Numerical Study on the Dynamic Response of a Semi-submersible Platform with Experimental Validation

investigated both numerically and experimentally in regular
and irregular waves. In the numerical model, the equilibrium
conditions were developed and solved in time domain using an
iterative incremental numerical scheme. The wave force
calculations were based on the Morison Equation applied at
the instantaneous position of the structure. Mooring system
contribution to dynamic behavior was evaluated numerically
using nonlinear catenary equations. Experimentally, a twin
hulled semi-submersible model in a scale of 1:100 was tested in
regular and irregular waves with the model oriented in the
head, beam and quartering directions. The experimental
measurements validated the accuracy of the numerical model.
Keywords- Equation of Motion (EOM); Response Amplitude
Operator (RAO); Semi-submersible model; Time domain
analysis; Wave basin testing