The random nonlinear differential equation of the rolling motion of ships in random beam waves is established considering the nonlinear damping, nonlinear restoring moment, and the random waves.

Dynamic response analysis model for large diameter cylinder breakwater under the action of random wave;

Study on bottom shear stress of laminar boundary layer under the action of random waves;

Experimental research on random wave impact on three-dimensional structure in splash zone;

A nonlinear model for nonbreaking shoaling random waves;

The random nonlinear differential equation of ships rolling mo- tion in random seas is established with considering the nonlinear damping,nonlinear restoring moment and the random waves.

In this dissertation, the progress in the researches of spatial coherence of random waves is reviewed.

The hydrodynamic characteristics and the pile grouping effect of the transverse forces on three piles in side-by-side arrangement and tandem arrangement are experimentally investigated in random waves and the relations between the transverse coefficients and KC number and 1/D are given in this paper.

The spectral densities of nonlinear random waves, the velocities and accelerations of water particles are obtain.

The random waves, non-linear damp and ship non-linear restore moment are taken into consideration and the ship rolling non-linear differential equation is established.

Dynamic parameter measuring unit (DPMU) is used to predict the ship dynamic stability in random seas.