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闸片材料参数与制动盘温度关系
引用本文:高飞,吴波文,杨俊英.闸片材料参数与制动盘温度关系[J].中国有色金属学报,2020(4):837-846.
作者姓名:高飞  吴波文  杨俊英
作者单位:大连交通大学连续挤压教育部工程研究中心
基金项目:国家重点研发计划重点专项(2016YFB0301403);辽宁省自然科学基金(20170520374);大连市青年科技之星项目(2017RQ135);辽宁省教育厅项目(JDL2016022)。
摘    要:闸片材料参数不仅关系到摩擦副的摩擦磨损性能,也是影响制动盘温度分布的一个重要因素。采用ADINA软件,建立列车制动盘和闸片的三维热机耦合有限元模型,在制动速度100 km/h、压力0.538 MPa和惯量23 kg·m2条件下,研究闸片材料热膨胀系数、弹性模量、热传导系数对制动盘温度和接触压力的影响。结果表明:当闸片热膨胀系数从0.5×10-5 K-1增大到2.5×10-5 K-1时,制动盘峰值温度升高8.4%,最大接触压力增大47%,闸片热膨胀系数的增大加剧接触压力分布不均匀程度而使制动盘温度变化明显;弹性模量增大9倍,接触压力的分布对弹性模量不敏感,弹性模量对盘面温度影响不明显。闸片热传导系数增大7倍,制动盘峰值温度下降4.3%,热传导系数增大,加快热量的扩散速度使制动盘峰值温度降低,该研究结论可为高速列车闸片材料的开发提供参考。

关 键 词:盘式制动  温度场  接触压力  热机耦合

Relationship of pad material parameters and brake disc temperature field
GAO Fei,WU Bo-wen,YANG Jun-ying.Relationship of pad material parameters and brake disc temperature field[J].The Chinese Journal of Nonferrous Metals,2020(4):837-846.
Authors:GAO Fei  WU Bo-wen  YANG Jun-ying
Affiliation:(Engineering Research Center of Continuous Extrusion(Ministry of Education),Dalian Jiaotong University,Dalian 116028,China)
Abstract:The material parameters of pad have important effects on the tribological properties of the friction pairs and the brake disc temperature distribution.Based on ADINA software,a 3D thermo-mechanical coupling model for brake disc and pad was established.The effect of thermal expansion coefficient,elastic modulus and thermal conductivity of pad material on brake disc temperature distribution and contact pressure at the interface was investigated under the brake conditions that the initial velocity was 100 km/h,brake pressure was 0.538 MPa and the inertia was 23 kg·m2.The results show that when the thermal expansion coefficient of the pad increases from 0.5×10-5 K-1 to 2.5×10-5 K-1,the disc peak temperature rises by 8.4%,the maximum contact pressure increases by 47%at the same time.With the increase of the thermal expansion coefficient,the contact pressure distribution becomes more uneven,which makes the disc temperature change significantly.The elastic modulus increases by 9 times,the distribution of contact pressure is not sensitive to the elastic modulus of pad material,and the elastic modulus has little influence on the temperature of brake disc.The thermal conductivity increases by 7 times,the peak temperature can be reduced by 4.3%,the increase of thermal conductivity promotes the heat diffusion rate,which can reduce the disc peak temperature.The research results can provide references for the development of high-speed train pad materials.
Keywords:disc brake  temperature field  contact pressure  thermo-mechanical coupling
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