制动盘摩擦环厚度对其热容量和热应力的影响

Influence of Thickness of Friction Ring on Thermal Capacity and Thermal Stress of Brake Disc

为研究摩擦环厚度对新型城际动车组铸钢制动盘热容量和热应力的影响,基于ANSYS有限元分析软件,建立制动盘循环对称三维瞬态模型。采用间接耦合方法,仿真计算列车速度为300km/h时,厚度对制动盘温度场和应力场的影响。仿真结果表明:摩擦环初始厚度为23mm时,制动盘盘面最高温度为331.01℃,热应力为324.26MPa;摩擦环厚度降低5mm时,盘面温度升高约8.24%,热应力提升约12.82%;厚度对应力场的影响高于对温度场的影响,且厚度与二者呈线性关系。此结果可为制动盘后续寿命预测与检修提供参考。

In order to study the effect of friction ring thickness on the thermal capacity and thermal stress of cast steel brake discs equipped on new intercity EMU,in this paper,a three dimensional transient model of brake disc was established based on ANSYS software.The influence of friction ring thickness on the temperature field and stress field of the brake disc was simulated under the condition of 300 km/h operating speed,using indirect coupling method.The results show that at 23 mm initial thickness of the friction ring,the maximum surface temperature of the brake disc is 333.01℃,and the thermal stress is 324.26 MPa.With the decrease of the thickness by 5 mm,the surface temperature of the brake disk approximately increases by 8.24%and the thermal stress increases by 12.82%.The influence of friction ring thickness on thermal stress field is greater than on temperature field.There is linear relationshi Pbetween friction ring thickness and thermal stress and temperature.The results provide references for the subsequent service life prediction and maintenance of the brake disc.