【摘要】 以排架U形渡槽为研究对象,建立三维流固耦合模型,通过自回归滑动平均(ARMA)模型模拟的脉动风,采用任意拉格朗日-欧拉(ALE)方法分析了U形渡槽风振动力响应.结果表明:在风荷载作用下,水体与槽壁的动力相互作用是一种复杂的非线性过程;槽内水体晃动产生的动水压力很小,但水体的存在增大了槽体的横向位移;由于水体和槽壁间的耦合动力作用,槽身内壁两侧的主应力较大;随着水深的增大,处于不同高度位置的槽壁,其主应力的增减趋势不同.更多还原

【Abstract】 The fluctuating wind speed of a U-shaped aqueduct was simulated using the auto-regressive moving average(ARMA) model.A three-dimensional fluid-structure interaction model was established.The arbitrary Lagrangian-Eulerian(ALE) method was used to study wind-induced dynamic response of U-shaped aqueduct-water coupling systems.The results show that the interaction between the water and the aqueduct wall is remarkably nonlinear.The hydrodynamic pressure on the aqueduct wall induced by the surging wave of water in the aqueduct is very small.Under wind loading,water in the aqueduct increases the transversal displacement of aqueduct.As the dynamic coupling between the aqueduct wall and the water,the principal stresses of the left and right sides of the inner wall of aqueduct are large.The increasing or decreasing trend of the principal stress of the inner wall at different heights is different with the increase of water depth.更多还原