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在摇板式造波机生成的二维数值波浪水池中进行了潜没圆柱的模拟绕射试验。先在频率域中确定造波机的运动形式 ,并在时间域中模拟摇板运动生成带有波前的高品质Stokes波的过程 ,作为入射波条件。数值造波和数值绕射试验采用边界积分方程的时间步进法 ,探讨了在自由面和板面交点处自由面条件与物面条件的相容性、开边界辐射面边界条件、时间与空间域上的数值离散方法等 ,得到了稳定、合理的波形和波浪力时域非线性结果 ,并与相应的频域二阶解的结果作了比较 ,证实了本数值波浪水池试验方法的适用性。
In the two-dimensional numerical wave pool generated by a rocking wave machine, a submarine cylindrical simulated diffraction experiment was carried out. Firstly, the wave form of the wave machine is determined in the frequency domain, and the high-quality Stokes wave with wavefront is simulated in the time domain as the incident wave condition. The time-step method of boundary integral equation is used to study the numerical wave-making and numerical diffraction experiments. The compatibility of the free-surface condition and the object-surface condition at the intersection of the free surface and the plate surface is discussed. The boundary conditions, the time and space The numerical discrete method and so on of the domain, obtained the stable and reasonable time-domain non-linear results of the waveform and the wave force, and compared with the corresponding results of the second-order solution of the frequency domain, confirming the applicability of the numerical wave pool test method .