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考虑到渡槽槽体内水体的晃动对结构模态正交性的影响,采用有限元以及有限体积方法分析了两种不同高宽比的渡槽结构在附加质量模型、Housner水体模型以及势流体这三种水体模型下的流固耦合动力特性,包括自振频率和主振型。在此基础上,探讨了三种不同水体模型下渡槽结构流固耦合模态的差异,得到渡槽结构在不同水体模型下的动力特性敏感性因素,为渡槽抗震抗风设计提供参考依据。
Taking into account the influence of the sloshing of the water body in the aqueduct on the mode orthogonality, finite element method and finite volume method are used to analyze the effect of the additional mass model, the Housner water model and the potential fluid on the aqueduct structure with two different aspect ratios Fluid-structure coupling dynamic characteristics under water body model, including natural frequency and main mode. On this basis, the differences of fluid-structure coupling modes of aqueduct structure under three different water body models are discussed. The dynamic characteristics of aqueduct structure under different water body models are obtained, which can provide references for seismic and wind-resistance design of aqueduct.