Flow Induced Vibration Analysis in Pipeline by using One-Way and Two-Way Fluid Structure Interaction

Abstract

The fluid flow velocity is one of the most important parameters since it significantly influences the mutual interaction between the fluid domain and the structural domain. The structural deformation, structural velocity, and von Mises stress of the pipe structure and the pressure and velocity of the deformed fluid were analyzed under two different flows: laminar and turbulent flow, corresponding to the fluid velocities. This study showed that the total deformation, velocity distribution, and Von Mises stress distribution of the pipe structure increase when the inlet velocity of the fluid increases, as shown in the ANSYS Transient Structural System. Consequently, the pressure and velocity distribution in the fluid stream that absorbs the resultant or residual structural deformation also increases as the inlet velocities of the fluid increase. In both areas, the results showed that the laminar flow has much higher deformations, velocities, stresses, and pressures for the two-way FSI of the pipe structure compared to the turbulent flow. The pipe structure's natural frequencies and modes were determined using ANSYS Modal Analysis. For the harmonic response, the results show that the frequency response for the turbulent flow is slightly lower for the two-way FSI of the pipe structure compared to the laminar flow in the same natural frequency range. Based on the research, it is evident that one-way FSI and two-way FSI provide similar results in terms of the deformation of the structure and the resulting structural deformation.