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在弹体侵彻硬目标环境中,弹载测控电路承受高g值冲击加速度作用。建立冲击过程中泡沫铝填充铝壳吸收能量最大化、体积比吸能最大化、测控电路承受加速度幅值最小化的多目标优化问题。以铝壳厚度和泡沫铝密度为设计变量,利用有限元软件LS-DYNA中的ALE算法得到不同设计变量的冲击信息,通过响应面法构造近似目标函数,引入权系数来表征各个目标在优化过程中的重要程度,并利用理想点法求解多目标优化问题的有效解。得出填充结构中壳厚度t的最优值为1.152mm、泡沫铝相对密度ρ′最优值为0.279。
In the projectile penetrating the hard target environment, the missile test and control circuit withstand high g-value impact acceleration. In the process of impacting, the maximum energy absorption, the volumetric energy absorption, and the multi-objective optimization problem that the measurement and control circuit can minimize the acceleration amplitude are investigated. Taking the thickness of aluminum shell and the density of aluminum foam as design variables, the impact information of different design variables is obtained by using ALE algorithm of finite element software LS-DYNA. The approximate objective function is constructed by response surface method and the weight coefficient is introduced to characterize the optimization process And use the ideal point method to solve the multi-objective optimization problem. The optimum value of the shell thickness t in the filled structure is 1.152mm, and the optimum value of the relative density of foamed aluminum ρ ’is 0.279.