Analysis of vortex-induced vibration (VIV) is an important component of the overall analysis of any tubular or bluff structure exposed to air or ocean currents. These days, it is common to see VIV analyses of various risers, tendons, pipelines, and structures in wind performed by novice analysts. This is concerning since the analyst may lack the ability to discern if the numbers output from a computational model are anywhere close to what would be expected in an experiment or in the field.
VIV Solutions staff has been performing VIV analyses of deepwater tubulars for a period of over 30 years. In addition, that same staff has been performing VIV suppression tests, examining field data, and studying VIV suppression devices for a period of over 30 years too. Not only does this allow us to give our results a “reality check” but it also allows us to avoid costly mistakes that can cause a dramatic difference in the amount of VIV suppression coverage required for a given project.
VIV Solutions utilizes SHEAR7 and some of its own internal models to perform VIV analyses of various tubulars. SHEAR7 evolved from a program that originated with Professor Kim Vandiver at MIT. In the early 1990s Don Allen, President of VIV Solutions, led a Joint Industry Program for Shell and MIT that culminated in the SHEAR7 model. Today, SHEAR7 is the model of choice for the vast majority of VIV analyses of deepwater tubulars. Recently, VIV Solutions has calibrated SHEAR7 for bare tubulars as well as both VIV Solutions’ helical strakes and VIV Solutions’ fairings.
We stand ready to assist you with your VIV analysis needs. Whether it is a complete analysis or just a peer review of an existing analysis we can provide strong technical support to your project.