Joint team probes steel riser vibration

To test the vibration behavior of deepwater risers, 2H Offshore Engineering towed 200-m, 10-in. pipes at speeds of up to 3 m/sec. The tests were carried out near Stavanger, with the lead boat pulling a tow wire to adjust the angle of the riser model, which was weighted to hang beneath the rearward boat. Photo courtesy of 2H. [158,788 bytes] Two model risers were used for the towing trials: one was an unmodified pipe, and the other, shown above in the photo on the left, (right) fitted with vibration suppression strakes designed by 2H. The model risers were fitted with accelerometers, enclosed in yellow canisters (photo above on the right), fitt...

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