Finite Element Analysis And Experimental Research On Static Stiffness Of Rubber Bushing

With the continuous improvement of the level of China's automotive industry,automotive users are increasingly demanding on vehicle operation performance,the main engine manufacturers are also increasingly concerned about the vehicle NVH problem.Rubber bushing,as a key component of vibration and noise reduction,has been widely used in various systems of the whole vehicle.Foreign Research and development of rubber bushing started early,with a full set of mature experience in the development and design of rubber bushing,while domestic vehicle technology started late,and some key components were mainly imported,at the same time,there is no mature theoretical support for the design and development of rubber bushing,so the research of rubber bushing has practical use value and engineering significance.This article describes the development of automobile rubber bushings and discusses the current research status of rubber bushings at home and abroad.Taking a heavy truck cab suspension rubber bushing as the research object,the development and design process of the rubber bushing is described in detail: customer parameter input,bushing outline size design,skeleton and rubber material selection,finite element analysis and structural design finalization,Internal test and road test of the vehicle.Hyper Mesh and Abaqus software were used to simulate the relationship between the dimensions and static stiffness of the three-skeleton rubber bushing,and the structure design of the rubber bushing was finalized based on this.In the process of finite element analysis,the superelastic constant of rubber was fitted through uniaxial tensile experiment data,and the finite element analysis model of rubber bushing was established.The Mooney-Rivlin model was used to study the calculation of rubber bushing under medium and small deformations.The accuracy of the static stiffness value.In addition,the finite element calculation value and experimental value of the static stiffness of the rubber bushing are compared and verified through bench experiments.The results show that the deviation between the finite element calculation value and the experimental value of the static stiffness is within 10%,which meets the design requirements of the rubber bushing.Finally,the fatigue performance of the rubber bushing was verified through the road test of the whole vehicle.This project has completed the structural design,finite element analysis and experimental research of a rubber bushing for a heavy truck cab suspension,and initially established the design and development process of the rubber bushing,which provides a reference for the development of the rubber bushing.The method of combining finite element simulation analysis and experiment can effectively shorten the development cycle of rubber bushings,reduce the development cost required for repeated verification in the initial development stage,and has a broad application prospect.