Natural frequency analysis of fluid-conveying pipes in the ADINA system

4th Symposium on the Mechanics of Slender Structures

物理学;力学

Wang, L.^1 ; Gan, J.^1 ; Ni, Q.^1

Department of Mechanics, Hubei Key Laboratory for Engineering Structural Analysis and Safety Assessment, Huazhong University of Science and Technology, Wuhan 430074, China^1

关键词: Dynamic stiffness method;    Evolution trend;    Fluid-conveying pipe;    Frequency Analysis;    High flow velocity;    Pipes conveying fluid;    Structural models;    Threedimensional (3-d);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/448/1/012014/pdf
DOI  :  10.1088/1742-6596/448/1/012014

学科分类：力学，机械学

来源: IOP

【 摘 要 】

In this paper we present analysis and numerical simulations for the natural frequency of pipes conveying fluid in the ADINA system. The slender pipe structures are modelled as shells and the fluid flows are supposed to be three-dimensional (3D) and incompressible. The fluid and structural models are mechanically coupled on their interface through slip and displacement conditions. Several numerical examples for pipes shaped as different configurations show that the natural frequencies obtained based on ADINA codes are generally lower than those predicted by analytical or dynamic stiffness methods. In particular, for curved pipes conveying fluid with relatively high flow velocity, it is found that the evolution trend of natural frequencies with increasing flow velocity is similar as that predicted by the inextensible theory for curved pipes conveying fluid.