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首页> 外文期刊>Ocean Engineering >Verification of a hybrid model test method for a deep water floating system with large truncation factor
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Verification of a hybrid model test method for a deep water floating system with large truncation factor

机译：大截断因子的深水漂浮系统混合模型测试方法的验证

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摘要

The hybrid model test method has been regarded as the most reliable method to investigate the dynamics of deepwater floating systems when the wave basin is not large enough to conduct the full water depth model tests at reasonable model scales. In order to get the reliable experimental results, the truncation factor should be less than 5. However, as the offshore oil and gas industry moves towards deeper waters, the model tests of floating structures carried out at the wave basin with reasonable model scales need to be revamped. The objective of the present study is to investigate the feasibility of largely truncated hybrid model test for the deep water floating systems. The hybrid model test techniques and the dynamic behaviors of the truncated mooring lines are also studied. In order to achieve the static and dynamic similarities easily in the largely-truncated model tests, an optimization design method of the truncated mooring system is proposed, and the similarities of platform motion responses as well as the mooring lines dynamics are investigated in the largely-truncated model tests. To verify the present method, a deepwater semisubmersible system operated in 1500 m and 1000 m water depth is truncated to 200 m water depth based on the static equivalent principle (the truncation factors are 7.5 and 5 respectively), and the dynamically similar design is implemented to the model tests which are carried out at China Ship Scientific Research Center wave basin. The motion responses of the platform and the mooring line dynamics are obtained. These experimental results are used to compare with the numerical simulation, which is based on the full time domain coupled dynamic analysis method. The comparisons show that the numerical results are in good agreement with the model measurements.
机译：当波浪盆地不够大而无法在合理的模型规模下进行全水深模型测试时，混合模型测试方法被认为是研究深水漂浮系统动力学的最可靠方法。为了获得可靠的实验结果，截断因子应小于5。但是，随着近海石油和天然气工业向更深水域发展，在波浪盆地进行的浮动结构模型试验需要合理的模型规模。被改造。本研究的目的是研究在深水漂浮系统中进行大体截断的混合模型测试的可行性。还研究了混合模型测试技术和截断式系泊缆的动力特性。为了在截短的模型测试中轻松实现静态和动态的相似性，提出了一种截短的系泊系统的优化设计方法，并研究了平台运动响应和系泊动力学的相似性。截断的模型测试。为了验证本方法，基于静态当量原理（截断因子分别为7.5和5）将工作在1500 m和1000 m水深的深水半潜水系统截断为200 m水深，并实现了动态相似的设计在中国船舶科学研究中心波浪盆地进行的模型试验。获得平台的运动响应和系泊缆动力学。将这些实验结果与基于全时域耦合动态分析方法的数值模拟进行比较。比较表明，数值结果与模型测量结果吻合良好。

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  • 来源
    《Ocean Engineering》 |2014年第1期|245-254|共10页
  • 作者

    Chunyan Ji; Sheng Xu;

  • 作者单位

    School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China, Jiangsu University of Science and Technology, 2 Mengxi Road, Zhenjiang, Jiangsu, China;

    Centre for Marine Technology and Engineering (CENTEC), Instituto Superior TecnicoUniversidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hybrid model tests; Truncation; Deepwater semisubmersible; Coupled dynamic analysis;

    机译：混合模型测试;截断;深水半潜式;耦合动力分析;

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