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The starting point here is a fairly complete description of the cochlea as a hydroelastic system.


Furthermore, the determination of the hydroelastic spinslosh problem is presented, since the elasticity of the spinning container wall may considerably influence the magnitude of the coupled frequencies of the liquidstructure system.


Hydroelastic vibrations of a uniformly rotating infinitely long circular cylindrical container


The experimental model complies with the theoretical conditions of hydroelastic structural similitude and the fluid in which it is immersed is plain water.


Hydroelastic reduced scale model for waveloaded compliant tower

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 In this paper, the finite element technique is used to construct the mass and stiffness matrices of the revolutionary shell,and the finite elem ent procedure is used in conjunction with a simple source distribution on all surfaces of a liquid, which is contained in the rovolutionary shell, to drive the expressions for the mass and stiffness(because of the gravity) matrices of the liquid. Once they are obtained, they can be combined with those of that shell in order to analysis the earthquake hydroelastic... In this paper, the finite element technique is used to construct the mass and stiffness matrices of the revolutionary shell,and the finite elem ent procedure is used in conjunction with a simple source distribution on all surfaces of a liquid, which is contained in the rovolutionary shell, to drive the expressions for the mass and stiffness(because of the gravity) matrices of the liquid. Once they are obtained, they can be combined with those of that shell in order to analysis the earthquake hydroelastic respo nse of the liquid storage tanks. Two examples of the revolutionary liquid storage tanks supported by columms was discussed. Due to the circum ferential. deformation of the tank, caused by horizontal earthquake, is of the cosine type, we may use the concept of "substructure" to deal with the couple problem of the Fourian coefficient when the axissymmetry of the revolutionary shell was destroyed. At last, in order to simplify the earthquake response analysis of the tank, based on the calculation above, the antiearthquake evaluation on three examples are illustrated with the beam deformation theory, and then the approximate method to dea1 with the more complex problem for the structure in water is presented. Along with it the actual measured results of that three calculated examples are descriped.  本文按有限元法导出了回转壳的刚度阵和质量阵，并用有限元法与源汇法 相结合的方法导出了该容器中液体的刚度阵（重力引起的）与质量阵，把它们 相应地加在一起就可用于对贮液罐作水弹性抗震分析。同时，对文中两个具有 柱支承的贮液罐，因其在水平地震时其周向主要呈ｃｏｓθ变形，于是，可利用 “子结构”的概念来处理当回转壳轴对称性被破坏时所出现的富氏系数耦联问 题。最后，为了使贮液罐抗震分析得到简化，本文又在上面计算分析的基础 上，按梁变形理论对文中列举的三个具体算例进行了抗震分析。从而为一些较 复杂的水中工程结构的抗震分析提供了近似计算方法。 文后列举了三个算例的频率实测结果。  A Galerkin finite elementunrestrained modal synthesis method is proposed for predictingthe fluidstructure coupling natural vibration modes and responses of hydrodynamic pressures free liquid surface displacements and container deformations to excitations such as earthquakes in a liquid filled elastic container. It has been applied in particular to treatmentof the hydroelastic problems of liquid containers of revolution. Improvement has been madein axisymmetric finite element modelling to overcome the... A Galerkin finite elementunrestrained modal synthesis method is proposed for predictingthe fluidstructure coupling natural vibration modes and responses of hydrodynamic pressures free liquid surface displacements and container deformations to excitations such as earthquakes in a liquid filled elastic container. It has been applied in particular to treatmentof the hydroelastic problems of liquid containers of revolution. Improvement has been madein axisymmetric finite element modelling to overcome the drawbacks of existing semianalytical finite element models for analyzing axisymmetric potential problems. All dynamicfluidstructure coupling effects have been taken into account. Numerical results show goodagreement with experimental ones and considerable reduction in computational workload.The present method is especially efficient in the hydroelastic analysis of a container filledwith different liquids or the same liquid to different depths.  本文提出一种计算弹性容器——有自由面贮液流固耦合系统的固有振动模态和液体动压力、自由液面位移及容器弹性变形对地震等激励的响应的伽辽金有限元——自由界面模态综合方法,着重处理旋成贮液容器的水动弹性问题。该方法计及全部流固动力耦合效应,但显著压缩了计算规模,计算结果与试验符合得很好。当需要在多种贮液深度进行贮液容器的水动弹性分析时,本方法尤其经济有效。  According to the elastic theory of shells and plates and the hydroelastic theory, the shellliquidplate coupling vibration is analyzed by means of the finite element method and source distribution technique in this paper. The natural frequency and mode of the oil storage tank with an infloating roof supported on the ground are calculated, and its dynamic response to the horizontal earthquake motion is analyzed. At last, the synthetic effect of some faotors, such as liquid sloshing, floating roof, dome... According to the elastic theory of shells and plates and the hydroelastic theory, the shellliquidplate coupling vibration is analyzed by means of the finite element method and source distribution technique in this paper. The natural frequency and mode of the oil storage tank with an infloating roof supported on the ground are calculated, and its dynamic response to the horizontal earthquake motion is analyzed. At last, the synthetic effect of some faotors, such as liquid sloshing, floating roof, dome etc., is discussed.  本文根据壳、板的变形理论,水弹性理论,应用有限元法和源汇法,分析计算了内浮顶油罐—壳液板耦联振动体系。本文着重计算和分析了刚性基础上的内浮顶油罐的固有频率、振型和水平地面加速度作用下的动力响应。分析和讨论了各种因素(液面幌动、浮板、顶盖)的综合效应。   << 更多相关文摘 
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