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
1.Logistics Engineering University, a. Material science and Engineering, b. Military engineering and management, c. Logistics Information& Logistics Engineering, Chongqing 401311
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.
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. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(10): 237-242.
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