The NVH performance of a vehicle is an important criterion for evaluating whether the vehicle is comfortable or not. It gives the driver the most intuitive feeling. When a car is running, the vibration caused by uneven road surface is transmitted to the whole vehicle through the wheels. Rubber components are widely used in the automotive industry, especially in parts requiring vibration reduction, noise reduction and protection of important components. The suspension system and automobile powertrain mounting system are the two most critical parts. Whether in a suspension system or in automotive powertrain mounting system, rubber bushing is the most important part of automotive vibration and noise reduction system, so the research of rubber bushing is very important. When studying this kind of problem, the more suitable method is the finite element analysis method. Nowadays, computer technology is unprecedentedly developed, and there are many finite element analysis software.
In this paper, the application of rubber components in asuspension system and powertrain suspension system of automobiles and the characteristics of rubber materials, such as viscoelasticity, are described. The research situation of rubber bushing at home and abroad are described in detail.
Then it introduces the origin and development of the finite element method and the research situation of finite element method at home and abroad. Then it introduces the development history and types of finite element software, focusing on the functions and analysis process of ANSYS.
Finally, ANSYS is used to simulate the static stiffness of rubber bushing, and the finite element model of rubber bushing is established. Then the boundary conditions are set up and the stiffness analysis simulation experiment is carried out to simulate the stress of rubber bushing. The stiffness change of rubber bushing is explored when the force or load in six directions is loaded on the rubber bushing. The deformation of rubber bushing subjected to x, y, z axial and torsional forces are analyzed, and the data are recorded in the simulation, and the relevant curves are drawn. According to the function relationship expressed in the graph, the static stiffness of rubber bushing can be expressed.
Keywords：Rubber bushing，Finite Element Analysis，suspension system，Static stiffness