The following paper presents the results of preliminary data analysis performed on a densely instrumented bare riser undergoing Vortex-Induced Vibration (VIV) response at high mode number. The data analysis steps are presented and show a method whereby it is possible to resolve uncertainty in the orientation of strain gauges on a riser responding to VIV. Two new phenomena are then revealed from the data analysis. The first is the occurrence of higher harmonic VIV response in directions which are not orthogonal to the cross-flow and inline directions. Secondly, evidence of riser structural response in the form of wave propagation is observed.
Volume Subject Area:
CFD and VIV
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