Huang, Shan and Khorasanchi, Mahdi and Herfjord, Kjell (2011) Drag amplification of long flexible riser models undergoing multi-mode VIV in uniform currents. Journal of Fluids and Structures, 27 (3). pp. 342-353. ISSN 0889-9746Full text not available in this repository. (Request a copy from the Strathclyde author)
Measurement data of longf lexibleriser models are used to study the drag amplification due tomulti-mode vortex induced vibration (VIV). The riser model was towed in a towing tank, and vibration along its length was measured indirectly at a set of discrete points using accelerometers, along with the total drag and lift forces on the model. These data were used to fit expressions for the drag amplification taking into account the spatial variation of the vibration amplitude along the riser length.The result swere compared with the existing empirical expression used in the VIV analysis tool SHEAR7 as wellas other test data. It was found that the expression in SHEAR7 agrees well with the test data. However, for larger vibration amplitudes, it appears to under-predict the drag amplification.
|Keywords:||vortex induced vibration, VIV , drag amplification, flexible cylinder, deepwater riser, Naval architecture. Shipbuilding. Marine engineering, Mechanical Engineering|
|Subjects:||Naval Science > Naval architecture. Shipbuilding. Marine engineering|
|Department:||Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering|
|Depositing user:||Pure Administrator|
|Date Deposited:||11 Nov 2011 16:29|
|Last modified:||25 Nov 2016 03:26|