Strength, Buckling And Fatigue Strength Of Researching On Stainless Steel Bodywork Of Type A Metro

The stainless steel metro has been increasingly used in China cities, because of stainless steel has a lightweight, good corrosion resistance, wear resistance and high strength characteristics。A-type stainless steel spot welding structure of the body is in accordance with lightweight design, and its strength, stability and fatigue properties use the highest international standard。Therefore, its reliability, stability and fatigue resistance, etc. has become more important。Taking a subway car body of stainless steel welding structure of A-type as the research object, use the computer simulation technology to the body for performance simulation in the body of the design phase. The details are as follows:First of all, according to the geometric model of the stainless steel body, provided by the factory, and car body welding drawing, establish the mechanical model for the simulation study。Determine the ultimate strength analysis of the 8 body loading conditions based on the"EN 12663-2000 Railway applications-Structural requirements of railway vehicle body, standard and combining the computing tasks provided by the factory, analyze the calculated results of the 8 body loading conditions, and make recommendations for improvement。Secondly, apply the ANSYS software to do the modal analysis of the steel body and the body under the preparation, obtain the first torsion frequency and the first vertical bending natural frequency, and compare the results。Then, based on the linear buckling theory, to do the stability analysis of the body's original scheme under the coupler compression force, which is 1500KN, to improve the program the 3 times in the parts, whose buckling factors is less than 1.0, such as the floor in the front of body, corrugated floor in the pillow and so on, based on the results, recommendations for improvement of the body, eventually make the design meet the requirements of the body。Finally, basing on the BS7608-1993 standard, and according to the fatigue-task supplied by factories, determine the vertical load case 1, lateral load cases, longitudinal and vertical load case 2, four kinds of fatigue loading conditions, to analyze the fatigue strength of the body of base metal, corner welding, spot welding, and calculate the cumulative damage ratio, the results show that:the fatigue strength of various parts of the body are to meet the design requirements。...