The Study Of The Influence Of Composite Rubber Suspension On Heavy Vehicle Ride Comfort

In recent years, more and more people pay attention to handling stability, ride comfort and low noise. The trend of the design for heavy vehicle appears to be light-weight and low-cost, and suspension system has decisive influence on ride performance, therefore, how to select suspension stiffness and damper so as to ensure good ride comfort of the heavy truck is an important topic in vehicle chassis design and development. The composite rubber suspension is composed of leaf spring and rubber spring, which has the characteristics such as strong bearing, variable stiffness, flexible guidance and strong adaptiveness. Besides, the variable stiffness characteristic makes it that the ride comfort and performance can be greatly improved by self-adjusting.This paper takes an semi-trailer truck6×4as study object, and finite element analysis (FEA) of the composite suspension is carried out based on Hypermesh software, and then the multi-body dynamics model of the composite suspension is established, so as to achieve the stiffness optimization and matching.(1) The FEA of the grid model of composite rubber suspension is carried out in the use of the FEA software which called Hypermesh. The analysis gains the changes of stress and deformation of the composite rubber suspension under the fixed load, and then the nonlinear contact process of the secondary spring are simulated; moreover, the equivalent stiffness of the composite rubber suspension is calculated.(2) According to the stiffness parameters by finite element calculation, the virtual prototype model of the composite rubber suspension and the heavy truck is established, and the main resonant frequencies of the semi-trailer truck6×4are simulated and calculated based on the dynamical simulation software ADAMS. Furthermore, the acceleration response vibration characteristics is analyzed under the condition that the truck drives on road level D with full load in frequency-domain, and then the optimum stiffness parameters for the composite suspension system are gained by using the proposed ride evaluation index, which promotes and improves the heavy vehicle’s ride comfort.Finally, the remained research work of the heavy truck’s ride comfort is also pointed out.