摘要
解析模型可以更好地理解蠕滑、自旋对黏滑区分布的影响,并快速确定接触斑黏滑分布.为此,推导了Kalk⁃er简化理论和Polach理论的黏滑边界线解析表达式,并将其应用于轮轨磨耗计算.计算结果表明:蠕滑率及接触斑长短轴比值较小时,两种理论得到的黏滑分区及应力分布一致性较好,随着蠕滑率和长短轴比值增加,结果逐渐出现差异.轨面湿滑状态下,滑动区比例会明显增加,但是磨耗速率降低了20%~30%;制动等级对磨耗速率有显著影响,与常用制动相比,紧急制动使得磨耗大幅增加;列车速度提高使得轮轨滑动速度增加,加剧了磨耗速率.
The analytical solution helps better understand the effects of creep and spin on the stick-slip zone distributions and quickly determine the stick-slip distributions of contact patches.Therefore,the analytical ex-pressions of stick-slip boundaries of the Kalker simplified theory and the Polach theory were derived and ap-plied to the wheel-rail wear calculation.The calculation results show that,with small creepages and major axis-to-minor axis ratios of the contact patches,the stick-slip divisions and stress distributions obtained by the 2 theories are consistent.With the increases of the creepage and the major axis-to-minor axis ratio,the results gradually differ.For the wet rail surface,the slip zone proportion will increase significantly,but the wear rate will decrease by 20%~30%.The braking level has a significant effect on the wear rate,and the emergency bra-king causes a significant increase in wear compared to the normal braking.The increase of the train speed raises the wheel-rail sliding speed and aggravates the wear rate.
作者
程畅
王垚韡
陆晨旭
陈迪来
CHENG Chang;WANG Yaowei;LU Chenxu;CHEN Dilai(Changzhou Vocational Institute of Industry Technology,Changzhou,Jiangsu 213164,P.R.China;Shanghai Institute of Technology,Shanghai 201418,P.R.China)
出处
《应用数学和力学》
北大核心
2025年第8期1050-1063,共14页
Applied Mathematics and Mechanics
基金
上海科技创新行动计划(21210750300)
上海启明星计划(22YF1447600)。
作者简介
程畅(1970-),男,教授(E-mail:chengnahc@163.com);通讯作者:陆晨旭(1994-),男,讲师,博士(E-mail:18810327668@163.com).
