两用斜拉桥在车—桥—风耦合下安全性能评价

Safety Evaluation of Dual-purpose Cable-stayed Bridge in Vehicle-Bridge-Wind Coupling

基于轮轨滚动接触蠕滑理论和准定常抖振力,建立车-桥-风系统空间耦合振动分析模型。研究不同车速、不同风速下轻轨列车通过大跨度斜拉桥的安全走行性。结合列车走行特性,对列车各项安全性评定标准进行了具体分析。研究表明,不同的车速和不同的风速在不同的阶段对列车运行安全性的影响程度不同。

Based on the theory of wheel-rail rolling contact creep and quasi-steady buffering,a vehicle-bridge-wind system vibration analytical model is established to study the security of light-rail trains running at different speeds through the large-span cable-stayed bridge under different winds. With features of the train running, a specific analysis is made of the standards for safety appraisal of the train. It shows that the impact on safety of train running is different at different speeds of vehicles and winds and different stages.