Q6儿童假人颈部有限元模型的建立与验证

运用逆向工程方法获得Q6儿童假人颈部几何模型并对其进行合理的网格划分,得到具有良好细节和较高精度的颈部有限元模型.通过参数敏感性分析,确定该颈部模型需要优化的材料参数,以真实假人颈部标定试验结果为基准,采用曲线匹配算法对相关材料参数进行正向和侧向标定试验,在2种工况下,对Q6儿童假人头部角度和力矩进行多目标优化,通过空间缩减序列的响应面优化方法经多次迭代得到优化结果.仿真结果表明,该有限元模型较好地满足了Q6儿童假人颈部的标定要求.

Development and Validation of a Finite Element Model of the Neck of the Q6 Child Dummy

Reverse engineering was used to develop a Q6 child dummy neck geometric model, and then a detailed and high-quality Q6 child dummy neck finite element (FE) model was developed. The material parameters of the neck FE model which should be optimized were determined after the sensitivity analysis of parameter variables. Based on the calibration test results of a real dummy neck, the Curve Mapping algorithm was applied to the multi-objective optimization of the material parameters of the neck FE model in the performance of head angles and moments in both frontal and lateral calibration tests, and optimized solutions were obtained after several iterations by sequential with domain reduction metamodel-based optimization method. The simulation has shown that the Q6 child dummy neck FE model meets the requirements of calibration quite well.