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Analysis on computation accuracy of nonlinear stiffness performance curve for large-deformation rubber stopper of high-speed train

LIU Jianxun1,HUANG Youjian1,Zhang Yaxin1,HOU Zhichao2(1.Zhuzhou times new material technolgoy Co.,Ltd.,Zhuzhou 412007,Hunan,China;2.Automotive Engineering Department,Tsinghua University,Beijing 100084,China)  
As to the large error between the experiment results and the static stiffness performance curve obtained by finite element analysis for the rubber stopper of a high-speed train,the reason about the error is analyzed by combining experiment and analysis,and the idea of the optimization analysis is proposed from three aspects,including experiment scheme,constructive model selection and contact definition.The analysis and the experiment result indicate that some effective measures should be taken to ensure the compliance of analysis result with the actual conditions,i.e.,test condition should satisfy the quasi-static assumption,the constructive model should include the high-pressure and volume compression effect,and the contact definition should be consistent with the real contact state of rubber.The measures provide some references for the analysis of nonlinear stiffness performance curve of the similar rubber stopper.
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