摘要
以成都地铁车辆为研究对象,利用有限元软件ANSYS建立车轮踏面紧急制动时的真实尺寸模型,热分析车轮在连续2次紧急制动时的踏面温度,再将踏面温度作为热载荷,计算分析车轮踏面的结构热应力。重点分析在不同闸瓦宽度条件下,车轮踏面的温度以及对应结构热应力的变化情况;分析不同硬度的闸瓦在连续2次紧急制动时踏面温度与热应力的变化情况。
Taking Chengdu metro vehicle as a case study,the full-scale model of wheel tread emergency braking is established by using finite element software ANSYS. The tread temperature of the wheel during two consecutive emergency braking is analyzed by thermal analysis, and then the tread temperature is taken as thermal load to calculate and analyze the structural thermal stress of the wheel tread. The change of wheel tread temperature and corresponding thermal stress under different brake shoe widths is analyzed, and the change of tread temperature and thermal stress under different brake shoe hardness during two consecutive emergency brakes is analyzed.
引文
[1]H Blok.Theoretical study of temperature rise at surfaces of actual contact under oilinesss conditions[C]//Proceeding of the Institute of mechanical engineers general discussion of lubrication.London:Institute of Mechanical Engineers,1937(2):222-235.
[2]J C Jaeger.Moving sources of heat and the temperature of sliding contacts[J].Proc.R.Soc.N.S.W.,1942(76):203-224.
[3]M A Tanvir.Temperature rise due to slip between wheel and rail-an analytical solution for Hertzian contact[J].Wear,1980(61):295-308.
[4]童乐,钟斌,陈刚,等.基于ANSYS的火车车轮热应力有限元分析[J].安徽冶金,2018(2):7-11.
[5]刘洋,蒋硕,吴亚平.剥离掉块对轮轨滑动接触热弹塑性的影响[J].交通运输工程学报,2016,16(2):46-55.
[6]杨新文,顾少杰,周顺华,等.30t轴重重载铁路轮轨滑动接触引起的钢轨热相变分析[J].铁道学报,2016,38(7):84-90.
[7]Lonsdale C.Wheel Thermal Loading Issues For Heavy Haul Freight Cars[J].Foreign Rolling Stock,2005,42(6):32-37.
[8]Y C Chen,J H Kuang,L W Chen.Wheel-rail thermal contact on rail corrugation during wheel braking[J].ASME International Mechanical Engineering Congress and Exposition,2005,5(11):417-424.
[9]马思群,李吉,王成强,等.城轨车车轮轮对热容量有限元分析[J].大连交通大学学报,2016,37(3):19-22.
[10]文永蓬,郑晓明,尚慧琳,等.考虑不同辐板的城市轨道车轮热力耦合特性研究[J].机械强度,2018,40(1):165-170.
[11]Shahab Teimourimanesh,Tore Vernersson,Roger Lundén.Thermal capacity of tread-braked railway wheels.Part 1:Modelling[J].Proceedings of the Institution of Mechanical Engineers,Part F:Journal of Rail and Rapid Transit,2016,230(3):784-797.
[12]贾世平.地铁车辆转向架制动动态温升特性研究[D].上海:同济大学,2007.
[13]Bao Y W,Wang W,Zhou Y C.Investigation of the relationship between elastic modulus and hardness based on depth-sensing indentation measurements[J].Acta Materialia,2004,52(18):5397-5404.
[14]徐志东,范子亮.金属材料的弹性模量随温度变化规律的唯象解释[J].西南交通大学学报,1993,28(2):87-92.
[15]文永蓬,郑晓明,尚慧琳,等.考虑不同辐板的城市轨道车轮热力耦合特性研究[J].机械强度,2018,40(1):165-170.
