Features of Vortex Induced Vibration in Oscillatory FlowSource: Journal of Offshore Mechanics and Arctic Engineering:;2014:;volume( 136 ):;issue: 001::page 11801DOI: 10.1115/1.4025759Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Vortexinduced vibration (VIV) in oscillatory flow is experimentally investigated in the ocean basin. The test flexible cylinder was forced to harmonically oscillate in various combinations of amplitude and period with KeuleganCarpenter (KC) number between 26 and 178 in three different maximum reduced velocities, URmax=4, URmax=6.5, and URmax=7.9 separately. VIV responses at crossflow (CF) direction are investigated using modal decomposition and wavelet transformation. The results show that VIV in oscillatory flow is quite different from that in steady flow; features, such as intermittent VIV, hysteresis, amplitude modulation, and mode transition (time sharing) are observed. Moreover, a VIV developing process including “buildingup,†“lockin,†and “dyingout†in oscillatory flow, is further proposed and analyzed.
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| contributor author | Fu, Shixiao | |
| contributor author | Wang, Jungao | |
| contributor author | Baarholm, Rolf | |
| contributor author | Wu, Jie | |
| contributor author | Larsen, C. M. | |
| date accessioned | 2017-05-09T01:11:36Z | |
| date available | 2017-05-09T01:11:36Z | |
| date issued | 2014 | |
| identifier issn | 0892-7219 | |
| identifier other | omae_136_01_011801.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/156030 | |
| description abstract | Vortexinduced vibration (VIV) in oscillatory flow is experimentally investigated in the ocean basin. The test flexible cylinder was forced to harmonically oscillate in various combinations of amplitude and period with KeuleganCarpenter (KC) number between 26 and 178 in three different maximum reduced velocities, URmax=4, URmax=6.5, and URmax=7.9 separately. VIV responses at crossflow (CF) direction are investigated using modal decomposition and wavelet transformation. The results show that VIV in oscillatory flow is quite different from that in steady flow; features, such as intermittent VIV, hysteresis, amplitude modulation, and mode transition (time sharing) are observed. Moreover, a VIV developing process including “buildingup,†“lockin,†and “dyingout†in oscillatory flow, is further proposed and analyzed. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Features of Vortex Induced Vibration in Oscillatory Flow | |
| type | Journal Paper | |
| journal volume | 136 | |
| journal issue | 1 | |
| journal title | Journal of Offshore Mechanics and Arctic Engineering | |
| identifier doi | 10.1115/1.4025759 | |
| journal fristpage | 11801 | |
| journal lastpage | 11801 | |
| identifier eissn | 1528-896X | |
| tree | Journal of Offshore Mechanics and Arctic Engineering:;2014:;volume( 136 ):;issue: 001 | |
| contenttype | Fulltext |