Simulation of Draupner freak wave impact force on a vertical truncated cylinder

In the authors' previous work, a Draupner freak wave was produced in the wave tank, and the particle velocities and wave impact force on a vertical truncated cylinder were measured. This paper presents simulations of the impact forces and wave kinematics and compares them with the experimental data. In addition, high-frequency components contained in the impact force and freak wave have been examined by continuous wavelet transform. The large high-frequency components make the freak wave and impact force strongly nonlinear. The simulated impact force due to the field (Draupner) wave is slightly lower than that of the laboratory freak wave. The freak wave impact forces are nearly the same as those of the previously studied extreme transient waves.