跨海铁路列车气动性和波浪力研究

Research on Aerodynamics and Wave Forces of Crossing-sea Railway Train

摘要:

头门港支线二期铁路跨越台州湾，建设条件复杂，软土地层较厚，风大浪高。全年6级及以上大风天气多达246 d，为确保列车的运营结构安全，采用计算流体动力学的数值模拟方法对行驶状态列车的气动特性进行评价，以及以不同风速下列车的运营状态判断是否设置风屏障。海域东向面临外海，海域开阔，波浪多为风浪和涌浪组合的混合浪，在风暴潮、台风等极端恶劣海况下，桥墩可能遭受较严重的波浪灾害，影响大桥的整体稳定性，为此开展极端海况下的波浪力分析研究，对理论计算和数值模拟、模型试验数据进行对比，确定理论计算的基础整体波浪力的相位系数。

Abstract:

The Toumen Port Branch Line Phase II Railway crosses Taizhou Bay. The construction condition is complicated, the soft soil layer is thick, and the wind is strong and the wave is high. There are 246 d with strong winds of 6 or above in the whole year. In order to ensure the safety of train operation structure, the numerical simulation method of computational fluid dynamics (CFD) is used to evaluate the aerodynamic characteristics of trains under running conditions, and to determine whether to set wind barriers and train operation conditions under different wind speeds. The sea faces the open sea to the east, the sea is open, and the waves are mostly mixed waves combined with wind waves and swell waves. Under extreme sea conditions such as storm surge and typhoon, the pier may suffer serious wave disasters, which will affect the overall stability of the bridge. Therefore, the wave force under extreme sea conditions are analyzed and studied. The theoretical calculation, numerical simulation and model test data are compared to determine the phase coefficient of the whole wave force based on theoretical calculation.