孙晓旺, 孙魁远, 秦伟伟, 张绍彦, 付条奇, 王显会. 功能梯度下肢保护装置设计与优化[J]. 工程力学, 2023, 40(10): 190-203. DOI: 10.6052/j.issn.1000-4750.2022.01.0070
引用本文: 孙晓旺, 孙魁远, 秦伟伟, 张绍彦, 付条奇, 王显会. 功能梯度下肢保护装置设计与优化[J]. 工程力学, 2023, 40(10): 190-203. DOI: 10.6052/j.issn.1000-4750.2022.01.0070
SUN Xiao-wang, SUN Kui-yuan, QIN Wei-wei, ZHANG Shao-yan, FU Tiao-qi, WANG Xian-hui. DESIGN AND OPTIMIZATION OF FUNCTIONALLY GRADED LOWER LIMBS PROTECTION SYSTEM[J]. Engineering Mechanics, 2023, 40(10): 190-203. DOI: 10.6052/j.issn.1000-4750.2022.01.0070
Citation: SUN Xiao-wang, SUN Kui-yuan, QIN Wei-wei, ZHANG Shao-yan, FU Tiao-qi, WANG Xian-hui. DESIGN AND OPTIMIZATION OF FUNCTIONALLY GRADED LOWER LIMBS PROTECTION SYSTEM[J]. Engineering Mechanics, 2023, 40(10): 190-203. DOI: 10.6052/j.issn.1000-4750.2022.01.0070

功能梯度下肢保护装置设计与优化

DESIGN AND OPTIMIZATION OF FUNCTIONALLY GRADED LOWER LIMBS PROTECTION SYSTEM

  • 摘要: 针对车辆底部爆炸冲击环境下的乘员安全问题,该文结合试验研究与有限元仿真,研究了乘员下肢在爆炸冲击环境下的运动及受损情况;设计了一种蜂窝铝防雷脚垫作为乘员下肢保护装置,研究了脚垫在爆炸冲击环境下的防护性能;研究了不同梯度结构对车内乘员下肢响应的影响;对蜂窝铝防雷脚垫进行多目标优化设计,得到厚度梯度型蜂窝铝防雷脚垫。结果表明:该文设计的蜂窝铝防雷脚垫可以通过吸收能量、降低冲击强度有效降低乘员下胫骨力,减小乘员下肢损伤;梯度结构相比于均质结构有更好的吸能特性;不同梯度结构对乘员下肢的防护效果不同,厚度梯度对乘员下肢响应的影响最大;与优化之前相比,优化后的乘员下肢保护装置能够使乘员左下胫骨力降低26.35%,右下胫骨力降低24.69%,脚垫总质量降低56.59%。

     

    Abstract: Aiming at the crew safety problem in the environment of explosion and shock at the bottom of vehicle, this paper combines the experimental research with finite element simulation to study the movement and damage of the crew's lower limbs in the explosion and shock environment. A honeycomb aluminum lightning protection foot pad is designed as the protection device of the crew's lower limbs. The protective performance of the foot pad is studied in the explosion and shock environment, the influence of different gradient structures on the response of lower limbs of the crews in the vehicle is studied, the multi-objective optimization design of the honeycomb aluminum lightning protection foot pad is carried out, and the thickness-gradient honeycomb aluminum lightning protection foot pad is obtained. The results show that the honeycomb aluminum lightning protection foot pad designed in this paper can effectively reduce the lower tibia force and the injury of lower limbs of the crew by absorbing energy and reducing the impact strength, the gradient structure has better energy absorption characteristics than the homogeneous structure, different gradient structures have different protection effects on lower limbs of the crew, and the thickness-gradient has the greatest impact on the response of lower limbs of the crew. Compared with the original model, the optimized crew lower limbs protection device can reduce the left lower tibia force by 26.35%, the right lower tibia force by 24.69% and the total mass of the foot pad by 56.59%.

     

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