摘要
海上浮式旅游平台作为新型海洋结构具有较好的发展前景。其中浮式环形平台结构的内域水体可作为浮式游艇港,但内域水体封闭性的增加也将引起类似月池共振的水体共振问题,影响码头泊稳条件。采用线性势流频域方法研究了平台吃水深度、结构运动响应和平台开口形状对内域水体共振响应特征的影响。结构吃水深度增加,水体共振频率向低频方向偏移,第0~2阶共振幅值随吃水深度增加而增加;结构运动引起水体共振频率向高频方向偏移,并且结构运动响应共振区间与第0~3阶水体共振频率范围重合,纵摇运动对内域水体共振模态分布影响较大,其他自由度影响较小。为抑制内域水体共振,提出在水面线处增设薄板和人工阻尼区域两种方案,结果表明:增设薄板可有效降低高频处水体共振,添加阻尼区域可在整个波浪频率范围内达到抑制水体共振的目的。
As a new marine structure,the offshore floating-ring tourism platform has good development prospects.The water body within the floating-ring structure can be used as a floating yacht port.However,the increase in the water closure may also cause the water body resonance problem similar to the moon pool resonance,which can affect the conditions of wharf berthing stability.To study the influence of the platform draft,structural motion response and opening shape of the platform on the resonance response characteristics of the water body within the platform,the linear potential flow frequency domain method is applied.When the draft depth of the structure increases,the water body resonance frequency shifts toward the low frequency direction and the co-amplitude values of 0-2 order increase with the draft depth.The motion of the structure causes the water body resonance frequency shifting toward the high frequency direction and the resonance range of the structural motion response coincides with the range of water resonance frequency of 0-3 order.In addition,the pitch motion has a great influence on the distribution of resonance mode,while the influences of other freedom degrees are smaller.In order to suppress the inner water resonance,two schemes are proposed to add a thin plate or an artificial damping area at the surface line of the water.The results show that the adding of thin board can effectively reduce the water resonance in the range of high frequency and the adding of damping area can achieve the purpose of inhibiting water resonance within the entire range of wave frequency.
作者
张璐瑶
丁军
毛艳军
马小舟
ZHANG Luyao;DING Jun;MAO Yanjun;MA Xiaozhou(Dalian University of Technology,Faculty of Infrastructure Engineering,Dalian 116024,China;China Ship Scientific Research Center,Wuxi 214082,China)
出处
《海岸工程》
2023年第1期36-43,共8页
Coastal Engineering
基金
工信部装函--[2019]357号
关键词
浮式平台
水体共振
吃水深度
结构运动
floating platforms
water body resonance
draft depth
structural motion
