Spar平台主体垂荡-月池流体耦合运动模型试验研究  

Model experimental research on the coupled motion of heave and moonpool water of the Spar platform

作　　者：刘利琴[1] 张永恒[1] 满金双 刘春媛[1] 何鑫[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《哈尔滨工程大学学报》2015年第3期287-291,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51179125)

摘　　要：针对Spar平台主体垂荡-月池流体耦合运动问题,采用模型试验的方法进行了研究。设计了可拆卸的月池底部挡板及垂荡板,通过静水中自由衰减试验及波浪中强迫运动试验,分析了月池流体对平台主体垂荡运动的影响。结果表明:月池流体显著增加了平台垂荡阻尼;当波浪周期接近平台垂荡固有周期时,月池流体对平台主体垂荡有抑制效应,且抑制程度与月池开孔面积有关;对于较大的底部挡板开孔率,平台主体垂荡RAO有2个峰,当波浪周期接近月池流体垂向振动固有周期时,也会激起平台主体较大的垂荡运动。实际中采用半开口月池时,应考虑月池流体对平台主体垂荡运动的影响。Model experiments were carried out to study the coupled motion of heave and moonpool water of the Spar platform in this paper. The dismountable heave plates and guide plates on the bottom of the moonpool were designed. The influence of the fluid inside the moonpool on the heave motion of platform was analyzed according to the attenuation test in still water and the forced motion test in waves. The results indicated that the moonpool water increases the heave damping of platform. However,when the wave period is close to natural period of platform heave,the fluid of moonpool restrains the platform heave and the degree depends on the open area of guide plate. Nevertheless,for the larger open ratio of guide plate,the heave RAO curve has two peaks and the platform will present larger heave when the wave period is close to the natural period of moonpool water＇s vertical motion. In practice,if the semi-opening moonpool is used,the effect of moonpool water on the platform heave should be considered.

关 键 词：SPAR平台 垂荡 月池 模型试验 阻尼 垂荡RAO 耦合运动 

分 类 号：P751[交通运输工程—港口、海岸及近海工程] TB123[天文地球—海洋科学]