车辆悬架零部件载荷谱提取方法研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (2) : 103-110.

论文

车辆悬架零部件载荷谱提取方法研究

董国疆1，颜峰1，韩杰1，郎玉玲2

作者信息 +

Load spectrum extraction method for automobile suspension components

DONG Guojiang1，YAN Feng1，HAN Jie1，LANG Yuling2

Author information +

文章历史 +

摘要

优选载荷谱提取方法是提高汽车悬架零部件疲劳性能分析精度的关键。基于此，以某紧凑型SUV和某中级轿车为测试车型，通过实车试验场强化路面和室内振动台架试验采集得到轮心六分力和悬架多个监测部位的加速度、位移响应信号；实测整车参数并在ADAMS软件中建立整车刚柔耦合动力学模型；采用虚拟迭代法和约束加载法对多种振动台工况进行仿真，获取整车模型中监测点响应数据；在时域和均方根值两方面对比分析车身和悬架监测点的仿真与实测曲线。研究表明：约束加载法更适用于高频率、低幅值振动工况；虚拟迭代法相比约束加载法适用范围更广、仿真精度更高，但更耗时；同时，通过试验场搓板路和长波路工况验证了上述结论，分别使用虚拟迭代和约束加载两种方法提取了转向节载荷谱，基于伪损伤值分析了结果差异，并且发现约束加载法提取的载荷谱分析转向节疲劳寿命较虚拟迭代法保守。

Abstract

Optimizing the load spectrum extraction method is the key to improve the accuracy of fatigue analysis of automotive suspension components.Taking a compact SUV and a Middle Class as research objects, a rigid-flexible coupled multi-body dynamic model of the whole vehicle was established by using the ADAMS software with the parameters obtained by field tests.The acceleration and displacement response signals at the multi-position of suspension and the six-component force at wheel center were obtained by tests and measurements on a proving ground as well as on a real vehicle test rig.The virtual iteration method and body constrained method were used to simulate the working conditions of the test rig, and the response data at the monitoring positions of the multi-body model were obtained.The simulation and test curves at suspension monitoring positions were analyzed and compared in terms of the time domain signal and root mean square value.The results show that the body constrained method is more suitable for high frequency and low amplitude vibration conditions, and as contrast, the virtual iteration method has wider application scope and higher simulation accuracy, but is more time-consuming.The above conclusions were verified by the working tests on the washboard road and the long wave road in the proving ground.At the same time, the load spectrum at the steering knuckle was extracted by the above two methods, and the pseudo-damage value of the load spectrum was calculated.It is found that the fatigue life of the steering knuckle estimated by using the load spectrum extracted by the body constrained method is more conservative than that by the virtual iteration method.

导出引用

董国疆1，颜峰1，韩杰1，郎玉玲2. 车辆悬架零部件载荷谱提取方法研究[J]. 振动与冲击, 2021, 40(2): 103-110

DONG Guojiang1，YAN Feng1，HAN Jie1，LANG Yuling2. Load spectrum extraction method for automobile suspension components[J]. Journal of Vibration and Shock, 2021, 40(2): 103-110

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