Numerical Simulation of Thermal-Mechanical Coupled Process in Train Braking
|School||Dalian Railway Institute|
|Keywords||Tread brake Disk brake Thermal - mechanical coupling Dynamic contact Finite Element|
China 's railway sector in order to meet the new century and a new economic era , the ambitious goals of the proposed high-speed heavy \Whether high-speed or overloading , \The brake problem is not resolved , even with the high quality of the line , with great power traction power , high-speed or overloaded or impossible to achieve . Destruction in the form of running train brakes of wheelflats and brake disc cracks , seriously affect the quality of operation . Braking process in a non- coupled multiple physical field analysis of a component of the braking device . However, due to the the the train braking process is the braking force generated by the interaction between the various components of the braking device , is related to the large rotation dynamic contact thermal - mechanical coupling complex issues , so research must brake problem consider the role of the strong coupling between the various components of the contact and the temperature field and displacement field . Part of the railway rolling stock virtual prototyping system \tread braking and braking of the main components of the multi- body contact disc-shaped model , which is described by analytic methods , that NURB curve described by the Gaussian surface contact area , define the initial velocity of the user subroutine written in Fortran , the first time thermal - mechanical coupling of the two braking process numerical simulation quantitatively the main brake components in different initial velocity , each time under a different braking force speed , stress , and temperature variation for the study of the wheels , brake shoe and brake disc life provides a theoretical basis . Due to the complexity of the research problem in computer hardware , only the initial stage of the braking process numerical simulation . If the hardware condition is good enough to be able to brake whole process of the entire brake device effective simulation .