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介绍了带盖、固定于地面的钢储液箱的动力参数、自振频率及振型的试验和数值研究结果。考虑了3个不同高宽比钢储液箱。3个储液箱高度均为12.190m,半径分别为6.095,8.000,9.144m。讨论了不同高宽比和不同液体高度所引起的动力参数对试验的影响。利用ANSYS软件建立了储液箱的有限元模型。尽管模型中限制了流体与结构的相互作用,但是在运用数值模型分析储液箱-液体体系之前,应利用试验明确这种作用。因此,做了一系列环境振动试验得到自振频率和振型。数值分析和试验结果吻合较好。还考虑了储液箱盖子对自振频率和振型的影响,结果显示:储液箱钢盖对自振频率的影响可以忽略不计,但对储液箱顶部的径向变形和振型有着显著影响。
The experimental and numerical results of dynamic parameters, natural frequency and vibration mode of steel tanks with covers and fixed to the ground are introduced. Three different aspect ratio steel tanks were considered. The three tank height are 12.190m, the radius of 6.095,8.000,9.144m. The influence of dynamic parameters caused by different aspect ratio and different liquid height on the test is discussed. The finite element model of liquid storage tank was established by ANSYS software. Although fluid-structure interactions are limited in the model, experiments should be used to clarify this effect before using a numerical model to analyze a liquid-liquid system. Therefore, a series of environmental vibration tests have been done to find the natural frequencies and mode shapes. The numerical analysis is in good agreement with the experimental results. The influence of tank cap on natural frequency and mode shape is also considered. The results show that the influence of tank cap on natural frequency is negligible, but the radial deformation and mode shape of tank top are significant influences.