Title: The Analysis of Dimensional Nonlinear Static Wheel-rail Contact Stress and its Influential Factors
Abstract:Wheel-rail contact is the key issue in safe operation of the high-speed train.Researching on threedimensional nonlinear static wheel-rail contact stress and its influential factors is the key to solvi...Wheel-rail contact is the key issue in safe operation of the high-speed train.Researching on threedimensional nonlinear static wheel-rail contact stress and its influential factors is the key to solving these problems.By using finite element analysis software-ANSYS,a three-dimensional finite element model of wheel-rail and face to face contact element between the wheel-rails are set up.TB tapered tread and CHN60 steel rail are calculated according to static contact,and the effect of wheel weight and material model on the contact patch shape and area is analyzed.At the same time,the solutions are compared with Hertz theoretical solutions,then the effect of the average contact stress and wheel-rail Mises stress is analyzed.Furthermore,the elastic foundation is simulated by using a spring element with consideration of the influence of foundation stiffness on the static normal contact stress of wheel-rail.The results show that the contact patch area and shape of wheel-rail are the main influencing factors to contact stress of wheel-rail;the contact patch shape of wheel-rail is different from the elliptical contact patch in Hertz theory,and with the increase of wheel load,the gap in the contact patch area becomes greater gradually,resulting in a difference in the average contact stress of wheel-rail;the contact area of elastic material is smaller than that of elasticplastic material;the part between wheel contact inevitably appears plastic deformation;the normal contact stress decreases with the decrease of foundation stiffness,but excessively small foundation stiffness will increase ground deformation,which is harmful to long-term operation of the train.Read More
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot