Experimental study on response characteristics of VIV of a flexible riser
Gao Yun1,2, Ren tie2, Fu Shi-xiao2,Xiong You-ming1,Zhao Yong3
1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Southwest Petroleum University, Chengdu, 610500;
2. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240;
3.Transportation Equipment and Ocean Engineering College,Dalian Maritime University,Dalian,116026
Laboratory tests had been conducted on the flexible riser, the aim of our present work is to further improve the understanding of the response performance of VIV for a long, flexible riser in water. The experiment was accomplished in the towing tank and the relative current was simulated by towing the flexible riser in one direction. The displacement can be obtained by the measured strain based on the modal analysis method. The flexible riser in flow with different velocity was analyzed here, and the response parameters such as strain, characteristic frequency, non-dimensional displacement, lock-in region and coefficient of the fluid force were studied. The analysis results show that the characteristics of the synchronization of VIV for a flexible riser is multi order, the vibration frequency jumps abruptly from one natural frequency to another during the high order synchronization region, and the VIV response decreases with the increased order of the synchronization.
高云1,2, 任铁2, 付世晓2,熊友明1,赵勇3. 柔性立管涡激振动响应特性试验研究[J]. 振动与冲击, 2015, 34(17): 6-11.
Gao Yun1,2, Ren tie2, Fu Shi-xiao2,Xiong You-ming1,Zhao Yong3. Experimental study on response characteristics of VIV of a flexible riser. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(17): 6-11.
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