多浮体群遮效应的CFD模拟与分析

CFD simulation and analysis on the cloaking phenomenon of multi-floating bodies

为了研究基于群遮效应的被多浮体环绕的中心浮体保护问题,本文利用粘流理论建立了多浮体水动力计算的数值模型。数值模拟了多浮体间的群遮效应,验证了群遮效应对中心浮体的保护作用,并进一步分析了浮体周围波面分布与波浪载荷变化的对应关系。结果表明:考虑粘性的数值模型可准确地模拟群遮效应;通过合理选取外围浮体群的几何参数,中心浮体的波漂移力可以得到显著降低;中心浮体波漂移力的大小与浮体迎浪、背浪侧间波面抬高的差值密切相关。

Herein, a numerical model was built based on the viscous flow theory to analyze the hydrodynamic performance and investigate the issue of protecting the central floating body surrounded by multiple floating bodies based on the cloaking phenomenon. The cloaking phenomenon was numerically simulated among multi-floating bodies, and the protection function of the cloaking phenomenon on the central floating body was also verified. Then, the relationship between the wave distribution around the floating body and the wave load change was further analyzed. Results show that the numerical model considering viscosity can accurately simulate the cloaking phenomenon and that the wave drift force acting on the inner floating body can be significantly reduced by reasonably selecting the geometric parameters of the outer floating bodies. Moreover, the magnitude of the wave drift force acting on the central floating body is closely related to the difference of wave elevations between the weatherside and leeside of the floating body.