- 【Updated on May 12, 2025】 Integration of CiNii Dissertations and CiNii Books into CiNii Research
- Trial version of CiNii Research Knowledge Graph Search feature is available on CiNii Labs
- Suspension and deletion of data provided by Nikkei BP
- Regarding the recording of “Research Data” and “Evidence Data”
Study on Simplified Formula for Long-term Predictions of Ship Response in Waves for Hull Structural Design
-
- Matsui Sadaoki
- 国立研究開発法人 海上・港湾・航空技術研究所 海上技術安全研究所
-
- Shinomoto Kyohei
- 一般財団法人 日本海事協会
-
- Sugimoto Kei
- 一般財団法人 日本海事協会
Bibliographic Information
- Other Title
-
- 船体構造設計のための波浪中応答長期予測値の簡易算式に関する研究
- センタイ コウゾウ セッケイ ノ タメ ノ ハロウ チュウ オウトウ チョウキ ヨソクチ ノ カンイ サンシキ ニ カンスル ケンキュウ
Search this article
Description
<p>In this paper, the authors proposed simplified formulae of the long-term maximum wave-induced vertical motion (surge acceleration, heave acceleration, and pitch angle) of exceedance probability of 10-8 expressed as the explicit function of dominant hullform parameters. First, the dominant factors of the long-term maximum response were identified in a general discussion that did not depend on the types of response, and the methodology for the development approach of simplified formulae was demonstrated. In the process, the ratio of long-term maximum response and peak value of response amplitude operator (RAO) was defined as “Equivalent Regular Wave height" HERW. Then, it was clarified that HERW was dominated by the kurtosis of nondimensional RAO and peakwavelength of RAO as scale-dependent parameter. Furthermore, it was confirmed that long-term maximum response can be expressed by only the peak value of RAO when the RAO has certain properties; “kurtosis-invariant" and “peak value and peak-wavelength compatibility". Based on those consideration, as concrete examples, simplified formulae of the long-term maximum response of the vertical motion were derived. The obtained results were verified by comparison with numerical analysis using actual 154 merchant ships. The proposed development approach of simplified formula is effective regardless of the ship type as well as type of response. However, it should be noted that the proposed method is based on linear theory and is verified only for low speeds. Consideration of speed effect in high-Froude number and nonlinearly should be discussed in future work.</p>
Journal
-
- Journal of the Japan Society of Naval Architects and Ocean Engineers
-
Journal of the Japan Society of Naval Architects and Ocean Engineers 34 (0), 209-222, 2021
The Japan Society of Naval Architects and Ocean Engineers