• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (4): 245-254.doi: 10.3901/JME.2018.04.245

• 振动与噪声 • 上一篇    下一篇

随机风环境下高速列车运行安全评估研究

于梦阁1, 张骞1, 刘加利2, 张继业3   

  1. 1. 青岛大学机电工程学院 青岛 266071;
    2. 中车青岛四方机车车辆股份有限公司 青岛 266111;
    3. 西南交通大学牵引动力国家重点实验室 成都 610031
  • 收稿日期:2017-04-10 修回日期:2017-12-26 发布日期:2018-02-20
  • 通讯作者: 于梦阁(通信作者),女,1985年出生,博士,副教授。主要研究方向为列车空气动力学及外形优化,车辆系统动力学。E-mail:yumengge0627@163.com
  • 基金资助:
    国家自然科学基金(51705267,51605397)和山东省自然科学基金(ZR2014EEP002)资助项目

Study on the Operational Safety Evaluation of the High-speed Train Exposed to Stochastic Winds

YU Mengge1, ZHANG Qian1, LIU Jiali2, ZHANG Jiye3   

  1. 1. College of Mechanical and Electronic Engineering, Qingdao University, Qingdao 266071;
    2. CRRC Qingdao Sifang Co. Ltd., Qingdao 266111;
    3. State Key Laboratory of Traction Power, Southwest Jiao Tong University, Chengdu 610031
  • Received:2017-04-10 Revised:2017-12-26 Published:2018-02-20

摘要: 研究随机风环境下高速列车的气动特性及运行安全特性,提出一种随机风环境下高速列车运行安全的评估方法。基于Cooper理论和谐波叠加法建立任意风向角下随车移动点的脉动风速数值模拟方法,推导随机风作用下高速列车非定常气动载荷的计算公式;建立高速列车系统动力学模型,研究非定常气动载荷作用下高速列车的运行安全特性,获得随机风环境下高速列车安全运行的平均特征风速曲线及其置信区间。计算结果表明,在随机风环境下,高速列车的非定常气动载荷及轮重减载率具有随机特性,且近似服从正态分布;风向角越接近于90°,非定常气动载荷及轮重减载率的波动幅值越大;在相同的风向角下,MCWC随着列车速度的增加而减小;在相同的车速下,不同风向角下的MCWC由小到大的排序为90°、60°、120°、30°、150°。

关键词: 风向角, 高速列车, 气动载荷, 随机风, 运行安全

Abstract: The aerodynamic characteristics and operational safety are studied, and a methodology for evaluating the operational safety of the high-speed train exposed to stochastic winds is proposed. The numerical simulation method of the fluctuating winds at a moving point shifting with the train for any wind angle is established based on the Cooper theory and harmonic superposition method, the formula for computing the unsteady aerodynamic loads of the high-speed train exposed to stochastic winds is derived. The train system dynamic model is established to study the operational safety characteristics of the high-speed train exposed to unsteady aerodynamic loads. The mean characteristic wind curve (MCWC) and its spread range of the high-speed train exposed to stochastic winds are obtained. The results show that, in the stochastic winds environment, both the unsteady aerodynamic loads and the load reduction factor of the high-speed train have stochastic characteristics and approximately obey normal distribution. The nearer the wind angle approximates to 90°, the larger the fluctuation amplitude of the unsteady aerodynamic loads and load reduction factor are. For a constant wind angle, the MCWC decreases with the increasing of the train speed. For a constant train speed, the sorting of MCWC in ascending order for different wind angles is 90°, 60°, 120°, 30°, 150°.

Key words: aerodynamic loads, high-speed train, operational safety, stochastic winds, wind angle

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