Structural Analysis And Optimization Of The Water Tank Based On The Flow-solid Interaction

Lifting the tank as indispensable storage equipment in railway passenger cars,is an important part of a travel to improve passenger comfort.Railway train industry after the overall acceleration in our country,the train will exist in the normal operation of the work to accelerate and brake operation,the speed of fast change results in a liquid sloshing in the tank body impact more clearly,make the parts under the impact load of lifting water tank also increasing,the rationality of the design of the structure will be related to the safe operation of the train,so it is necessary for lifting tank structure strength analysis and optimization,the result has guiding significance for optimization design of the tank.Based on the theory of static strength,the theory of flow-solid coupling and the theory of finite element,this paper uses Ansys Workbench finite element analysis platform to analyze the strength core and transient analysis of each part of the water tank respectively.This paper analyzes the effect of liquid shaking in the water tank on the structure of the lifting water tank under different operating conditions of the train,and optimizes the structural parameters of the anti-wave plate in the lifting tank according to the results of the analysis,so as to reduce the maximum equal effect force on the parts of the lifting tank.First of all,the composition and working principle of the hanging water tank structure are analyzed,the model is simplified by numerical simulation method,and the strength verification of the lifting structure,connecting bolts,tank body and anti-wave plate is completed,and its structural reliability is proved by calculation.Secondly,based on the theory of flow-solid coupling,the transient analysis of the suspended water tank is carried out,and the structure of the lifting tank is transiently analyzed in different structural characteristics,fill ratio and acceleration direction,and according to the results of the analysis and comparison,it can be seen that the parts of the lifting tank are subjected to the maximum stress and displacement when the double anti-wave plate,90%charge ratio and Y-axis forward acceleration.Finally,in order to reduce the maximum stress on the structure of the lifting tank as the optimization goal,the thickness of the water tank anti-wave plate and hole diameter are optimized,and according to the variables involved in the optimization,the finite element model is re-established,the simulation calculation is carried out again,and the validity of the optimization is verified by using the calculation results.According to the analysis of the optimization results,it can be seen that the stress of the anti-wave plate is reduced by 9.83%,the stress of the tank body is reduced by 14.63%,the stress of the lifting structure is reduced by 14.67%,and the maximum stress of the parts of the water tank is reduced,which achieves the goal of improving the reliability of the lifting tank.