Static And Dynamic Characteristics Analysis And Optimization Of A Flatcar

Based on a company's Hongkong flatcar,firstly summarizes the main functions,features and the development status of domestic and foreign railway flatcar.Hongkong flatcar can ship in two for a 20 t container,or a 40 t container,requires using the common two axle bogie,the structural strength of the main components of the car body must comply with the "railway vehicle strength design and test evaluation standard"(TB/ T1335-1996)requirements.According to the characteristics of Hongkong car body,this Paper uses ANSYS workbench software,establish the model of the carbody which is made of steel structure.According to the "standard" requirement,check on the car body,including the car body,s deformation on the vertical static load condition;car body,s deformation on the first compress or tensile conditions;the strength of the second compress condition,analyse the strength and stiffness of car body on different conditions.The results show that the strength and stiffness values of the car body meet the "standard" requirements,In the first and second working conditions,the stress is larger in the front or rear plate seats.In order to study the dynamic characteristics of car body,we have to analyse the modal of the car body and get the first 14 order vibration modes and vibration frequency?The results show that the first vertical bending frequency of the car body is 18.585 Hz,and on the basis,we also do the harmonic response analysis,which can avoid the resonance with the external incentives.The model of brake lever was established in ANSYS workbench,according to the transfer process,the braking rate and the braking ratio of the force on the brake lever,obtained and analyzed the strength and stiffness nephogram of the brake lever.The results show that the strength and stiffness of the brake lever meet the requirements.Under the premise of the strength and stiffness of the brake lever to meet the requirements,the design optimization is carried out,and the optimizeddesign variables are rounded and get the final result.The results show that the maximum stress,the maximum deformation and the fatigue life of the brake lever are basically unchanged.The quality of the brake lever is reduced by 0.913 kg,which is reduced by 6.166%,realized the goal of lightweight.