Comparison of hydrodynamic loading models for vertical cylinders in nonlinear waves

Experimental investigations of secondary load cycle formation in wave force on a circular cylinder under steep regular waves

“…The wave force can be calculated by Morison's equation in which the water particle velocity is based upon the incident wave without the presence of the structure. The method can estimate the amplitude of wave force well, but it can't predict higher harmonic components which are apparent in steep waves (Mockut ė et al, 2017). It is supposed that some strongly nonlinear phenomena occur under steep waves, which can't be explained with Morison's equation.…”

Comparison of Nonlinear Wave-Loading Models on Rigid Cylinders in Regular Waves

“…The slc can be seen to occur around t = [0.5 − 0.75] s in the experimental loading ( Figure 4b). A past preliminary study [35] has already shown that not even with fully nonlinear BEM wave kinematics with Morison equation (inertia only as well as full formulation including quadratic drag) or Rainey theory manage to capture the secondary load cycle. In this extended study the newly derived finite-depth FNV theory was also considered, and is therefore shown in Figure 4b with linear and fully nonlinear wave kinematics as input (dashed black and dark red lines).…”