Abstract
Numerical simulation method was adopted to analyze the influence of fluid-solid interaction (FSI) on the vibration characteristics of tubing. The natural frequencies and mode shapes of tubing were analyzed for the cases of no FSI, gas-solid interaction, and liquid-solid interaction in the modal module of ANSYS Workbench software. It shows that natural frequencies of tubing decreased when considering FSI. The decrease is greatest for the case of liquid-solid interaction, which is more than 13% compared with gas-solid interaction. The mode shapes are almost unchanged even considering FSI. The results show that the effect of FSI can not be ignored, especially when the internal fluid density is large.
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