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首页> 外文期刊>Journal of offshore mechanics and arctic engineering >Analysis Methodology for Vortex-Induced Motion (VIM) of a Monocolumn Platform Applying the Hilbert-Huang Transform Method
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Analysis Methodology for Vortex-Induced Motion (VIM) of a Monocolumn Platform Applying the Hilbert-Huang Transform Method

机译：应用希尔伯特-黄变换方法的单柱平台涡激运动分析方法

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摘要

Vortex-induced motion (VIM) is a highly nonlinear dynamic phenomenon. Usual spectral analysis methods, using the Fourier transform, rely on the hypotheses of linear and stationary dynamics. A method to treat nonstationary signals that emerge from nonlinear systems is denoted Hilbert-Huang transform (HHT) method. The development of an analysis methodology to study the VIM of a monocolumn production, storage, and offloading system using HHT is presented. The purposes of the present methodology are to improve the statistics analysis of VIM. The results showed to be comparable to results obtained from a traditional analysis (mean of the 10% highest peaks) particularly for the motions in the transverse direction, although the difference between the results from the traditional analysis for the motions in the in-line direction showed a difference of around 25%. The results from the HHT analysis are more reliable than the traditional ones, owing to the larger number of points to calculate the statistics characteristics. These results may be used to design risers and mooring lines, as well as to obtain VIM parameters to calibrate numerical predictions.
机译：涡旋运动（VIM）是一种高度非线性的动态现象。使用傅立叶变换的常用频谱分析方法依赖于线性和平稳动力学的假设。 Hilbert-Huang变换（HHT）方法被称为处理非线性系统中出现的非平稳信号的一种方法。提出了一种分析方法的研究，以研究使用HHT的单柱生产，存储和卸载系统的VIM。本方法的目的是改进VIM的统计分析。结果表明，与传统分析获得的结果（最高峰的10％的平均值）相当，尤其是横向运动，尽管传统分析的结果与直列方向的运动之间存在差异显示相差约25％。 HHT分析的结果比传统方法更可靠，这是因为要计算统计特征的点数更多。这些结果可用于设计立管和系泊缆绳，以及获得VIM参数以校准数值预测。

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  • 来源
    《Journal of offshore mechanics and arctic engineering》 |2012年第1期|p.011103.1-011103.7|共7页
  • 作者

    Rodolfo T. Gongalves; Guilherme R. Franzini; Guilherme F. Rosetti; Andre L. C. Fujarra; Kazuo Nishimoto;

  • 作者单位

    TPN-Numerical Offshore Tank,Department of Naval Architecture and Ocean Engineering,Escola Politecnica-University of Sao Paulo,Avenida Professor Mello Moraes,2231 Cidade Universittria,Sao Paulo, SP 05508-900, Brazil;

    TPN-Numerical Offshore Tank,Department of Naval Architecture and Ocean Engineering,Escola Politecnica-University of Sao Paulo,Avenida Professor Mello Moraes,2231 Cidade Universittria,Sao Paulo, SP 05508-900, Brazil;

    TPN-Numerical Offshore Tank,Department of Naval Architecture and Ocean Engineering,Escola Politecnica-University of Sao Paulo,Avenida Professor Mello Moraes,2231 Cidade Universittria,Sao Paulo, SP 05508-900, Brazil;

    TPN-Numerical Offshore Tank,Department of Naval Architecture and Ocean Engineering,Escola Politecnica-University of Sao Paulo,Avenida Professor Mello Moraes,2231 Cidade Universittria,Sao Paulo, SP 05508-900, Brazil;

    TPN-Numerical Offshore Tank,Department of Naval Architecture and Ocean Engineering,Escola Politecnica-University of Sao Paulo,Avenida Professor Mello Moraes,2231 Cidade Universittria,Sao Paulo, SP 05508-900, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    vortex-induced motion (VIM); hilbert-huang transform (HHT) method; model tests; nonstationary signals; monocolumn platform;

    机译：涡激运动（VIM）;希尔伯特-黄变换（HHT）方法;模型测试;非平稳信号;单柱平台;

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