Time domain Vortex-Induced Vibration responses of a riser in consideration of the variation effect of added mass coefficient

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (1) : 53-59.

YUAN Yu-chao1,2， XUE Hong-xiang1,2， TANG Wen-yong1,2

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Abstract

A new time domain Vortex-Induced Vibration (VIV) prediction method for a marine riser was proposed, and a special added mass element was introduced, which can take into consideration the variation effect of added mass coefficient on the modal analysis and VIV prediction. Based on a recommended prediction model, the VIV response of riser models under uniform flow and sheared flow were simulated and the predicted results were compared with the test results about the root mean square amplitude as well as the time histories and amplitude spectra of the curvature, stain and displacement responses. It is found that the new time domain model can predict VIV responses of marine risers effectively and the predicted results are much more consistent with the observed test data than that of traditional numerical models. The variation effect of added mass coefficient on VIV response can affect the predicted results evidently.

Key words

Vortex-Induced Vibration / added mass coefficient / time domain prediction / uniform flow / sheared flow

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YUAN Yu-chao1,2， XUE Hong-xiang1,2， TANG Wen-yong1,2. Time domain Vortex-Induced Vibration responses of a riser in consideration of the variation effect of added mass coefficient[J]. Journal of Vibration and Shock, 2018, 37(1): 53-59

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