This paper used the Hyper Mesh and LS-DYNA software to establish a dummy-seat finite element simulation model. The head, chest and neck injury of the dummy were analyzed respectively in the frontal impact and rear imp...This paper used the Hyper Mesh and LS-DYNA software to establish a dummy-seat finite element simulation model. The head, chest and neck injury of the dummy were analyzed respectively in the frontal impact and rear impact. It was indicated that modification of seat was needed to meet the requirements. The simulation results showed that the original model cannot provide effective protection for the occupants and need for structural improvements. According to the simulation results of deformation and stress conditions of the seat parts, the original seat structure was improved and optimized for four improvement schemes, including the structure optimization of the seat side panel, the center hinge, framework under the cushion and the backrest lock. The results indicated that the optimized seat improved the occupant protection performance by reducing occupant damage parameters compared with original seat, which illustrated that the optimization basically met the target.展开更多
应用HyperMesh前处理软件建立了前排座椅有限元仿真模型,应用LS-DANY求解器对Hybrid III 50%假人进行正面碰撞仿真试验,所得结果与台车试验结果对比,验证了模型的有效性。同时对碰撞中假人胸部的伤害情况进行分析,结合试验结果发现假人...应用HyperMesh前处理软件建立了前排座椅有限元仿真模型,应用LS-DANY求解器对Hybrid III 50%假人进行正面碰撞仿真试验,所得结果与台车试验结果对比,验证了模型的有效性。同时对碰撞中假人胸部的伤害情况进行分析,结合试验结果发现假人模型胸部压缩量及粘性伤害指数均高于2018版C-NCAP评价标准,需要对座椅骨架进行优化。通过对座椅各部件应力与应变的分析,发现原座椅骨架中侧板与下潜管的受力及变形量过大,提出应对侧板进行增加翻边与厚度,下潜管由直管改为弯管的优化,结果表明优化后的座椅相比原座椅,假人模型的胸部压缩量降低了10.19%,胸部粘性伤害指数降低了16.52%,符合标准要求,并起到指导设计的作用。展开更多
文摘This paper used the Hyper Mesh and LS-DYNA software to establish a dummy-seat finite element simulation model. The head, chest and neck injury of the dummy were analyzed respectively in the frontal impact and rear impact. It was indicated that modification of seat was needed to meet the requirements. The simulation results showed that the original model cannot provide effective protection for the occupants and need for structural improvements. According to the simulation results of deformation and stress conditions of the seat parts, the original seat structure was improved and optimized for four improvement schemes, including the structure optimization of the seat side panel, the center hinge, framework under the cushion and the backrest lock. The results indicated that the optimized seat improved the occupant protection performance by reducing occupant damage parameters compared with original seat, which illustrated that the optimization basically met the target.
文摘应用HyperMesh前处理软件建立了前排座椅有限元仿真模型,应用LS-DANY求解器对Hybrid III 50%假人进行正面碰撞仿真试验,所得结果与台车试验结果对比,验证了模型的有效性。同时对碰撞中假人胸部的伤害情况进行分析,结合试验结果发现假人模型胸部压缩量及粘性伤害指数均高于2018版C-NCAP评价标准,需要对座椅骨架进行优化。通过对座椅各部件应力与应变的分析,发现原座椅骨架中侧板与下潜管的受力及变形量过大,提出应对侧板进行增加翻边与厚度,下潜管由直管改为弯管的优化,结果表明优化后的座椅相比原座椅,假人模型的胸部压缩量降低了10.19%,胸部粘性伤害指数降低了16.52%,符合标准要求,并起到指导设计的作用。
