Vortex Induced Vibration of a Steel Catenary Riser Under Out-of-Plane Current: An Experimental Study

To investigate the VIV characteristics and to further develop the corresponding numerical predictions of a steel catenary riser under out-of-plane current, a large-scale model of a steel catenary riser was towing in an ocean basin at various speeds and directions. Fiber Bragg grating strain sensors are instrumented on the riser model to measure both in-plane and out-of-plane responses. The vortex-induced vibration responses of the steel catenary riser under out-of-plane current, i.e., the oscillating amplitude, the response frequency, and the traveling wave phenomenon, are compared with those under the in-plane current.