Research On Optimization Of Rubber Bushing With Parametric Finite Element Method

With the rapid development of industry,vibration and noise reduction has become a very important issue,if not handled properly,it will bring great distress to people's lives.At the same time,it will reduce the operation accuracy in the project,shorten the product life and endanger the safety,etc.The construction and operation of the urban rail transit and the operation of the train are also facing the impact of vibration.The characteristics of high elastic state and high viscosity state of rubber make the application of rubber components in urban rail transit very extensive.In this paper,the rubber bushing is mainly studied from the following three aspects:(1)Material parameters: Young's modulus E and Poisson's ratio ? of the steel ? rubber parameters10 C ?01C;(2)Structure parameters: rubber thickness,rubber free end face structure;(3)Technological parameter: pre-compression these three aspects to make a parametric finite element analysis of rubber bushing.Then through the stiffness and sensitivity analysis to find the sensitivity parameters and make a optimization.The main contents of this paper include:1.The research progress of the hyperelastic constitutive model of rubber and optimization of Rubber Bushing are briefly reviewed.The application of numerical simulation in the design and development of rubber parts is also described.The experimental data of uniaxial stretch,biaxial stretch and plane stretch these three mechanical behaviors of rubber standard sample can be used as references to analyze some common elastic constitutive models.And based on this to discuss if different models have different constitutive behaviors.2.Describing the numerical simulation equation of rubber large deformation.And according to the formula of rubber large deformation,we know that it's very complex and difficult to complete the design of the rubber element,especially the irregular rubber parts.Therefore,this paper is based on ABAQUS platform,using the finite element method to simulate the rubber bushing.Then search the sensitive parameters based on sensitivity analysis.After that we can use the numerical simulation method to make sensitivity analysis of material parameters,structure parameters and technological parameters of rubber bushing.The parameters of the rubber bushing can be optimized after the sensitive parameters are obtained.3.By the sensitivity analysis of the rubber bushing we know that rubber thickness,rubber free end face structure and pre-compression are the sensitive parameters.The last two can be analyzed through the effect of maximum logarithmic principal strain,and with the relationship between the fatigue life and the maximum principal strain,we can propse an optimization project based on those.Then through the calculation of deformation rate,which are radial force,axial force and torsion torque,will we know that the influence of the rubber thickness on the rubber bushing's different stiffness is radial(29)axial ? torsional.So we maily start from the radial stiffness,by using the parametric finite element method and satisfying the design requirements of stiffness,and regard the stiffness matching as the optimization goal,then establish the optimization mathematical model.Last we take advantage of the general global optimization algorithm to gain the most appropriate rubber thickness.