基于CFD方法研究月池内部流体对Spar平台垂荡运动的影响

文章采用CFD方法研究了Spar平台月池内部流体对平台垂荡运动的影响.建立了二维和三维的数值水池,并获得了稳定的规则波.针对月池的不对开口率计算了Spar平台的垂荡阻尼系数,分析了月池内部流体的运动特性,并研究了开口率对平台垂荡运动的影响.研究表明,半封闭月池时Spar平台的垂荡阻尼有所增大,月池的开口率影响月池内部流体的运动以及平台垂荡运动的RAOs.在实际中,对月池开口率的优化设计可以适当地降低Spar平台的垂荡运动.

Effects of Water Inside Moon Pool on the Heaving Motions of a Spar Platform by CFD Method

Based on the CFD method, this paper studied the effects of water inside the moon pool on the heaving motions of a Spar platform. The two-dimension and three-dimension numerical wave tanks were established and the stable regular waves were obtained by the numerical wave making. The damp-ing coefficients of main hull of the platform for different opening ratios of the moon pool were calculated. The motion characteristics of the water inside the moon pool were analyzed, and the ef-fects of opening ratios of the moon pool on the platform heaving were investigated. The results show that the damping of platform heaving increases for semi-closed moon pool of the Spar platform. The opening ratios of moon pool will affect the piston motion amplitude of water inside the moon pool and RAO of the platform heaving motions. In practice, an optimal opening ratio of the moon pool can be designed to reduce the heaving motions of the Spar platform.