【摘要】 基于弹性波传播理论,构造液体晃动的等效弹性体模型,将液体晃动问题归结为弹性体动力问题,建立位移-压力格式的流固耦合方程,采用静态缩聚技术求解流固耦合特征值问题。在此基础上,推导地震条件下的流固耦合系统有限元模型。对储液容器的特征值问题和动态响应问题进行了实例分析和计算,算例结果验证了方法的正确性与有效性。更多还原

【Abstract】 Based on elastic wave propagation theory,the equivalent elastic body for liquid sloshing was obtained and the liquid sloshing can be formulated as a dynamic question for elastic body.The 3-D liquid-filled tank was considered as a fluid-structures interaction system that consists of the ideal fluid with free surface and the linear,elastic solid with thin thickness,and the coupling equation based on displacement(structure)-pressure(fluid with free surface) format was established.The static condensation method was used for eigenvalue problems of liquid sloshing.Taking into account earthquake effect leads to additional load to the coupling equations,a finite element model of liquid-filled tank was set up.The eigenvalue problem and dynamic response of a liquid-filled tank were studied using the model.A numerical simulation of a liquid-filled tank was carried out to confirm the validity and effectiveness of the method.更多还原