摘要
风-汽车-桥梁系统空间耦合振动是风-桥、风-汽车及汽车-桥梁系统相互作用三方面协调工作的结果,其振动特性取决于自然风特性、车辆动力特性、桥梁振动特性、车辆和桥梁气动特性相互影响等多种因素,将风、汽车、桥梁三者作为一个相互作用的系统,提出一个较为完善的风-汽车-桥梁系统空间耦合振动分析模型,编制相应的分析模块WVB(Wind-Vehicle-Bridge system analysis),并嵌入到自行研发的桥梁结构动力分析软件BDANS(Bridge Dynamic ANalysis System)。建立车辆驾驶员位置处驾驶舒适性评价方法。研究侧风与桥梁振动对车辆驾驶舒适性的作用,并探讨路面粗糙度、平均风速和车速对风环境下行驶在大跨度斜拉桥上车辆驾驶舒适性的影响。研究结果表明:侧风对车辆的竖向驾驶舒适性影响不大而主要影响车辆的侧向驾驶舒适性;桥梁振动对车辆竖向驾驶舒适度影响显著并明显改变其频谱特性。
A wind-vehicle-bridge system can be regarded as the result of wind-bridge, wind-vehicle, and vehicle- bridge interactions, which is determined by wind feature, vehicle dynamic characteristics and bridge structure, interrelationship between bridge and vehicle dynamic properties and so on. State of the art three-dimensional dynamic model of the wind-vehicle-bridge coupling vibration is presented and used to develop a dynamic analysis module, WVB, and the code named as BDANS. An assessment method for ride of road vehicles at driver seat is established. Ride comfort of road vehicles under various conditions of road roughness, vehicle speed, and crosswind speed is investigated for vehicles running either on ground or on cable-stayed bridge with and without crosswind. The results show that crosswind influences the ride comfort of vehicles in the lateral direction while the bridge motion affects the ride comfort of vehicles in the vertical direction.
出处
《土木工程学报》
EI
CSCD
北大核心
2008年第4期55-60,共6页
China Civil Engineering Journal
基金
国家自然科学基金(50478109)
交通部交通科技计划(2003319H01010)
