【摘要】 以排架渡槽为研究对象,建立3维渡槽-水流固耦合体计算模型,设置板式橡胶隔震支座,通过Mooney-Rivlin应变能密度函数模型模拟橡胶材料的本构,采用任意拉格朗日-欧拉(ALE)方法求解渡槽和水体间的耦合动力作用问题,针对不同水深工况,计算分析渡槽-水流固耦合体自振频率以及在地震作用下的位移、应力和水体晃动波高。研究结果表明:渡槽横槽方向为结构刚度最小方向,隔震支座的设置降低了渡槽结构的刚度,延长结构的自振周期;在地震作用下,槽体与水体间的流固耦合作用使得槽身内壁两侧的应力较大;隔震支座的设置增大渡槽结构的位移响应以及槽内水体晃动的幅度,但有效降低渡槽各部位的应力响应,提高渡槽结构的抗震性能。更多还原

【Abstract】 Based on bent-type aqueduct structures,dynamic characteristics and isolation of aqueduct-water coupling systems were studied by using the Arbitrary Lagrangian-Eulerian(ALE) method.Three-dimensional model with fluid-structure interaction was established,and the plate rubber support was installed.Mooney-Rivlin strain energy density model simulated mechanical constitutive relations of rubber material.The natural vibration frequency,displacement,stress of aqueduct structure,and the water sloshing height were calculated in different water depth conditions under earthquake wave action.The results show that the transverse stiffness is less.The application of isolation technology can reduce stiffness of aqueduct structure and extend natural vibration period of aqueduct structure.The fluid-structure interaction increases stress of the internal wall under earthquake wave action.The seismic displacement response of aqueduct structure and the water sloshing height increase by applying the isolation technology,but the application of isolation technology remarkably reduces the seismic stress response and elevates earthquake resistance performance.更多还原