Structural Optimization And Fluid-Solid Interaction For 29m~3 Liquid Tank Container

In recent years, for the speed of rail transport accelerated, tank train receives strong external load, liquid sloshing problem is very prominent. Liquid sloshing and coupling problem become very important issues. Research on liquid sloshing in running tanker has very important significance for guaranteeing transport safety.Liquid-Solid coupling on the one hand may cause system instability, on the other hand container would generate significant additional dynamic stress, and even cause structural damage. Therefore it is necessary to conduct a detailed analysis for these issues. The main works have been finished as below:This article uses Two-way FSI method to analyze the load impact,researches on structure weight loss and shape optimization of the end tank, specific steps are divided into as following:(1) Simplify geometry. Simplify the model of tanker in HyperMesh, and provide favorable conditions for meshing.(2) Establish the finite element model. Use the HyperMesh and ICEM CFD software to mesh the structure of solid and fluid respectively.(3) Set the solid boundary. Set constraint conditions, analysis type and boundary conditions of the solid domain in HyperMesh, and add coupling surface command by hand.(4) Element morph. Establish morphing volume for both solid and fluid element in HyperMorph. Control the deformation of solid and fluid mesh by using handles. Save all the steps of the command in file, and automate the modification of the grid.(5) Set the fluid boundary. Set analysis type and boundary conditions of the fluid domain, coupling parameter, coupling surface data exchange etc.(6) Achieve One-way and Two-way Fluid-Solid interaction. Complete coupling simulation based on One-way and Two-way Fluid-Solid interaction in CFX. Compare results, less than the allowable stress.Provides conditions for optimization.(7) Optimized design of the tank. In this paper, set the thickness and shape of the ends of the tank as design factor, and the stress and quality of the tank as an output response. Complete experimental design. Establish an approximate model of the tank, select NSGA-Ⅱ as an optimization algorithm, complete optimization design. And validate the model optimized.The final result by changing the thickness and shape in both ends of the tank, reduces the weight of the tank by 8.9%.