Load Extraction using Virtual Spindle Coupled Road Simulator for Vehicle Fatigue Durability
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摘要: 针对整车疲劳耐久性能开发中载荷提取的难题，提出利用虚拟轴耦合道路模拟器快速提取计算载荷的方法。研究建立了基于整车多体动力学模型和虚拟轴耦合道路模拟器的虚拟疲劳耐久测试系统，并以整车在试验场采集的载荷谱为模型输入条件，提取车辆模型的部件或子系统的计算载荷。通过与实验数据对比，研究表明各主要部件的载荷谱在时域上变化趋势基本一致，提取的载荷精度能够满足整车及零部件的疲劳耐久性分析要求。Abstract: Aiming at the problem of load extraction in the development of vehicle fatigue durability, a method of using virtual spindle coupling road simulator is proposed to extract the calculated road load quickly. A virtual fatigue and durability test system based on vehicle multi-body dynamic model and virtual spindle coupling road simulator system is established, and the road load spectrum collected by the vehicle in the proving ground is used as the model input condition, the calculated load of the components or subsystems of the vehicle model is extracted and is compared with the experimental data. The research results indicate that the load spectrum of the main components is basically consistent in the time domain, and the extracted load accuracy can meet the requirements of fatigue durability analysis of the whole vehicle and parts.
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Key words:
- vehicle body control /
- virtual simulation /
- fatigue durability /
- load extraction /
- load spectrum /
- virtual test system
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表 1 数据采集通道(模型输入)描述
采集通道名称 描述 数量 4个轮心六分力 Fx, Fy, Fz, Mx, My, Mz 24 4个轮毂垂直加速度 az 4 弹簧位移 D 4 车身三点加速度 ax, ay, az 9 
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