The Crh Lateral Stopping Block Absorber Finite Element Simulation And Performance Prediction Research

Thanks to its excellent performance of vibration isolation and damping,the use of rubber damping products becomes more and more wide,due to the nonlinear characteristics of rubber materials,the research of rubber materials mechanics behavior is not easy.As the development of the finite element analysis technology,the problem has the feasible solutions,aiming at the application of finite element analysis technology in rubber products design,this paper takes the CRH lateral stopping block rubber shock absorber as the research object,the research content is as follows:Describe the establishment of the finite element analysis model for rubber shock absorber in detail.Various problems in the process of model establishment and main influencing factors were studied.Analyze stress and strain energy density of the damper under different path and different vertical displacement,and expound their characterization,the similarity and difference among them.Although the Mises stress and the strain energy density ESEDEN both can characterize material how easy to damage,it need according to the actual situation to choose stress or strain energy density analysis to solve the problem flexibility.Shock absorber for the modal analysis,obtains the first order natural frequency of the vibration mode,its dynamic performance has characterized preliminarily.Simulation analysis under different temperature,analyze the static characteristics of shock absorber,its static stiffness,and the changing rule of the stress and strain energy density.Find the performance of shock absorber has big difference between used under 25? and 45?,and comparing their used under 45? and 65?,the performance difference is small.Using the Arrhenius equation to predict the parameters of the damper material in different years and at different temperatures using the same year,use the predicted material parameters,the finite element static simulation was carried out on the shock absorber after 0-9 years of service life,analysis of the static stiffness,stress and strain energy density,it is concluded that during this period of time,the performance of the shock absorber parameters compared with the new shock absorber,although the decline year by year,but the descent is dropped steadily year by year,there was no bluff type or decrease significantly accelerated decline.Use the predicted material parameters,conduct the finite element static analysis of the shock absorber after 2 years of use at high temperature and low temperature,compare the results found that increment of 10? can significantly accelerate the aging rate of rubber.Using dosage of accelerator TBBS as variables,conduct the shock absorber products for regular rubber formulation experiment and finite element analysis,compare the results of the analysis,think the good mechanics performance simple in rubber formulation experiment,are not necessarily also has obvious advantages in the product,combined with conventional formula experiment and finite element analysis can improve the efficiency of rubber products research and development.