Open AccessComparison of acoustic-structure based one-way FSI and two-way FSI
Author(s) -
Xinxin Xia,
Lingjiu Zhou,
W Wang,
H R Zhang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/627/1/012013
Subject(s) - vortex induced vibration , fluid–structure interaction , vortex shedding , cylinder , vibration , lock (firearm) , acoustics , mechanics , reynolds number , vortex , computer science , flow (mathematics) , physics , structural engineering , mechanical engineering , engineering , finite element method , turbulence
In the numerical simulation of flow-induced vibration using two-way fluid-structure interaction (TW-FSI) method, it is usually limited by mesh deformation, and consumes a lot of computing resources. These problems can be avoided by adopting acoustic-structure based one-way FSI (ASOW-FSI) approach. The purpose of this work is to explore the applicability of ASOW-FSI, and to analyze the similarities and differences between the two dynamic response analysis methods. A series of numerical calculations are carried out for the elastically mounted rigid cylinder at low Reynolds number. By systematically comparing the results calculated by these two methods, we found that ASOW-FSI can accurately predict the response in the range of partial reduced velocity, even closer to the experimental results than TW-FSI method. The main reason for the difference between the two methods in the whole reduced velocity range is that the ASOW-FSI method can not predict the “lock-in”. Finally, the mechanism of “lock-in” in vortex-induced vibration (VIV) is analyzed by forced oscillation. The results show that the structural vibration has the ability to dominate the vortex shedding under certain conditions. If the natural mode of the structure is excited at this time, “lock-in” will occur.