悬架动态K&C试验典型激励谱的编制研究

STUDY ON THE COMPILATION OF TYPICAL EXCITATION SPECTRUM OF SUSPENSION DYNAMIC K&C TEST

传统的准静态K&C特性试验加载频率较低,不能全面有效地反映出由减振器阻尼及衬套黏弹性等引起的悬架系统力学特性的滞后效应,而悬架动态K&C特性试验能够弥补准静态特性试验的不足。动态K&C试验的开发涉及到激励谱和性能评价两方面的研究内容,以某A级轿车为研究载体,通过某试车场道路载荷谱采集试验及仿真分析,经过台架试验迭代,设计了悬架动态K&C特性试验的典型激励谱,并通过台架试验与虚拟试验验证了其有效性。研究表明,应用所设计的典型激励谱进行试验,可以有效地反映出悬架的动态特性,为车轮定位参数的研究以及K&C试验技术的开发提供一定的支持。

The traditional quasi-static K&C characteristic test can not reflect the hysteresis effect caused by shock absorber damping and bushing viscoelasticity comprehensively and effectively, but the suspension dynamic K&C characteristic test can make up the deficiency of the quasi-static characteristic test.Development of dynamic K&C test involves two aspects of excitation spectrum and performance evaluation of the research content, in this paper, A class A sedan for the study of the carrier, through A skid pad road load spectrum sampling test and simulation analysis, through the bench test iterations, designed the suspension K&C dynamic characteristic test of typical excitation spectrum, and its validity is verified by bench test and virtual test.The results show that the dynamic characteristics of the suspension can be reflected effectively by using the typical excitation spectrum designed in this paper, which provides some support for the research of wheel positioning parameters and the development of K&C test technology.