Flow-Induced Vibration of Cantilever Beam by One-Way Fluid Structure Interaction Approach

Abstract

Vibration problems occur in many structural buildings and piping systems as a result of high flow velocities and turbulence at discontinuities in piping such as bends, tees, small bore connections and partially closed valves. This is because fluid flow is a souce of energy capable of producing structural and mechanical oscillations. The most accurate description to describe the interaction between the fluid dynamic forces and structural elastic forces is flow-induced vibration. In this paper, the flow-induced vibration of simply supported cantilever beam was investigated based on one-way fluid-structure interaction (FSI). Ansys Workbench was used to simulate the dynamic behaviour of the beam when subjected to air flow. There were two beam angle positions analysed at 60° and 90° vertically, where each beam was exposed to two different fluid flow rates of 10 and 15 m/s. Fluid fluent, transient structural, modal analysis, and harmonic analysis were among the analyses used in the study. The simulation results show that the overall analysis value such as fluid pressure, velocity, total deformation, von Mises stress, and frequency response of the beam at the 90° angle are higher than the 60° beam orientation. Higher levels of vibration were also found to be affected by speed and type of fluid flow. As the beam surface area strucked by the fluid flow increases, the overall values of the beam also increase. As for the conclusion, a 90° beam orientation at 15 m/s fluid flow velocity has more surface area where the fluid flow strikes than a 60° beam orientation.