轻卡前板簧悬架刚度非线性行为研究

Research on Wheel Rate Nonlinear Behavior of Light Truck

以轻卡少片簧前悬系统为研究对象,系统地探讨了板簧悬架安装几何参数及连接处衬套刚度对系统级悬架刚度非线性行为的影响。研究过程首先基于零部件级板簧测试及Adams仿真手段研究板簧自身结构刚度的线性行为,且证明了由Adams建立的虚拟板簧结构的可靠性。然后,基于系统级K&C测试及Adams仿真结果的对标分析,认识到悬架刚度的非线性行为,且证明Adams建立的悬架模型的准确性。最后,利用Adams前悬虚拟仿真的方法研究了悬架吊耳角度、吊耳长度、板簧安装中心距及衬套刚度对悬架刚度非线性行为的影响。此外,本文获得的板簧悬架刚度非线性行为的规律性认识可优化指导前期板簧悬架系统的开发工作。

Taking the light truck with less leaf spring front suspension system as the research object,the effects of the leaf spring suspension installation geometric parameters and the joint bushing stiffness on the nonlinear behavior of the suspension stiffness are systematically discussed.First the linear behavior of the leaf spring structural stiffness on the component-level was studied based on leaf spring testing and Adams simulation,and the reliability of the virtual leaf spring structure established by Adams was proved.Then the nonlinear behavior of the suspension stiffness was recognized,and the accuracy of the suspension model es⁃tablished by Adams was proved based on the system-level K&C test and the benchmarking analysis of Adams simulation results.Finally,the effects of suspension lug angle,lug length,leaf spring installation distance and bushing stiffness on the nonlinear behavior of suspension stiffness were studied by using Adams virtual simulation method of the front leaf spring suspension.In addi⁃tion,the regularity of the nonlinear behavior of the leaf spring suspension stiffness obtained in this paper can optimize and guide the development early work of the leaf spring suspension system.