深水浮式平台截断物理模型试验的阻尼等效补偿研究

项目名称： 深水浮式平台截断物理模型试验的阻尼等效补偿研究

项目编号： No.51209037

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 水利科学与海洋工程学科

项目作者： 乔东生

作者单位： 大连理工大学

项目金额： 25万元

中文摘要： 深水浮式平台物理模型试验在解决实际工程问题和科学研究中起关键作用。受水池条件限制，目前唯一实际应用的"被动截断+数值模拟"混和模型试验方法由于其截断锚泊线和全水深锚泊线动力特性差异，其最大误差可达30%。针对此现状本项目首先研究锚泊系统阻尼的作用机理，建立其计算方法；其次建立基于静力和低频阻尼等效的截断锚泊系统优化设计模型；然后提出"被动截断+锚泊阻尼补偿"模型试验方法：研究截断锚泊系统阻尼补偿方法并研发其补偿装置，建立"被动截断+锚泊阻尼补偿"模型试验技术，实现由物理试验可直接给出运动响应预报结果；进而研究平台及锚泊系统的响应特征，在时域内建立其非线性全耦合计算模型；最后结合半潜式平台和Spar平台，分别进行被动截断和粘滞阻尼器补偿模型试验研究。 通过本项目研究，建立一套真实可靠预报深水浮式平台运动响应的物理模型试验方法和技术，为我国南海油气田开发亟需的深水浮式平台设计建造提供可靠依据。

中文关键词： 浮式平台；优化设计；阻尼补偿；等效水深截断；模型试验

英文摘要： Physical model tests of deep water floating platform play a key role in solving practical engineering problem and scientific research. At present, hybrid model tests which combined a passive truncation with subsequent numerical simulation is the only practical application because of the limited dimension of wave basin, but the maximum predicting error may reach 30% due to the difference of dynamic characteristic between the truncated and full-depth mooring line. In terms of this situation, the effect mechanism of mooring induced damping and its calculation method are investigated firstly. Secondly, the optimization design model of truncated mooring system based on static equivalent and mooring damping equivalent in low frequency range is investigated. And then, a new model test method combining passive truncation with mooring damping compensated system is proposed. The damping compensation method in truncated mooring system is investigated and its compensation device is developed. Model test technology of passive truncation combining with mooring damping compensated system is established, and predicting results of motion responses can be directly obtained via physical test. Furthermore, characteristics of response between platform and mooring system are investigated, and its nonlinear full coupling calculation m

英文关键词： floating platform；equivalent water depth truncation；optimization design；damping compensation；model test