Structure Research Of 80t General-purpose Gondola Carbody

General-purpose gondola car plays an important part in railway goods transport,and to improve the carrying capacity and reduce the weight of gondola car is beneficial in raising transport efficiency and reducing transport costs.On the premise of meeting the design requirements of static strength and fatigue strength, to realize the light of railway cars is the derection of structure research.According to the strength requirements of TB/T1335-1996,utilized linear and nonlinear Finite Element Analysis technology to analyze the static strength of the 80 t general-purpose gondola carbody under various load cases,to find out the parts where the strength was surplus.The static strength analysis of gondola carbody provided a reasonable basis for the lightweight design.the parametric model of gondola carbody was established by using the ANSYS Parametric Design Language.The analysis was accomplished with different design variables and expounded an optimized design scheme which with the thickness,geometrical size and relative position of the main member plate on the carbody as the design variables.With the lightest weight of gondola carbody as the objective function,considering several load cases,the gondola carbody was optimized under the strength and stiffness constraints.The stress spectra was derived by combining the static stresses under the fatigue load cases and load spectrum.The fatigue strength for the optimized carbody was verified with the method which was factual stress and the practical fatigue characteristic of a comparable component or part.The results showed that the static strength and fatigue strength of the 80t general-purpose gondola carbody could meet the standard requirements.The weight of the optimized carbody was reduced 10.9% and the optimization effect was obvious.