vertical cylinder; circular cylinder; surface-piercing cylinder; hydrodynamic loads; forces and moments; uniform current; waves free oscillations; forced oscillations; in-line oscillations; compliant air bearing; electric servo motor; control systems; towing tank; transducers; data acquisition system; digital filter; database
IMD conducted a series of experiments in the Clearwater Towing Tank with a large(0.8m diameter, 3.3m long) vertical surface-piercing circular cylinder. The objective of the experiments was to measure the hydrodynamic loads on this cylinder while it undergoes free and forced in-line oscillations, while exposed to various combinations of calm water, uniform current and waves. The simulated conditions correspond to those that a single leg of a Tension Leg Platform experiences during slow drift oscillations in waves. This report also defines the scope of the experiments and describes the experimental procedures, and finally outlines future experiments which would continue the study. A companion report presents the data in coherent form, and provides preliminary analysis of the data. That report makes suggestions for further analysis of the data.
National Research Council of Canada. Institute for Marine Dynamics
St. John's, Newfoundland
Laboratory Memorandum (National Research Council of Canada. Institute for Marine Dynamics), no. LM-1992-13.