Multi-objective geometry optimization of composite sandwich shielding structure subjected to underwater shock waves

Hao Zhou, Rui Guo, Wei Jiang, Rongzhong Liu and Pu Song

Abstract

Multi-objective optimization was conducted to obtain the optimal configuration of a composite sandwich structure with honeycomb-foam hybrid core subjected to underwater shock waves, which can fulfill the demand for light weight and energy efficient design of structures against underwater blast. Effects of structural parameters on the dynamic response of the sandwich structures subjected to underwater shock waves were analyzed numerically, from which the correlations of different parameters to the dynamic response were determined. Multi-objective optimization of the structure subjected to underwater shock waves of which the initial pressure is 30 MPa was conducted based on surrogate modelling method and genetic algorithm. Moreover, optimization results of the sandwich structure subjected to underwater shock waves with different initial pressures were compared. The research can guide the optimal design of composite sandwich structures subjected to underwater shock waves.

Key Words

composite sandwich structures; multi-objective optimization; numerical simulation; surrogate model; underwater shock waves

Address

Hao Zhou:1)National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, P. R. China 2)School of Mechanical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, P. R. China Rui Guo:School of Mechanical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, P. R. China Wei Jiang:National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, P. R. China Rongzhong Liu:School of Mechanical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, P. R. China Pu Song:Xi'an Modern Chemistry Research Institute, 168 Zhangbadong Road, Xi

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