基于Fancher模型的钢板弹簧动刚度拟合精度研究

摘要

基于Fancher模型采用最小二乘算法实现了钢板弹簧动刚度拟合,仿真与试验对比结果表明,Fancher模型具有较高的拟合精度,能够较好地模拟钢板弹簧的迟滞特性.进一步基于不同组数和行程的试验结果进行拟合精度研究,结果表明,基于2组试验数据即能够实现高精度拟合.结合2组动刚度试验结果和Fancher模型,通过参数辨识即可获取钢板弹簧动刚度特性,能够达到显著降低试验成本、缩短试验周期的目的.%The dynamic stiffness of leaf spring was fitted based on the Fancher model through least squares algorithm.The comparison between simulation and test has revealed that the Fancher model could simulate the hysteresis characteristics of leaf spring with high fitting precision.The fitting precision research was carried out based on different groups and mileage,and the results indicated that the dynamic stiffness of leaf spring could be simulated with high precision by considering only two groups of test data.As a result,the dynamic model of leaf spring could be established by combining two groups of test data and parameter identification of Fancher model,which will lead to obvious cost and time reduction of test.