论文部分内容阅读
以芜湖长江大桥为算例，考虑风荷载作用于列车和桥梁上，对ＩＣＥ高速列车以２００ ｋｍ／ｈ的速度通过桥梁时，计算了与列车运行安全性及旅客乘座舒适度相关的指标。风荷载考虑为脉动的，按Ｓｉｍｉｕ谱用 Ｍｏｎｔｅ Ｃａｒｌｏ法模拟脉动风速，结合由风洞试验测定的空气动力参数，计算了作用于列车和桥梁上的自然风荷载。根据结构动力学理论，建立了机车（车辆）的动力学方程；建立了桥梁的有限元振动方程；桥上轨道不平顺按６级线路（最好的线路）模拟。计算结果表明，对芜湖长江大桥，桥上允许行车的桥面处横桥向最大风速应小于３０ ｍ／ｓ。
Taking Wuhu Yangtze River Bridge as an example, wind load is considered on trains and bridges. When the ICE passes through the bridge at a speed of 200 km / h, the indexes related to the safety of train operation and passenger seating comfort are calculated. The wind load was considered as pulsating, and the Monte Carlo method was used to simulate the fluctuating wind speed according to Simiu spectrum. Combined with the aerodynamic parameters measured by the wind tunnel test, the natural wind loads acting on the train and bridge were calculated. According to the theory of structural dynamics, the dynamic equation of the locomotive (vehicle) is established. The finite element vibration equation of the bridge is established. The track on the bridge is not smooth according to the 6th-order line (the best route). The calculation results show that for the Wuhu Yangtze River Bridge, the maximum wind speed at bridge deck at which the bridge is allowed to travel should be less than 30 m / s.