强阵风环境下高速列车运行安全性研究  

Study on Running Safety of High-speed Train under Gust

作　　者：曹亚博[1] 凌亮[1] 邓永权[1] 周力[1] 肖新标[1] 金学松[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《机械工程学报》2013年第18期30-37,共8页Journal of Mechanical Engineering

基　　金：国家重点基础研究发展计划(973计划;2011CB711103);国家科技支撑计划(2009BAG12A01-B02-2);教育部创新团队(IRT1178);铁道部科技研究开发计划(2008J013);四川省科技计划(10JC0395)资助项目

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-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Kalker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。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 model. A bi-exponential gust model adopted by the TSI standard is used to simulate the dynamic wind field and the dynamic aerodynamic 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 dynamic responses and derailment mechanism of the high-speed vehicles in the gust environment are discussed in detail. The main factors that affect the safe operation of the vehicles are investigated. Finally, the derailment boundary and safety operational area of high-speed train considering several key factors and derailment criteria are calculated. The numerical results could provide theoretical guidance for the operational control of high-speed train under gust.

关 键 词：高速列车 阵风 运行安全 脱轨准则 脱轨边界 

分 类 号：U270[机械工程—车辆工程]