典型制动条件下货车车轮温度场和热应力场的有限元仿真  

Finite Element Simulation of the Temperature Field and Thermal Stress Field of a Freight Wheel under Typical Braking Conditions

作　　者：郑红霞[1] 刘玉军[1] 张全忠[1] 谢基龙[2] 

机构地区：[1]鲁东大学交通学院先进制造与自动化技术重点实验室,烟台264025 [2]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《机械科学与技术》2009年第4期500-504,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：铁道部科技发展计划项目(2005J025)资助

摘　　要：根据车辆的运行情况,确定车轮的典型制动载荷条件;采用摩擦功率法建立了制动过程的热量输入方法,运用有限元分析软件ANSYS,数值模拟了典型制动工况下温度场的分布。采用双线形随动强化弹塑性模型,通过间接耦合法将温度场的模拟结果作为应力场分析的边界条件,数值模拟了典型制动工况下车轮辐板孔边的热应力场分布规律,并与试验结果相比较,验证了仿真结果的有效性。以上分析结果为车轮疲劳强度评定和疲劳寿命估算提供了载荷条件。We first defined the braking parameters of the typical braking conditions according to the freight train operation conditions, derived the thermal input during the braking course by the method of friction power and simulated the temperature field under the typical braking thermal load conditions with the finite element software of ANSYS. Then, based on the temperature field simulation results, we simulated the thermal stress under three typical braking conditions with the bilinear following strengthening elastic-plastic model and the indirect coupling method. Finally, we compared the simulation result with the test result to validate the simulation result. Comparisons show good agreement between the simulation result and the test result, thus, the simulation results can be used as the load conditions for evaluating the fatigue strength and predicting the fatigue life.

关 键 词：货车 车轮 温度场 热应力场 有限元法 

分 类 号：U26[机械工程—车辆工程]