用于平顺性仿真的七自由度非线性模型

Seven degree of freedom nonlinear model for ride comfort simulation

为了解决传统平顺性振动模型对悬架非线性环节描述不足的问题,开发了一个用于平顺性仿真的七自由度非线性时域模型.此模型以线性七自由度模型为基础,通过对悬架迟滞非线性和减振器非线性的准确建模,实现悬架非线性特性的准确描述.通过典型工况仿真,验证所建模型能够更为真实的描述悬架非线性环节对平顺性的恶化现象,进一步提升了平顺性模型的仿真精度.利用所建模型对影响平顺性的典型因素进行仿真研究,研究结果表明可以通过降低悬架刚度、合理匹配减振器阻尼等措施来提升平顺性.

The current ride comfort model does not have the ability to accurate simulate the suspension nonlinear.In order to solve this problem,a seven degree of freedom nonlinear model for ride comfort simulation, was developed.This model was based on seven degree of freedom linear model,through accurate modeling of suspension nonlinear hysteresis and damper nonlinear,to accurately describe suspension nonlinear characteristics. Through the simulation of typical operating conditions,to verify the model have the ability to really describe ride comfort deterioration caused by the suspension nonlinear factor,to further improve the simulation accuracy of ride comfort model.Conduct simulation study about the key factors of ride comfort,the research results show that,it is can improve the ride comfort by reducing suspension stiffness and reasonable matching damping.