基于程序的悬架衬套动力学特性参数识别与应用研究

Research on Dynamic Characteristic Parameter Identification and Application of Suspension Bushing Based on Program

以橡胶衬套为研究对象,介绍了一种非线性的仿真方法。利用FORTRAN语言对ADAMS中的GFOSUB文件进行编写,包括零部件的数学模型、参数识别、控制结构、循环结构。在ADAMS进行力学特性仿真时用GFOSUB文件代替橡胶衬套进行仿真试验。同时,利用FOR-TRAN语言编写了非线性橡胶衬套数学模型函数。在ADAMS中进行四台柱平顺性仿真试验对比。结果表明:非线性数学模型加速度幅值比线性降低5%~10%,频域峰值靠前0.5~2 Hz,更贴切实际情况。证明了悬架衬套的动力学特性对车辆平顺性能有着至关重要的作用。

A non-linear simulation method for rubber bushing is introduced.Researchers can use FORTRAN language to write GFOSUB documents in the ADAMS,including mathematical models of components,parameter identification,control structure,loop structure.The simulation test was carried out with the GFOSUB file instead of the rubber bushing in the simulation of the mechanical properties of the ADAMS.At the same time,the mathematical model function of nonlinear rubber bushing can be written in FORTRAN language.Finally,a comparison is made in the simulation test of the smoothness of four columns in the ADAMS.The results show that the acceleration amplitude of the nonlinear mathematical model is 5%~10%lower than that of the linear model.It can be seen in the frequency domain diagram thatthe frequency peak of nonlinear model is 0.5~2 Hz higher than that of linear model.Finally,it is proved that the dynamic characteristics of suspension bushing play an important role in vehicle ride comfort.