Optimum Structural Design And Experiment Research Of Subway Seats Based On Finite Element Analysis

With the rapid development of subway trains, the contradiction between subwaytrains industry and energy, environmental protection has become an outstanding problemwhich will limit the development of subway trains industry. Facing the enormouspressure that comes from the arrival of the era of low-carbon and energy saving,lightweight train is one of the most effective and realistic way to solve this problem. Withthe continuous development of CAE technology, the use of CAE technology not only cansave development time and design costs, but also can improve the design quality of theproduct.The paper aims at studying the subway seat structure optimization. Pro/Engineersoftware is used for solid modeling, and on this basis, the establishment method of finiteelement model and the principles of simplification are studied by combining with thestructural characteristics of the seat and the forces.Then use the powerful geometricInterface of ANSYS Workbench to connect the geometric model and put it into theenvironment, Finally, the appropriate cell type, mesh method and type of contact arechosen to establish a more complete finite element model of the seat. Then, the staticstrength of the seat model is analyzed based on the relevant provisions of EN12663, as aconsequence, the force and deformation of the seats in a typical condition is found andthe unreasonableness of the original design is also carried out.According to the results of finite element analysis and the evaluation criteria tooptimize the structure of the seat，the number of the seat frame and Connecting parts arereduced; Then the seat’s support frame structure was optimized. Compared to the originaldesign, the new design of the seat reduces weight by8%, and the strength meets therequirements.Finally, static strength test and fatigue test were conducted for the newly designedseats, then the stress and strain of the seat were obtained under static load. Through thestatic strength test, Comparing the experimental data and finite element analysis data, Theresults showed that both the error of about10%, so as to verify the correctness of the results of finite element analysis; the fatigue experimental results show that the fatiguestrength of seats meets the design requirements, and further illustrates the reliability ofthe seat structure and performance after optimized.This study provides a new design method for the design of subway seats based onFinite Element Analysis and Experimental verification, and also provides scientifictheoretical basis and practical basis for some other things, such as the design of otherstructures on the subway and the reduction of the total cost of the product, so, this studyis of strong practical significance and offers practical application value.