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针对某实际工程,研究了塔体结构与水体的流固耦合力学模型。建立了考虑流固耦合作用的水塔结构力学分析有限元模型,采用ANSYS软件对水塔自振频率特性和地震时程反应下的位移响应进行了计算分析。计算结果表明:水体的晃动会影响结构的自振频率;水塔自身刚度愈大,动水压力对频率影响愈小;水塔储水深度增大,自振频率下降较快。水体的晃动可以减小地震影响下的塔体的位移反应。
For a practical project, the fluid-structure interaction mechanics model of tower structure and water body is studied. The finite element model of the structure of a water tower considering fluid-structure interaction was established. The ANSYS software was used to calculate the frequency response of the tower and the displacement response under the earthquake time-history reaction. The calculation results show that: the sloshing of the water body will affect the natural frequency of the structure; the greater the rigidity of the water tower itself, the smaller the influence of hydrodynamic pressure on the frequency; the increase of the water storage depth and the decrease of the natural frequency. The sloshing of the water body can reduce the displacement reaction of the tower under the earthquake.