考虑桥面风场等效气动效应的行车安全性分析

发布时间：2018-04-28 22:08

本文选题：风-车-桥 + 行车安全性　；参考：《工程力学》2017年07期

【摘要】：侧风作用下桥上通行车辆容易遭受行车安全问题。通过节段模型风洞试验,测试了主梁行车道位置上方一定高度范围内风场分布特性。基于车辆气动力和力矩等效的方法,采用等效风速和比例系数来考虑桥面气动绕流对车辆气动力特性的影响。在风-汽车-桥耦合振动研究的基础上,采用无量纲的侧倾和侧滑安全因子评价车辆的行车安全性,分析了风速和车速对不同类型车辆行车安全性的影响。结果表明:车辆的行车安全性随着风速和车速的增大而逐渐降低;桥面风场等效气动效应会降低集装箱车和旅行巴士的行车安全性,集装箱车RSF和SSF最大相对误差分别高达28.0%和184.3%。
[Abstract]:Under the action of crosswind, traffic on the bridge is vulnerable to traffic safety problems. The wind field distribution characteristics in a certain height range above the main girder driveway position are tested by the segmental model wind tunnel test. Based on the method of equivalent aerodynamic force and torque of vehicle, the effect of aerodynamic flow around bridge deck on the aerodynamic characteristics of vehicle is considered by using equivalent wind speed and proportional coefficient. Based on the study of wind-vehicle-bridge coupling vibration, the vehicle safety was evaluated by dimensionless rollover and sideslip safety factors, and the effects of wind speed and speed on the driving safety of different types of vehicles were analyzed. The results show that the driving safety of vehicle decreases with the increase of wind speed and speed, and the equivalent aerodynamic effect of bridge deck wind field will reduce the driving safety of container vehicle and travel bus. The maximum relative errors of RSF and SSF of container trucks are as high as 28.0% and 184.3% respectively.
【作者单位】：湖南科技大学土木工程学院;西南交通大学桥梁工程系;
【基金】：交通运输部应用基础研究计划项目(2014319J13100);交通运输部建设科技计划项目(2014318800240) 国家重点基础研究发展计划(973计划)项目(2015CB057702) 国家自然科学基金项目(51608193)
【分类号】：U441.3;U492.84

【相似文献】