基于悬架非线性特性的稳定杆连杆建模方法研究

A Study on Modeling Method of Stabilizer Rod Based on Nonlinear Characteristics of Suspension

基于悬架多体系统非线性特性建立稳定杆连杆有限元模型,以道路试验采集的轮跳量作为输入,进行稳定杆连杆的强度分析,并对比运用压杆失稳理论和通过台架试验分别获得的连杆的临界载荷,对其建模方法进行评价。实车验证结果表明,基于悬架系统非线性特性的稳定杆连杆模型能精准地预测临界载荷和稳定杆连杆的应力,而压杆台架试验结果存在一定误差,失稳理论不能直接用于该零件的强度校核。

A finite element model for stabilizer rod is established based on nonlinear characteristics of suspension multi-body system,the strength of stabilizer rod is analyzed with the wheel hop acquired in road-test as input,and its modeling methods are evaluated through comparing the critical loads obtained by applying compression rod instability theory and bench test. The results of real vehicle verification show that the model for stabilizer rod based on nonlinear characteristics of suspension system can accurately predict the critical loads and the stress of stabilizer rod while the results of compression rod bench test have certain error,and the instability theory can not directly applied to strength check for stabilizer rod.