磁浮列车救援轮胎设计及其温度场分析

Rescue Tire Design and Temperature Field Analysis of Maglev Train

文章根据磁浮列车的接口需求设计了其紧急情况下的救援轮胎。首先,对其进行了静负荷分析、稳态滚动分析;提取轮胎橡胶材料的应力场及应变场数据后,编写程序计算生热率;再通过编写子程序导入生热率并赋予各个单元,设定热边界条件,经热传导计算得到轮胎温度场。计算得到该轮胎在充压2.3 MPa、负荷1.0 t、行驶速度70 km/h、环境温度为25℃时的最高温度为93.77℃,出现在胎肩部位;通过计算不同速度下的轮胎温度场,发现轮胎最高温度随行驶速度近似线性增大。

The article describes a rescue tire designed for emergency situations according to the interface requirements of maglev trains.Firstly,static load and steady rolling analyses were carried out.After extracting the stress field and strain field data of the tire's rubber material,a program was written to calculate the heat generation rate;then the heat generation rate was imported and given to each unit by writing a subroutine to set the thermal boundary conditions,and the temperature field of the tire was obtained by heat conduction calculation.The maximum temperature of the tire is 93.77℃,which occurs in the shoulder area,when the tire is filled with a pressure of 2.3 MPa,loaded with 1.0 t,and driven at 70 km/h at an ambient temperature of 25℃.By calculating the temperature field of the tire at different speeds,it is found that the maximum temperature of the tire increases approximately linearly with the driving speed.