气囊型浮式防波堤挡浪消波的数值模拟

Numerical simulation of airbag type floating breakwater on wave blocking and wave elimination

临时挡浪设施在海况较差的海域为施工船舶提供一定的避浪掩护时使用。气囊型浮式防波堤具有运输方便、投放便捷以及造价低廉的特点,成为了首选的挡浪消波措施之一。通过调整网格划分方式、控制时间步长以及对自由液面网格局部加密等措施,建立了稳定的数值波浪水槽。采用原物理模型试验比尺建立气囊型浮式防波堤的水动力模型,并利用试验结果验证了数值计算方案的准确性。计算结果表明:距离挡浪模型后3 m范围内的计算结果精确,波高值误差在1%以内;在该数值模拟方案下计算值随时间的变化规律与试验结果吻合得较好。该数值模拟方案具有可行性和有效性,数值模拟结果具有较高的参考价值,可以为后续各临时挡浪设施选型研究提供计算基础。

Temporary wave blocking facilities are used to provide certain protection for construction ships with poor sea conditions. Airbag-type floating breakwater with convenient transportation, convenient delivery, and low cost has become one of the preferred wave blocking and wave elimination measures. A stable numerical wave flume is established by adjusting the grid division, controlling the time step, and encrypting the free liquid surface network. The hydrodynamic model of airbag type floating breakwater is established by using the same scale of the original physical model test, and the accuracy of the numerical calculation scheme is verified by the test results under the condition of the physical model test. The calculation results show that the calculation results within the range of 3 m after blocking the wave model are accurate, and the error of the wave height is within 1%. The variation law of the calculated value with time under the numerical simulation scheme is in good agreement with the test results. The numerical simulation scheme is feasible and effective, and the numerical simulation results have an available reference, which can provide a calculation basis for the subsequent research on the selection of various temporary wave containment facilities.