列车制动闸片接触界面接触压力分布研究

摘要

以列车盘式制动器为研究对象,建立一个三维瞬态热-结构耦合模型,利用有限元软件ABAQUS非线性多物理场耦合方法,数值模拟了制动过程,发现制动闸片上的温度场和接触应力场在接触界面呈不均匀分布,并且在每个闸块上二者存在着相互耦合的关系,温度高的区域由于热变形大、接触面积小,导致接触压力较高.此外,接触压力在制动过程中的变化还与摩擦力、减速移动热源有关.%It establishes the model for 3d transient thermal-structure coupling on the basis of brake disc of train.By using the finite element software ABAQUS,it simulates the braking process.The temperature field and contact stress field's distribution are not uniform on the contact face of the brake pad and they are coupled in each block.The higher temperature region which has larger thermal deformation leads to smaller contact area and higher contact pressure.The contact pressure is also related with friction and slow moving heat source in the braking process.