强阵风环境下高速列车运行安全性研究.pdfVIP

学兔兔 第49卷第18期 机 械 工 程 学 报 V01．49 NO．1 8 20 l 3年 9月 JOURNAL 0F MECHANICAL ENGINEERING Sep． 2 0 1 3 DoI：10．3901／JME．2013．18．030 强阵风环境下高速列车运行安全性研究木 曹亚博 凌 亮 邓永权 周 力 肖新标 金学松 (西南交通大学牵引动力国家重点实验室 成都 610031) 摘要：为研究强阵风环境下高速列车的运行安全与脱轨边界，建立考虑阵风作用下的高速车辆．轨道耦合动态脱轨模型。计 算模型中，将高速车辆简化为具有 35自由度的多刚体系统，有砟轨道视为三层质量-弹簧一阻尼系统，动态风场考虑TSI标 准提出的双指数动态阵风模型，并将车辆周围气动载荷简化为作用在车体质心处的集中力系。采用Hertz非线性弹性接触理 论和 Ka~er线性蠕滑理论分别计算轮轨间法向力和蠕滑力，再用沈氏理论对蠕滑力进行非线性修正。基于数值仿真计算， 对强阵风作用下高速车辆的动力学响应、脱轨机理及关键影响因素进行深入的研究，并给出考虑多种关键影响因素及脱轨评 价准则的高速车辆脱轨／安全域，可以为阵风环境下高速列车的安全控制提供理论指导。 关键词：高速列车 阵风 运行安全 脱轨准则 脱轨边界 中图分类号：U270 Study on Running Safety of High—speed Train under Gust CAO Yabo LING Liang DENG Yongquan ZHOU Li XIAO Xinbiao JIN Xuesong (Traction Power State Key Laboratory,Southwest Jiaotong University,Chengdu 6 1 003 1) Abstract：In order to investigate the running safety and derailment boundary of high—speed train subjected to strong gusts，a coupled vehicle／track dynamic model considering the gust environment is developed．In the model，the vehicle is modeled as a multi-body system with 35 degrees of freedom，the ballast track is assumed as a three layers discrete elastic support mode1．A bi·exponential gust model adopted by the TSI standard is used to simulate the dynam ic wind field and the dynam ic aerodyrnamic forces caused by gusts are modeled as the external forces exerted on the mass center of vehicle body．The wheel／rail normal forces and creep forces are calculated by using Hertz nonlinear contact theory and SHEN’S nonlinear creep theory respectively．Based on the numerical calculation，the dyn am ic responses and derailment mechanism of the high—speed vehicles in the gust environment are discussed in detail．The main fac