Performance Simulation Analysis Of Power Crew Train Body

Spot-welding has been widely applied in the connection of body sheet metal for vehicles such as subway, light rail, generator car, high speed multiple and so on. which is economic, fast, efficient, etc. Urban rail vehicles mainly use stainless steel body because it’s lightweight. corrosion resistant, high temperature resistant and environment-friendly with low maintenance, low cost and long life cycle. We establish the geometric model and the finite element model of the power crew train based on the relative theories and methods, and carry on the FEM analysis of the body performance. The main contents are as follows:(1) We establish the the geometric model and the finite element model using Hype(1) rmesh based on the relative CAD drawings and the point-force transmission characteristics of spot-welding train, summarize the FEM methods of the body including the welding spots, and then introduce the data transmission among CAD/CAE softwares.(2) According to the static and dynamic design loads and the task statement in the EN12663-2000standard, we definite eight load conditions to conduct stiffness and static strength analysis on the body, and carry on structure optimum design for the weak body parts to meet the strength requirements.(3) According to the design loads and the task statement in the EN12663-2000standard, we definite three fatigue load conditions to conduct fatigue strength analysis on the body, and evaluate the fatigue strength of raw material and weld seam based on Britain BS7608:1993standard. The body can meet the fatigue strength requirements if the cumulative damage ratio is less than one.(4) According to the modal analysis theory, we conduct modal analysis on the body steel structures and the body in the preparedness state using the Lanczos method of ANSYS to get the first-order vertical bending and the first-order torsion natural frequency of the body, and make a comparative analysis and evaluation.