文章基本信息

标题：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
本地全文：下载
作者：松井貞興 ; 篠本恭平 ; 杉本圭等
期刊名称：日本船舶海洋工学会論文集
印刷版ISSN：1880-3717
电子版ISSN：1881-1760
出版年度：2021
卷号：34
页码：209-222
DOI：10.2534/jjasnaoe.34.209
语种：Japanese
出版社：社団法人日本船舶海洋工学会
摘要：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.