The dynamic motion of underwater cable systems under hydrodynamic load is investigated using the system formulation of bond graph technique. The cable system can be a single mooring line or a multimooring system with nonuniform cables. The dynamic behavior of the cable systems due to fluid flow excitations, such as strumming force and surface waves, is calculated in this paper by using digital simulation programs. The result shows that the complicated transient motion of underwater cable systems can be treated successfully with this technique.

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