弧墙-浮式防波堤水动力性能数值模拟

Numerical simulation of hydrodynamic performance of arc-wall-floating breakwater

为提升浮式防波堤的消波性能,提出一种弧墙-浮式防波堤,基于不可压缩性流体理论和VOF方法,使用计算流体力学软件Star-ccm+建立二维数值模型,并验证数值模型的准确性。应用该数值模型对弧墙-浮式防波堤在不同水平宽度、相对高度及相对波高等条件下的水动力性能进行模拟研究,总结各参数对防波堤透射系数、反射系数及运动响应的影响规律,识别消波性能最优的防波堤结构参数。结果表明,透射系数随水平宽度的增大而增大,周期小于1.4 s时透射系数能稳定维持在0.6以下;反射系数在周期1.6 s或1.8 s时会有一定程度的减小;运动响应随水平宽度和相对高度的增大而增大。

To improve the wave attenuation performance of floating breakwaters,an arc-wall-floating breakwater is proposed.Based on the theory of uncompressible fluids and VOF method,a two-dimensional numerical model is established by using the computational fluid mechanics software Star-ccm+,and the accuracy of the numerical model is verified.The numerical model is used to simulate and study the hydrodynamic properties of arc-wall-floating breakwaters under different horizontal widths,relative heights and relative wave heights.The influence of various parameters on the transmission coefficient,reflection coefficient and motion response of the breakwater is concluded,and the structural parameters of the breakwater with the best wave attenuation performance are identified.The results show that the transmission coefficient increases with the increase of the horizontal width,and the transmission coefficient can be stably maintained below 0.6 when the period is less than 1.4 s.The reflection coefficient decreases to a certain extent when the period is 1.6 s or 1.8 s.The motion response increases with the increase of horizontal widths and relative heights.