LYU Xiaoyong,WANG Yong,ZHANG Xiaoping,et al.Research on railway vehicle performance of passing through turnouts forward at 160 km/h[J].Electric drive for locomotives,2023(4):42-49.
LYU Xiaoyong,WANG Yong,ZHANG Xiaoping,et al.Research on railway vehicle performance of passing through turnouts forward at 160 km/h[J].Electric drive for locomotives,2023(4):42-49. DOI: 10.13890/j.issn.1000-128X.2023.02.101.
Research on railway vehicle performance of passing through turnouts forward at 160 km/h
This paper first introduced the principle and process of modeling turnouts by the multi-body dynamics software Simpack
and then expounded the process to solve the wheel-rail contact geometric relationship in the turnout area using the trajectory method programmed by MATLAB and based on the measured data of No. 12 speeding-up turnout profile and JM3 tread
and accordingly revealed the distribution of wheel-rail contact points in different turnout areas as the study results. A vehicle-turnout dynamic interaction model was first established by Simpack in the current study according to the characteristics of 160 km/h railway vehicles
to simulate the dynamic response of the vehicle passing through turnouts at 160 km/h directly and inversely before and after the tread wear
and to discuss the impact of the stiffness and damping of the vehicle's lateral damper and anti-hunting damper on the hunting motion in the turnout area. The results show that the continuous changes of wheel-rail contact geometry in the turnout area is an important factor affecting the dynamic performance of the turnout area. To be specific
when the vehicle passes through turnouts with discontinuous wheel-rail contact points
the wheel-rail coupling is vulnerable to impact
which is mainly represented by the vertical impact and vibration at the frog
and any sudden change of the contact points also causes lateral vibration. The vehicle with over-worn treads suffers from the hunting motion when passing through turnouts at a high speed
which can be suppressed by adjusting the parameters of the anti-hunting damper and lateral damper
as a move to improve the dynamic performance of the vehicle passing through turnouts.
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