Abstract
Aiming at the modal problem of fluid-filled pipeline under fluid-structure interaction. At first, from the view of simulation, the modal characteristics of the simplified U-shaped pipeline structure under fluid-structure interaction were analyzed by ANSYS Workbench software. Then, from the view of experimental, the experimental modal analysis of the liquid-filled pipeline was carried out by means of frequency sweeping and hammering. Finally, the simulation model was modified based on the results of the experiment. The experimental results verified that the modified simulation model and the boundary conditions were correct. It provides a basis for the dynamic simulation and experimental analysis of the liquid-filled pipeline under fluid-structure interaction.
Highlights
Liquid-filled pipes have a wide range of applications in various industrial installations such as energy, power, petroleum, and chemical industries as well as ships and aircrafts
On the one hand, when the liquid-filled pipeline is subjected to an external load, if the frequency of the external load excitation is consistent with the natural frequency of the liquid-filled pipeline, a strong resonance will occur
The concept of fluid-structure interaction was first proposed by Asheley [2], that is, the motion of the flow field deforms the solid domain, while the deformation of the solid domain in turn affects the motion of the flow field
Summary
Liquid-filled pipes have a wide range of applications in various industrial installations such as energy, power, petroleum, and chemical industries as well as ships and aircrafts. The pulsating pressure of the fluid in the pipe causes the pipe to vibrate violently. The fluid-structure interaction effect has a great influence on the dynamic characteristics of the liquid-filled pipeline. In order to accurately analyze the modal characteristics of the liquid-filled pipe, the fluid-structure interaction effect between the pipe structure and the fluid must be considered. Li [5] et al studied the fluid-structure interaction vibration characteristics of a variable cross-section pipeline; Yu [6] studied the fluid-structure interaction modal analysis of liquid-filled pipelines under different constraints. MODAL ANALYSIS OF LIQUID-FILLED PIPELINE UNDER FLUID-STRUCTURE INTERACTION BY SIMULATION AND EXPERIMENT METHODS. 2. Fluid-structure interaction modal analysis of liquid-filled pipeline based on finite element simulation
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