论文部分内容阅读
针对公路汽车三维绕流特性显著的特点,按照准定常理论推导了适用于公路汽车的脉动风荷载表达式。将自然风、公路汽车、桥梁作为一个统一的相互作用系统,采用风-汽车-桥梁系统耦合振动分析模型,以某斜独塔混合梁斜拉桥为工程背景,研究侧风作用下汽车-桥梁耦合振动特性,并讨论了汽车-桥梁振动的影响因素。研究结果表明:由于桥梁和汽车的气动特性差异,桥梁的竖向抖振现象较横向抖振现象突出,而汽车的横向振动现象较竖向振动更明显。
Aiming at the remarkable characteristic of the three-dimensional flow around the road vehicle, the pulsating wind load expression applicable to the road vehicle is derived according to the quasi-stationary theory. The natural wind, road vehicle and bridge are taken as a unified interaction system. The wind-vehicle-bridge system coupled vibration analysis model is adopted. Taking a cable-stayed bridge with a single tower and a single tower as an example, Coupling vibration characteristics are discussed and the influencing factors of vehicle - bridge vibration are discussed. The results show that due to the difference of the aerodynamic characteristics between the bridge and the automobile, the vertical buffeting phenomenon of the bridge is more prominent than the lateral buffeting phenomenon, while the transverse vibration of the vehicle is more obvious than the vertical vibration.