商用车驾驶室全浮悬置系统正向开发流程研究

A Research on the Forward Development Procedure for the Full-Float Mounting System of a Commercial Vehicle Cab

基于动力学和有限元的方法,研究驾驶室全浮悬置系统正向开发流程。一方面,建立动力学模型,采用参数辨识的方法,设计性能参数;另一方面,利用中心点位移输入法,拟合可靠性试验场路谱,作为动力学模型输入,计算载荷谱,分析悬置支架的可靠性。台架扫频的模态测试和道路试验结果表明,动力学模型是准确的,开发流程是可行的。按照这套流程开发的悬置系统,既满足设计目标,又提高了设计效率和降低了开发费用。

Based on dynamics and finite element m e t h o d,the forward development procedure of a lull-floatcab mounting system is studied. O n one h a n d,a dynamics model is built and performance parameters are designedby means ol parameter identification; on the other h a n d,the road spectra of reliability proving ground are fitted asthe input to dynamics model to calculate load spectra and analyze the reliability of suspension bracket. The results ofmodal testing with frequency sweeping on test bench and road test demonstrate that the dynamics model is accurateand the development procedure is feasible. The suspension system developed with the procedure can meet the designobjective,while enhancing design efficiency and reducing development cost.