Strength And Modal Analysis Of Stainless Steel Car Body Of Metro Vehicles

Based on the comparative analysis of the stiffness,static strength and mode of the stainless steel body of the metro head car,this paper builds the 3D model of the metro head car body in combination with the actual situation,divides the grid [1],and conducts finite element modeling and stress balance analysis of the important parts of the car body.The results show that,on the whole,such a car body can meet the requirements of fatigue strength.Through reasoning and reasoning to the design requirements of the relevant performance,the stainless steel metro car products can meet the requirements.Second,as far as the lowest frequency mode is concerned,the lowest mode frequency of the reconditioning model possessed by such a vehicle body is lower than that of the first-order vertical bending mode frequency(9.4Hz).This frequency value will not induce the resonance between the stainless steel body and the bogie.Third,the static strength of the structure of key parts of the vehicle body meets the requirements of relevant national standards under various working conditions.With the help of the calculation of the comprehensive strength,it can be known that the high stress areas of the car body are mainly concentrated in the upper Angle of the doorpost,window Angle,the post of the pillow beam,the opening of the pillow beam web and so on.Fourth,under the maximum vertical load,the static deflection is less than 1‰ of the distance between the supporting points of two bogies.It is proved that the rigidity of the car meets the requirements.In the method of performance evaluation and body modeling of stainless steel subway vehicles,the design of body weight and basic parameters as well as the geometric modeling of the body are presented in this paper.On this basis,this paper has carried on the grid division,the finite element model data unit and the coordinate system as well as the vehicle body material parameter setting,and carried on the specific performance evaluation of the vehicle.The simulation analysis of the stiffness and static strength of the vehicle body,the modal simulation analysis of the stainless steel subway vehicle body and thefatigue strength simulation analysis are also carried out in this paper,which lays a foundation for the vehicle performance evaluation.This paper discusses the basic principle of BS standard,the working condition of the fatigue strength assessment load and the fatigue assessment standard,and expounds the fatigue strength assessment including equipment hanging point and vehicle body fatigue.In this paper,a three-dimensional model grid of the stainless steel body is created,and the strength and stiffness analysis of the stainless steel body is carried out.A number of working conditions are applied,and the model of working conditions is imported into ANSYS to calculate whether the maximum stress of the body is less than the allowable stress.The modal resonance of the vehicle is compared and calculated.Applied longitudinal,transverse and vertical vibration conditions,the verification of weld fatigue life is in line with the service life and complete the bunt car vehicle comprehensive dimension of the whole process of the finite element analysis,make the validation stainless steel metro vehicle bodywork modal,static strength,stiffness,and fatigue strength of multidimensional analysis becomes more convenient,easy,accurate,fast and flexible,papers on the above analysis of the subway car head stainless steel car body,effectively solve the analysis of the stainless steel metro vehicle bodywork product performance validation problems.It lays a foundation for its reliability,stability and safety,and also provides a necessary reference for the stiffness,strength and modal analysis design of similar products,which has certain reference significance.