用几何感知网络加速汽车碰撞仿真,精度媲美传统方法。
High-Fidelity Industrial Crash Dynamics Prediction via Geometry-Aware Operator Learning with Memory-Efficient Low-Rank Attention

- 基于几何感知的算子学习框架,捕捉多尺度形变特征。
- 在碰撞性能预测中实现高保真度,关键位置加速度误差低。
- 适合汽车安全研发人员快速模拟复杂碰撞场景。
汽车碰撞安全性优化仍面临安全关键挑战,需通过高保真仿真管理大规模非线性结构变形与能量耗散。传统有限元求解器计算成本高昂,新兴算子学习框架虽可快速替代,但在包含复杂几何、接触非线性及快速演化的瞬态变形的工业级碰撞分析中仍具挑战。本文提出GeoTransolver框架,在复杂保险杠梁与整车碰撞数据集上验证其可精准捕捉多尺度几何上下文,准确还原塑性变形模式及乘员关键位置加速度响应。我们系统评估了单次预测、时间条件与自回归滚动等时序策略,发现单次预测在显著降低训练开销和推理延迟的同时达到最优精度。此外,引入基于快速低秩注意力路由引擎(FLARE)的改进,使内存开销减少约2倍,并进一步提升对长程、高频瞬态的预测精度,同时保留原框架的几何感知交叉注意力优势。结果表明,几何感知算子学习在高保真、安全关键的汽车动力学建模中具备实际可行性。
原文摘要 · Abstract (English)
Automotive crashworthiness optimization remains a safety-critical challenge, requiring the management of large-scale nonlinear structural deformations and energy dissipation through iterative, high-fidelity simulations. While traditional finite element solvers are computationally prohibitive, emerging operator learning frameworks provide rapid surrogate predictions; however, applying them to industrial-scale crash analysis, where complex geometry, contact nonlinearities, and rapidly evolving transient deformation coexist, remains an open challenge. In this paper, we demonstrate that the GeoTransolver framework provides a viable solution for accurate, high-fidelity crash dynamics prediction at industrial scale. Benchmarked on complex bumper beam and full-vehicle crash datasets, GeoTransolver captures multi-scale geometric context and accurately resolves plastic deformation patterns as well as acceleration profiles at critical occupant locations. Beyond the architecture itself, we propose and systematically evaluate a suite of temporal prediction recipes, including one-shot, time-conditional, and autoregressive rollout strategies, demonstrating that the one-shot approach achieves state-of-the-art accuracy with significantly reduced training overhead and inference latency. As a secondary contribution, we introduce a Fast Low-rank Attention Routing Engine (FLARE)-based modification to the GeoTransolver attention backbone that reduces memory overhead by approximately 2x while further improving predictive accuracy for O(N) long-range, high-frequency transients, preserving the geometry-aware cross-attention strengths of the base framework. Our results highlight the practical viability of geometry-aware operator learning for high-fidelity surrogate modeling of complex, safety-critical automotive dynamics.
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