高速车轮踏面凹磨评价指标研究

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中图分类号：U269 文献标志码：B doi：10.20213/j.cnki.tdcl.2024.10.23.01

Abstract：China’s high-speed rail passenger transport is facilitated by specialized trains operating on dedicated lines. Line laying and maintenance are highly accurate. To guarantee the smooth operation of vehicles，the whel-raillateral displacement is minimal，and the whel tread is susceptible to concentrated wear and conformal wear in local areas，commonly referred to as concave wear. The concave wear of wheel tread leads to the larger equivalent conicity of wheel-rail， which is easy to cause high-speed yaw instability of vehicles in sections with poor local line profile. Measuring the equivalent conicity of the wheelset，turning them regularly，and polishing the rails are some of the methods used to resolve this isueby the Chinese high-speed rail operation and maintenance department， but the associated operational and maintenance expenses are substantial.Due to the aforementioned actual situation，this paper measures the concave wear of wheel treads throughout the entire repair process and presents the concepts of overall slope ratio，wear degree，and commonality based on the measured profile. It proposes a tread concave index and algorithm combined with a rail wear profile through a multiple regresson algorithm in order to improve the wheel-rail economy during the operation and maintenance process，while meanwhile taking safety into account.

Key words： concave wear; tread concave wear evaluation; concavity; repair;equivalent conicity

车轮踏面凹磨会影响高速列车的平稳性、舒适性和安全性，我国高速铁路采用定期璇修和复核的方式进行车轮运维，运维压力大。（剩余4358字）