轴向冲击作用下嵌套式薄壁球壳结构吸能性能研究及优化设计

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (10) : 237-242.

论文

戎翔 1 ，邓安仲2 ，李飞 2 ，陈晨 3

作者信息 +

Research on energy absorption property and optimization design of nested thin-wall spherical shells under axial impact

RONG Xiang1 DENG An-zhong2 LI Fei 2 CHEN Chen3

Author information +

文章历史 +

摘要

针对单个小直径薄壁球壳吸能能力有限的问题，提出了一种嵌套式薄壁球壳结构，并通过有限元软件模拟其在轴向冲击下的动态响应过程，分析了外球壳厚度、内球壳高度和内球壳厚度对结构在轴向冲击下力学性能和变形模式的影响；建立了以比吸能、冲击荷载峰值为吸能性能的评价指标，以外球壳厚度、内球壳高度和内球壳为试验变量的响应表面模型；基于响应表面模型，通过非支配遗传算法（NSGA-Ⅱ）对试验变量进行优化，提出了不同工况下结构几何参数选取方案。结果表明，结构几何参数对其吸能特性影响显著，建立的响应表面模型准确可靠，优化方法得到了有限元模拟验证，有利于工程实际应用。

Abstract

The energy absorption ability of a single small span thin-wall spherical shell is limited. A new nested thin-wall spherical shell structure is designed and the dynamic response under axial impact is simulated through the finite element software. The effect of the thickness of the outer spherical shell, the height of the inner spherical shell and the thickness of the inner spherical shell on mechanical properties and deformation modes under axial impact is also analyzed. Response surface model is established based on the evaluation index of specific energy absorption (SEA) and peak crush load(PCL), with the test variables of thickness of the outer spherical shell, height of the inner spherical shell and thickness of inner spherical shell. Based on the response surface model, the test variables are optimized with non-dominated sorting genetic algorithms (NSGA-Ⅱ). Under different working conditions, the selection of the geometry parameters is put forward. The results show that the geometrical parameters has significant effects on the energy absorption characteristics. The response surface model is accurate and reliable. And the optimization method which verified by finite element simulation is beneficial to engineering application.

导出引用

戎翔 1,邓安仲2,李飞 2,陈晨 3. 轴向冲击作用下嵌套式薄壁球壳结构吸能性能研究及优化设计[J]. 振动与冲击, 2017, 36(10): 237-242

RONG Xiang1 DENG An-zhong2 LI Fei 2 CHEN Chen3. Research on energy absorption property and optimization design of nested thin-wall spherical shells under axial impact[J]. Journal of Vibration and Shock, 2017, 36(10): 237-242

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