in the plants on its mechanical properties by a simple yet novel met... | Understanding the Imminence of Forest Fire Using Laser Doppler Vibrometer | 10.1007/978-981-15-8049-9_28 |
2021-01-01 | In this paper, the Discrete Sources Method has been extended to describe the influence of the geometry asymmetry of a core-shell particle accounting for the effect of spatial dispersion inside the plasmonic metal shell. We found that varying the plasmonic shell thickness has more influence on the near field intensity d... | Quality of Control in the Tavis–Cummings–Hubbard Model | 10.1007/s10598-021-09517-y |
2021-01-01 | When the suspension deforms, damping force is generated as the piston of the shock absorber moves, but a time difference occurs before the large hydraulic damping force rises. At the same time the frictional force in the shock absorber is playing an important role in generating effective damping force against deformati... | The Power of Oil – Influence of Shock Absorber Oil on Vehicle Ride and Handling Performance | 10.1007/978-3-662-63193-5_8 |
2021-01-01 | Today modern 3D computational fluid dynamics (CFD) and computational structural mechanics (CSM) codes are coupled to predict the interaction between fluids and solids. Within the scope of this work the multiphysics codes ANSYS CFX-MOR and ANSYS CFX-Mechanical are validated against the Vattenfall Rod Vibration Experimen... | Validation of Coupled CFD-CSM Methods for Vibration Phenomena in Nuclear Reactor Cores | 10.1007/978-3-030-55594-8_7 |
2021-01-01 | The cable detection robot is of great significance to the automatic maintenance of Bridges. In order to ensure the climbing stability of the detection robot, a spring - magnetorheological damping coupling loading mechanism was proposed. Firstly, aiming at the influence of vibration and disturbance on cable safety perfo... | Research on Damping Control of Cable-Climbing Robot Based on Spring-Magnetorheological Damping Coupling Mechanism | 10.1007/978-3-030-89134-3_71 |
2021-01-01 | Relative density is commonly used to quantify the looseness or denseness of the in situ soil. However, its determination is not possible in the case of cohesive soils. Hence, relative compaction is used as a governing parameter to represent the different states of natural in situ conditions in cohesive soils. Relative ... | Effect of Relative Compaction on Dynamic Behaviour of Low Plasticity Cohesive Soil | 10.1007/978-981-33-4001-5_11 |
2021-01-01 | This chapter discusses the problem of wide-area control (WAC) for large-scale power transmission systems. The discussion covers two main applications, namely, wide-area oscillation damping control and wide-area voltage control. Scalable control methods are reported for both applications, highlighting important challeng... | Wide-Area Control of Power Systems | 10.1007/978-3-030-44184-5_100125 |
2021-01-01 | The proposed observer-based control mechanism solves the trajectory tracking problem in the presence of external disturbances with the reduction in sensor numbers. This systematically considers the quadcopter nonlinear dynamics and parameter and load variations by adopting the standard controller design approach based ... | Velocity-sensorless proportional–derivative trajectory tracking control with active damping for quadcopters | 10.1007/s11071-020-06193-2 |
2021-01-01 | Parametric oscillations in a nonlinear system with a source of energy of limited power in the presence of delays in the forces of elasticity and damping are considered. The system model includes a rod-oscillatory system and an electric motor-energy source. To solve the nonlinear equations of motion of the system, the m... | Parametric Oscillations at Delays in the Forces of Elasticity and Damping | 10.1007/978-3-030-80531-9_16 |
2021-01-01 | Power-to-volume density is a critical metric for all renewable energy technologies. Harnessing Marine Hydrokinetic (MHK) energy using a single linear or nonlinear oscillator with a cylinder in Flow Induced Oscillations (FIO) has proven to be an efficient and environmentally compatible method. MHK power harnessing by tw... | Synergistic Flow Induced Oscillations of Multiple Cylinders in Harvesting Marine Hydrokinetic Energy | 10.1007/978-3-030-55594-8_26 |
2021-01-01 | Vibration damping is a paramount factor in understanding vibrations in structures because the response of a structure under stationary dynamic loads, at resonance, is directly (inversely) proportional to the damping. Also, transient response of a structure decays exponentially at a rate determined by the damping factor... | Vibration Damping of Large Containership in Operation | 10.1007/978-981-15-4672-3_20 |
2021-01-01 | Grand construction projects all over Egypt require large infrastructure projects. In Northern Egypt where large buildings are needed for new developments, large areas of soft soils are abundant. These buildings transfer heavy static and dynamic loads to soil. Soft clays can be stabilized to carry these loads with minim... | Dynamic Response of Stabilized Soft Clay Under Cyclic Loading at Low Shear Strain Level | 10.1007/978-3-030-62908-3_13 |
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