Suspension parameter optimization for high-speed train with severe tread wear

ABSTRACT

The suspension parameters are optimized to improve the dynamic performance of high-speed train with severe tread wear and suppress the formation of severe tread wear. Except for the common indicator of high-conicity stability (A_high) for the vehicle dynamic performance with severe tread wear, a hollow wear index (HWI) is proposed to reduce the development rate of wheel hollow wear. Moreover, the low-conicity ride comfort (W_low) is considered for the dynamics performance with new tread. Yaw stiffness (YS) and the ratio of yaw damping to lateral damping (RYL) are proposed to characterize the suspension parameters matching. Results show that HWI is strongly positively correlated with W_low, and is negatively correlated with A_high. Increasing the RYL can enhance W_low, and the YS should be reduced to improve HWI under the condition of sufficient hunting stability margin. Hunting bifurcation analysis elucidates that the model with better HWI is easy to form supercritical bifurcation.

KEYWORDS:

• High-speed train
• tread wear
• suspension parameter optimization
• wheel hollow wear
• hunting bifurcation

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant numbers 52372403, U2268211], the Natural Science Foundation of Sichuan Province [grant numbers 2022NSFSC0034, 2022NSFSC1901], and the National Railway Group Science and Technology Program [grant number N2023J071].