Size and morphology crashworthiness optimization for automotive frontal structures using equivalent static loads method

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (7) : 56-61.

LU Shanbing 1, JIANG Weibo2, ZUO Wenjie1,3

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Abstract

Equivalent static loads method (ESLM) was introduced to study size and morphology crashworthiness optimization for automobile frontal structures to reduce maintenance cost and realize lightweight design of automotive frontal structures under lower speed frontal impacts. Taking minimizing the mass of automotive frontal structures as an objective function, thickness sizes of automotive frontal structures and morphology node coordinates as design variables, and invading quantity and process requirements of stiffeners as constrains, the crashworthiness optimization design was conducted. ESLM was used to convert this nonlinear and transient crashworthiness optimization problem into a multi-mode linear static optimization one. Numerical examples showed that ESLM can effectively be used to solve crashworthiness optimization problems and obtain their optimal solutions with a higher accuracy.

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automotive frontal structures / crashworthiness optimization / size and morphology optimization / equivalent static loads method

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LU Shanbing 1, JIANG Weibo2, ZUO Wenjie1,3. Size and morphology crashworthiness optimization for automotive frontal structures using equivalent static loads method[J]. Journal of Vibration and Shock, 2018, 37(7): 56-61

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