汽车前纵梁吸能盒结构耐撞性多目标优化

徐中明,王青青,范维春,张志飞

振动与冲击 ›› 2021, Vol. 40 ›› Issue (3) : 212-217.

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (3) : 212-217.
论文

汽车前纵梁吸能盒结构耐撞性多目标优化

  • 徐中明,王青青,范维春,张志飞
作者信息 +

Multi-objective optimization of crashworthiness of energy-absorbing box for vehicle front longitudinal beam

  • XU Zhongming, WANG Qingqing, FAN Weichun, ZHANG Zhifei
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文章历史 +

摘要

吸能盒上诱导槽的分布形式对汽车碰撞性能有很大影响。以汽车前纵梁吸能盒结构为对象,建立整车正面碰撞仿真模型,对吸能盒结构的耐撞性进行了多目标优化设计。以吸能盒上诱导槽之间的间距为设计变量,使用Hammersley方法采集样本点后,以车辆吸能盒的最大吸能量E、最大刚性墙反力F以及车身最大加速度a为目标函数,通过kriging法以及径向基法构建各目标函数的近似代理模型,并检验了近似模型的精度。采用第二代非劣排序遗传算法(NSGA-Ⅱ)进行了多目标优化。结果表明,与原模型相比,优化后的非均匀分布形式的诱导槽结构耐撞性改善明显,变形压缩模式更充分、有序。

Abstract

The distribution form of inducing grooves on energy-absorbing box has a great influence on vehicle collision performance. Here, taking energy-absorbing box structure of vehicle front longitudinal beam as the study object, the simulation model of vehicle frontal collision was established, and the multi-objective optimization design was performed for the crashworthiness of the energy-absorbing box structure. Taking spacing between inducting grooves on the box as the design variable, after sample points were collected using Hammersley method, the maximum energy absorption E of the box, the maximum rigid wall reaction force F and the maximum car body acceleration a were taken as objective functions. Kriging method and the radial basis method were used to construct the approximate surrogate model for each objective function, and accuracies of these models were tested. The multi-objective optimization was performed for these models with the second-generation non-inferior sorting genetic algorithm-II(NSGA-II). The results showed that compared with the original model, the non-uniform distribution form of inducing grooves on the box after optimization obviously improves the box’s crashworthiness; the deformation compression mode is more sufficient and orderly.

关键词

汽车 / 抗撞性 / 吸能盒 / 诱导槽 / 多目标优化设计

Key words

vehicle / crashworthiness / energy-absorbing box / inducing grooves / multi-objective optimization

引用本文

导出引用
徐中明,王青青,范维春,张志飞. 汽车前纵梁吸能盒结构耐撞性多目标优化[J]. 振动与冲击, 2021, 40(3): 212-217
XU Zhongming, WANG Qingqing, FAN Weichun, ZHANG Zhifei. Multi-objective optimization of crashworthiness of energy-absorbing box for vehicle front longitudinal beam[J]. Journal of Vibration and Shock, 2021, 40(3): 212-217

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