Study on Analysis of Non-stationary Ship Motion Data

船舶非平稳运动数据分析研究

• 批准号: 17560706
• 负责人: ISEKI Toshio
• 金额: $ 2.31万
• 依托单位: Tokyo University of Marine Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17560706/
• 关键词: TVAR modeling; Instantaneous spectral analysis; Parametric rolling; Instantaneous bispectral analysis; Tri-spectral analysis; non-linear ship motions; Variation of non-linear restoring moment; 時変係数多変量自己回帰モデル; 瞬間クロススペクトル; 瞬間相対ノイズ寄与率; クロスバイスペクトル

The non-linear ship responses, such as parametric rolling, have become the key issues in the research field of ship stability. After an accident of a post-Panamax container ship happened in 1998, the experimental and theoretical studies in the time domain are carried out vigorously and revision of the Intact Stability Code of the International Maritime Organization (IMO) is now under way.The main objective of this research is development of new techniques for analyzing the spectral structure of non-stationary ship responses. The research work was continued for three years from the theoretical and experimental viewpoints. The results are summarized below:1. Theoretical results: The non-linear pitching motion in following seas and its fluctuating skewness were investigated. Since the geometrical phase-relationship between waves and ship's hull can be considered as the main cause of the fluctuating skewness, the phenomenon was simulated by using simplified equations of motion for a single-degree-of-freedom and the instantaneous bispectral analysis, which is based on Time-varying coefficient autoregressive (TVAR) modeling and an extension of the instantaneous power spectral analysis, was proposed. The effectiveness of the proposed method was shown for analyzing the transition of skewness of non-linear ship responses. Finally, the characteristics of the parametric rolling were confirmed by applying the tri-spectral analysis.2. Experimental results: On board measurements were carried out using the training ship Shioji-maru and the radar wave observation system at Nojima cape was used to obtain reliable wave data in corporation with Japan Coast Guard. Furthermore, a 1/40 scale self propulsive model ship was made up by loading the hand-made control unit, motion sensor and RS232C wireless communication unit to measure the large amplitude ship motion data.

参数横摇等船舶非线性响应已成为船舶稳定性研究领域的关键问题。 1998年超巴拿马型集装箱船事故发生后，时域的实验和理论研究蓬勃开展，国际海事组织（IMO）完整稳定规则的修订工作正在进行中。本研究的主要目的是开发分析非平稳船舶响应谱结构的新技术。从理论和实验的角度，研究工作持续了三年。研究结果如下： 1．理论结果：研究了随波运动的非线性纵摇运动及其脉动偏斜度。由于波浪与船体之间的几何相位关系可以被认为是脉动偏度的主要原因，因此利用简化的单自由度运动方程模拟了这种现象，并提出了基于时变系数自回归（TVAR）建模和瞬时功率谱分析扩展的瞬时双谱分析。该方法在分析非线性船舶响应偏度转变方面的有效性得到了证明。最后，通过三谱分析确定了参数轧制的特性。 2．实验结果：使用盐路丸训练舰进行船上测量，并与日本海上保安厅合作，利用野岛岬的雷达波观测系统获得可靠的波浪数据。此外，通过装载手工制作的控制单元、运动传感器和RS232C无线通信单元，搭建了一艘1/40比例的自航模型船，用于测量船舶的大幅运动数据。

项目成果

非線形船体応答のバイスペクトル解析-II.-非線形復原力変動の影響-

非线性船体响应的双谱分析-II.-非线性稳定性波动的影响-

• 发表时间: 2007
• 期刊: 日本航海学会論文集 第118号
• 作者: Toshio;Iseki;Toshio Iseki;井関 俊夫;Toshio Iseki;井関俊夫
• 通讯作者: 井関俊夫

Prediction Methods for Parametric Rolling with Forward velocity and Their Validation -Final Report of SCAPE Committee (PART 2)-

前向速度参数滚动预测方法及其验证 -SCAPE 委员会最终报告（第 2 部分）-

• 发表时间: 2008
• 期刊: Proceedings of the 6th Osaka Colloquium on Seakeeping and Stability of Ships
• 作者: Hirotada Hashimoto;Naoya Umeda;Yoshitaka Ogawa;Haruktmi Taguchi;Toshio Iseki;Gabriele Bulian;Naoji Toki;Shigesuke lshida;Akihiko Matsuda
• 通讯作者: Akihiko Matsuda

Instantaneous Spectral Analysis of Non-stationary Ship Motion Data

非平稳船舶运动数据的瞬时谱分析

• 发表时间: 2006
• 期刊: Proc. of 25th International Conference on Offshore Mechanics and Arctic Engineering OMAE2006-92197
• 作者: Toshio;Iseki
• 通讯作者: Iseki

Bispectral Analysis of Non-linear Ship Response

非线性船舶响应的双谱分析

• 发表时间: 2007
• 期刊: Proceedings of the 17th International Offshore and Polar Engineering Conference(ISOPE-2007) Vol.4
• 作者: Toshio;Iseki;Toshio Iseki;井関 俊夫;Toshio Iseki
• 通讯作者: Toshio Iseki

非線形船体応答のバイスペクトル解析-II-非線形復原力変動の影響-

非线性船体响应双谱分析-II-非线性稳定性波动的影响-

• 发表时间: 2007
• 期刊: 日本航海学会論文集 第118号
• 作者: Toshio;Iseki;Toshio Iseki;井関俊夫
• 通讯作者: 井関俊夫