Experimental investigation on the dynamic responses of a free-hanging water intake riser under vessel motion
| Autor: | Jianmin Yang, Shixiao Fu, Jingxi He, Jungao Wang, Peimin Cao, Sherry Xiang |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
business.industry Mechanical Engineering Work (physics) Motion (geometry) 020101 civil engineering Ocean Engineering 02 engineering and technology Mechanics Structural engineering 01 natural sciences 010305 fluids & plasmas 0201 civil engineering Vibration Cross section (physics) Mechanics of Materials Drag Vortex-induced vibration 0103 physical sciences Model test General Materials Science Water intake business |
| Zdroj: | Marine Structures. 50:1-19 |
| ISSN: | 0951-8339 |
| Popis: | A large-scale model test of a free-hanging water intake riser (WIR) is performed in an ocean basin to investigate the riser responses under vessel motion. Top end of the WIR is forced to oscillate at given vessel motion trajectories. Fiber Brag Grating (FBG) strain sensors are used to measure the WIR dynamic responses. Experimental results firstly confirms that the free-hanging WIR would experience out-of-plane vortex-induced vibrations (VIVs) under pure vessel motion even for the case with a KC number as low as 5. Meanwhile, comparison between numerical results and experimental measurements suggests a significant drag amplification by out-of-plane vessel motion-induced VIV. What’s more, further study on WIR response frequencies and cross section trajectories reveals a strong correlation between vessel motion-induced VIV and local KC number distribution, owing to the small KC number effect. The presented work provides useful references for gaining a better understanding on VIV induced by vessel motion, and for the development of future prediction models. |
| Databáze: | OpenAIRE |
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