席志德, 陈炳德, 李朋洲, 蒋自龙. 输送流体的同心圆筒结构动力学特性研究[J]. 工程力学, 2008, 25(11): 218-222.
引用本文: 席志德, 陈炳德, 李朋洲, 蒋自龙. 输送流体的同心圆筒结构动力学特性研究[J]. 工程力学, 2008, 25(11): 218-222.
XI Zhi-de, CHEN Bing-de, LI Peng-zhou, JIANG Zi-long. THE DYNAMIC CHARACTERISTICS OF COAXIAL CYLINDRIAL SHELL CONVEYING FLUID[J]. Engineering Mechanics, 2008, 25(11): 218-222.
Citation: XI Zhi-de, CHEN Bing-de, LI Peng-zhou, JIANG Zi-long. THE DYNAMIC CHARACTERISTICS OF COAXIAL CYLINDRIAL SHELL CONVEYING FLUID[J]. Engineering Mechanics, 2008, 25(11): 218-222.

输送流体的同心圆筒结构动力学特性研究

THE DYNAMIC CHARACTERISTICS OF COAXIAL CYLINDRIAL SHELL CONVEYING FLUID

  • 摘要: 该文研究了以反应堆吊篮为工程背景的两同心圆筒结构在内外流的共同作用下的动态特性,用Flugge壳式理论和流体势流理论推导出了描述此类系统的频率方程,用秦山核电站II期1∶5模型实验的模型作为该文的算例,求解频率方程获得了结构的固有振动频率,并讨论了影响结构振动频率的因素,如流体速度、密度和结构的厚径比,在这些因素中,流速对结构的固有频率的影响较小。因此,可以用结构在静水中的固有频率近似结构在动水中的固有频率。

     

    Abstract: With Nuclear Power Plant (NPP) reactor core barrel as engineering background, this paper studies the dynamic characteristics of coaxial cylindrical shell conveying fluid. Based on Flugge shell theory and the potential theory in fluid mechanics, this paper obtains the equation which describes the dynamic characteristics of coaxial cylindrical shell system. The model of the Qinshan NPP phase II 1:5 model test is used as an illustration to verify the developed equation. The natural frequencies of the structure are obtained by solving the frequency equation. This paper discusses the factors influencing this system’s dynamic characteristics, such as the fluid velocity fluid density and the ratio of thickness versus diameter of structure. Among all these factors the influence of fluid velocity is less than others. So the natural frequency in still water can be used in the case of moving water.

     

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