Study On Efficient Modeling Method Of Stainless Steel Spot Welding Truck And Optimization Of Solder Joint Layout

Since the beginning of the 21 st century,as China has completed the building of a moderately prosperous society in an all-round way,the rail transit industry has kept pace with rapid development,providing a strong guarantee for the safety and convenience of the people’s travel.With the continuous development of computer technology in China,CAE technology has been applied to the design and research of railway vehicles in China.Taking a stainless steel spot welding vehicle as the research object,this paper uses TCL/TK programming language to redevelop Hyper Mesh,automates and quantifies part of pre-processing functions,so as to realize efficient modeling of vehicle body.After the completion of the finite element modeling of the car body,the performance simulation analysis and solder joint layout optimization research were carried out on the car body.The main research contents are as follows:(1)This paper mainly studies a stainless steel spot welded car body.According to the structure of the car body,the finite element modeling principle of the car body and the general process,the efficient modeling method of the car body is studied.Through the research,it is found that the secondary development of four commonly used pre-processing functions in Hyper Mesh software based on Tcl \ Tk language can effectively improve the efficiency of vehicle body modeling.(2)Based on TCL/TK language and Hyper Mesh software API function,through the design of relatively complex logical nested relationship,to complete the automatic creation of components,batch surface processing,automatic geometric cleaning,batch solder joint processing four kinds of pre-processing functions and human-computer interaction graphical interface secondary development.After the script was written,the test model was applied in the finite element modeling of the car body.By comparing with the traditional manual modeling,the pre-processing secondary development tool for four commonly used pre-processing functions effectively improved the modeling efficiency and realized the goal of efficient vehicle body modeling.(3)Based on JIS E7106-2006 standard and BSEN 15085-3-2007 standard,by applying16 kinds of vehicle body calculation conditions and boundary conditions,the vehicle body stiffness and static strength of the solder joint were simulated and analyzed.The calculated results were compared with relevant standards and evaluated,and the related performance of the vehicle body met the requirements of the standard.(4)According to the solder joint topology optimization theory,determine the relevant optimization parameters and the solder joint optimization process.After optimization simulation analysis,the solder joint optimization results and the corresponding solder joint layout plan are obtained.After comparing the static strength of the car body and the static strength of the solder joint before and after optimization,the solder joint layout plan corresponding to the upper limit of the volume fraction of 50% is the relative optimal plan.