A modified Kik-Piotrowski method which is able to consider the yaw angle of the wheelset and multi-point contact is established in order to study the dynamic behavior of the vehicle with tread worn-wheel. Combining the vehicle-track coupled dynamics, wheel-rail dynamic interaction is investigated for the CRH2 EMU with tread hollow-worn wheel running on the straight line. Results show that the modified Kik-Piotrowski method can be used to accurately simulate the multi-point and non-Hertzian contact between worn wheel and rail; both the predicted wheel-rail contact patch and the wheel-rail contact force have good agreements with CONTACT. The contact patch is distributed in two discontinuous areas at the boundary of the main wear region of the wheel tread, and instantaneous two-point wheel-rail contact occurs when the contact patch switches from one area to another area. The impact effect induced by the variation of wheel-rail contact point is not significant due to the transition of the two-point wheel-rail contact. Compared with the dynamic response of the vehicle without worn-wheel, the wheel-rail forces are slightly affected by the tread hollow-worn wheel, the effect on the wheel-rail lateral force is more significant than that on the wheel-rail vertical force. Both the wheel-rail vertical force and the wheel-rail lateral force are increased to a certain extent at the high frequencies.
SUN Yu
,
ZHU Shengyang
,
ZHAI Wanming
. Influence of Tread Hollow-worn Wheel on Wheel/rail Interaction[J]. Journal of Mechanical Engineering, 2018
, 54(4)
: 109
-116
.
DOI: 10.3901/JME.2018.04.109
[1] KALKER J.J. Three-dimensional elastic bodies in rolling contact[M]. Kluwer Academic Publishers,Dordrecht,Netherlands,1990.
[2] 金学松,刘启跃. 轮轨摩檫学[M]. 北京:中国铁道出版社,2004. JIN Xuesong,LIU Qiyue. Tribology of wheel and rail[M]. Beijing:China Railway Press,2004.
[3] LIU B, BRUNI S,VOLLEBREGT E. A non-Hertzian method for solving wheel-rail normal contact problem taking into account the effect of yaw[J]. Vehicle System Dynamics,2016,54(9):1226-1246.
[4] AYASSE J B,CHOLLET H. Determination of the wheel rail contact patch in semi-Hertzian conditions[J]. Vehicle System Dynamics,2005,43(3):161-172.
[5] PIOTROWSKI J,CHOLLET H. Wheel-rail contact models for vehicle system dynamics including multi-point contact[J]. Vehicle System Dynamics,2005,43(6-7):455-483.
[6] SH SICHANI M,ENBLOM R,BERG M. A novel method to model wheel-rail normal contact in vehicle dynamics simulation[J]. Vehicle System Dynamics,2014,52(12):1752-1764.
[7] PIOTROWSKI J,KIK W. A simplified model of wheel/rail contact mechanics for non-Hertzian problems and its application in rail vehicle dynamic simulations[J]. Vehicle System Dynamics,2008,46(1-2):27-48.
[8] JALILI M M,SALEHI S H. Phantom element method for calculation of normal wheel/rail contact forces based on semi-Hertzian method[J]. International Journal of Rail Transportation,2013,1(3):161-180.
[9] 翟婉明. 车辆-轨道耦合动力学(上册)[M]. 4版. 北京:科学出版社,2015. ZHAI Wanming.Vehicle-track coupled dynamics(Volume 1)[M]. 4th ed. Beijing:Science Press,2015.
[10] ZHAI Wanming,WANG Kaiyun,CAI Chenbiao. Fundamentals of vehicle-track coupled dynamics[J]. Vehicle System Dynamics,2009,47(11):1349-1376.
[11] KALKER J.J. A fast algorithm for the simplified theory of rolling contact[J]. Vehicle System Dynamics,1982,11(1):1-13.
[12] ZHAI Wanming. Two simple fast integration methods for large-scale dynamic problems in engineering[J]. International Journal for Numerical Methods in Engineering,1996,39(24):4199-4214.
[13] 康熊,刘秀波,李红艳,等. 高速铁路无砟轨道不平顺谱[J]. 中国科学:技术科学,2014,44(7):687-696. KANG Xiong,LIU Xiubo,LI Hongyan,et al. PSD of ballastless track irregularities of high-speed railway[J]. Scientia Sinica(Technologica),2014,44(7):687-696.
[14] ZHAI Wanming,LIU Pengfei,LIN Jianhui,et al. Experimental investigation on vibration behaviour of a CRH train at speed of 350 km/h[J]. International Journal of Rail Transportation,2015,3(1):1-16.
[15] 任尊松,金学松. 轮轨多点接触计算新方法曲线通过验证[J]. 机械工程学报,2010,46(16):1-7. REN Zunsong,JIN Xuesong. Verification for new wheel-rail muti-point contact method[J]. Journal of Mechanical Engineering,2010,46(16):1-7.
[16] 徐鹏. 列车-轨道-路基耦合振动及地震条件下行车安全性分析[D]. 成都:西南交通大学,2012. XU Peng. Study on vibration of train-track-subgrade coupled system and running safety of train in earthquake[D]. Chengdu:Southwest Jiaotong University,2012.
