基于混合法的碰撞仿真中母材参数的反求优化研究

Research on Inverse Optimization of Base Material Parameters in Collision Simulationbased on Hybrid Method

  • 摘要: 以试验动态响应数据为基准,基于有限元方法和反求优化方法对碰撞仿真材料参数进行反求优化,是一种有效获取高精度母材材料参数的方法。然而,传统基于仿真和优化算法的直接反求法存在效率低下的问题。为了提高反求优化效率,该文提出了基于拉丁超立方设计、RBF近似模型以及NSGA-II算法相结合的混合法。以吸能盒的压缩试验数据为基准,对比了两种反求优化方法的精度和效率。研究结果表明,两种反求优化方法都能满足工程应用精度。相比于直接法,混合法所需的仿真模型样本数量更少,效率更高。所研究内容可为快速准确获取碰撞仿真的材料参数提供参考。

     

    Abstract: Using experimental dynamic response data as a reference, the inverse optimization of material parameters in collision simulation based on the finite element method and inverse optimization techniques provides an effective approach for obtaining high-precision base material parameters. However, traditional direct inverse methods based on simulation and optimization algorithms often suffer from low efficiency. To improve the efficiency of inverse optimization, this paper proposes a hybrid method that integrates Latin hypercube design, a radial basis function (RBF) surrogate model, and the NSGA-II algorithm. Taking compression test data of an energy-absorbing box as the reference, the accuracy and efficiency of the two inverse optimization methods were compared. The results show that both methods can meet the accuracy requirements for engineering applications. Compared with the direct method, the hybrid method requires fewer simulation model samples and achieves higher efficiency. The findings of this study provide a useful reference for the rapid and accurate acquisition of material parameters in collision simulation.

     

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