随着有限元仿真模拟计算技术的成熟,有限元模型越来越多被用于汽车碰撞安全研究进行模拟试验,有限元模型的调试和对标对模型复现实际试验的精确程度有着重要影响。为研究影响有限元模型仿真计算与实际试验输出差异的主要因素,进行了14次行人头模块冲击试验,并建立了相应的有限元模型进行仿真模拟。在有限元模型对标的过程中,通过改变有限元模型结构建立上的处理方式和一些容易影响有限元模型输出的参数,得到了一些有限元模型对标的有效手段,并总结了有限元建模过程中需要严格控制的对结果影响显著的敏感参数。

With the development of finite element method, finite element models become commonly used in the research of automotive safety with debugging and calibrating having great influence on the output accuracy of a finite element model. 14 pedestrian headform impact experiments were made to study the major factors that affect the output of an FE model, with the corresponding FE model being built. During the calibration of the FE model, some methods for FE model structure building have been used, with the sensitive parameters debugging, which leads to the conclusions about effective means for calibration and the sensitive parameters that should be controlled accurately in the FE modeling.