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dataset_info:
features:
- name: configuration_id
dtype: string
- name: load_position
dtype: float64
- name: load_positions
list: float64
- name: load_values
list: string
- name: support_positions
list: float64
- name: parameters
dtype: string
- name: x_coordinates
list: float64
- name: shear_force
list: float64
- name: bending_moment
list: float64
- name: slope
list: float64
- name: deflection
list: float64
- name: shear_force_info
dtype: string
- name: bending_moment_info
dtype: string
- name: slope_info
dtype: string
- name: deflection_info
dtype: string
- name: points
dtype: string
- name: segments
dtype: string
- name: reactions
dtype: string
- name: internal_loads
dtype: string
- name: deflections
dtype: string
- name: query
list: string
- name: answer
list: string
- name: category
dtype: string
- name: version
dtype: string
- name: dist_load_k
dtype: int64
- name: dist_load_n_end
dtype: int64
- name: moment_c
dtype: int64
- name: length_multiplier
dtype: int64
- name: dist_load_n_start
dtype: int64
- name: moment_x_frac
dtype: float64
splits:
- name: train
num_bytes: 563778
num_examples: 123
download_size: 454653
dataset_size: 563778
configs:
- config_name: default
data_files:
- split: train
path: data/train-*
---
# BeamRL-EvalData-v2
Expanded evaluation dataset for **BeamPERL** ([paper](https://arxiv.org/abs/2603.04124), [code](https://github.com/lamm-mit/BeamPERL)): 123 symbolic beam-mechanics problems asking for the reaction forces at the supports, with ground-truth answers as signed coefficients of the load symbol `P` (e.g. `0.222222P`).
## Categories
| category | samples | description |
|---|---|---|
| `id` | 30 | single point load, supports at beam ends |
| `ood_loads` | 30 | 2–4 point loads, supports at beam ends |
| `ood_supports` | 18 | varying support positions, 1–3 point loads |
| `ood_dist_left` / `ood_dist_middle` / `ood_dist_right` | 5 + 5 + 5 | distributed load anchored to the pin / fully interior / anchored to the roller |
| `ood_length` | 15 | beam length varied (7L, 11L, 13L) |
| `ood_moment` | 15 | pure applied couple, no point load |
The original 24-sample evaluation set ([`tphage/BeamRL-EvalData`](https://huggingface.co/datasets/tphage/BeamRL-EvalData)) is included bit-identically as a subset (counted within `id`, `ood_loads`, and `ood_supports`).
All configurations are solved symbolically with a modified [SymBeam](https://github.com/amcc1996/symbeam) and verified for force/moment balance; natural-language question variants (`query`, 4 per sample, the evaluation harness consumes `query[0]`) are generated with an LLM. The dataset is produced by `DataGen/generate_eval_v2.py` in the BeamPERL repository.
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