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该文探讨了汽车座椅聚合物泡沫座垫的非线性弹性-阻尼特性的一种建模方法及过程。首先进行了泡沫座垫的动态力学特性实验测试,根据座垫的非线性动态特性特征选择了模型的表达式,再通过大量实验数据对其进行了参数辨识,建立了座垫的一种非线性弹性-阻尼特性数学模型,表达了座垫的动态载荷与变形位移、速度的关系。另一方面,进行了实际人体在座垫上的正常坐姿体压分布测试,参考体压分布状态进行了座垫的离散化,建立了泡沫座垫的垂向非线性弹性-阻尼特性的离散化模型,可更好地模拟座椅-乘员系统的人体角振动响应特性。最后进行了所建立的聚合物泡沫座垫动态特性模型在座椅-乘员系统多体动力学响应模拟分析中的应用验证。
This paper discusses a modeling method and process for nonlinear elastic-damping characteristics of automotive seat polymer foam cushions. Firstly, the dynamic test of the foam cushion was carried out. The expression of the model was chosen according to the nonlinear dynamic characteristics of the cushion. Then a large number of experimental data were used to identify the parameters. A nonlinear The mathematical model of elastic-damping characteristic expresses the relationship between the dynamic load of seat cushion and deformation displacement and velocity. On the other hand, the normal body pressure distribution test of the human body on the seat cushion was carried out, the discretization of the seat cushion was done with reference to the body pressure distribution state, and the discretization of the vertical nonlinear elastic-damping properties of the foam cushion was established Model to better simulate the body-corner vibration response of seat-occupant systems. Finally, the application verification of the dynamic model of the polymer foam cushion established in the simulation analysis of the multi-body dynamic response of the seat-occupant system was carried out.