流影响下非线性波对大尺度物体的载荷

NONLINEAR WAVE FORCES ON LARGE SCALE CYLINDERS UNDER THE EFFECTS OF CURRENT

在一定假设下,利用均匀流上Stokes波仍为Stokes波和波流作用前后质量、动量、能量守恒及色散关系,求出水流中波要素的变化和波流场势函数。以此势函数为入射势,采用每一时刻边界元求解的时间步进法,计算物体上的波流力,结果与文献符合较好。

Under certain hypotheses, Stokes waves on uniform current are still Stokes waves with variant parameters. The effects of current on wave parameters are obtained by the conservation of mass, momentum, energy and dispersion relation. So the velocity potential of wave-current field can be determined. By means of this velocity potential as incident velocity potential, the nonlinear wave-current forces on large scale cylinders are obtained by time-stepping method in which at each time step the velocity potential is calculated by an intergral equation based on Green's theorem. The results are in good agreement with[1].