Structural Strength Analysis Of The No.13 Coupler Based On Finite Element Method

Compared with road transport and air transport,railway transport has the advantages of lower cost and larger carrying capacity,which plays an important role in social and economic construction.The No.13 coupler is one of the most commonly used coupler models in China’s railway freight,and its use represents the current situation of the use of the coupler in China.With the further improvement of china’s railway transport load,the poor service environment of the coupler leads to the failure of the coupler in the operation of the truck.This seriously affects the development of China’s railway industry,therefore,the strength of the coupler has gradually been paid attention to by people.In this paper,the coupler body and yoke of the No.13 coupler as the research object,using Creo Metric to carry out 3D modeling of the coupler structure,the coupler is pre-processed by Hyper Mesh,through the finite element simulation software ANSYS to view the coupler body and yoke in the actual operating load conditions and standard load operating conditions of the calculation results,get the stress of the larger part and its stress value.According to the results of the analysis,the structural optimization of the stress concentration part of the coupler is carried out,the finite element analysis of the improved structure is continued,and the maximum stress value of the optimized hook under various operating conditions is reduced to varying degrees.Secondly,the load spectrum of the No.13 coupler is used,the nominal stress method is used and the fatigue life of the No.13 coupler body is predicted by using the nominal stress method and the linear fatigue cumulative injury theory,and the prediction result exceeds the prescribed end-of-life period of 25 years in use to meet the requirements of use.Finally,based on the results of the optimized static strength analysis,an optimized coupler is analyzed by using the ANSYS reliability design module,and the Monte Carlo method of Latin ultra-cubic sampling is selected.The maximum stress mean curve of coupler body is in good convergence state under 5000 stress cycles.The final calculation obtains the static strength reliability and the confidence of the results of the No.13 coupler body.