A finite element model of the front door is built with passenger car as an example on Hypermesh/LS-DYNA software environment. It referring to the corresponding provisions in national law GB15743-1995, a front door model is simulated on the crashworthiness from side direction. Maximum resistance to squeeze pressure, initial resistance to squeeze pressure, intermediate resistance to squeeze pressure, door load displacement curve and power door force-displacement curve were obtained. The statistic analyses show that:the maximum resistance to squeeze pressure and intermediate resistance to squeeze pressure of the door meet regulatory requirements, the initial resistance to squeeze pressure doesn't. Each resistance to squeeze pressure meets the regulatory requirements by increasing internal crash board and using high-strength steel material for optimization. The vehicle door side crashworthiness is improved to protect the safety of passengers.%以某款乘用车的前车门为例,在Hypermesh/LS-DYNA软件环境下建立前车门的有限元模型,参照国家法规《GB15743-1995》中乘用车侧门强度的相应规定,将该车门模型进行侧面碰撞过程数值模拟,得到车门最大耐挤压力、初始耐挤压力、中间耐挤压力、车门载荷位移曲线和车门外力功位移曲线.仿真结果表明,该车门最大耐挤压力和中间耐挤压力满足法规要求,初始耐挤压力不满足法规要求.通过增加车门内部防撞板板厚,采用高强度钢材料进行优化,各耐挤压力均满足了法规要求,提高了车门抗撞性能,更有利于保护乘员安全.
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