文章基本信息

标题：船体運動の応答関数における支配パラメータの抽出と簡易推定式の提案
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：2022
卷号：35
页码：43-54
DOI：10.2534/jjasnaoe.35.43
语种：Japanese
出版社：社団法人日本船舶海洋工学会
摘要：In this study, the authors proposed explicit formulae of the surge, heave, and pitch motion of ship in regular waves expressed as the explicit function of principal hull-form parameters and extracted dominant hull-form parameters of those for simple estimation of the wave loads for the ship structural design. In order to develop the estimation formulae which have enough accuracy and wide range of applicability, the theoretical approach was adopted based on the linear seakeeping theory. In the process of deriving formulae, the equations of motion were simplified based on the relationship of the fluid forces that cancel out each other and the approximation that the ship speed is slow. For both surge and pitch motion, 1-DOF model, in which interaction effects were ignored, was applicable and the dominant parameters were successfully extracted. On contrast, heave motion in head sea was significantly affected by pitch motion especially for full loading conditions. Although the mechanism of interaction effect and the factor were clarified, it was difficult to express simple form and extract dominant parameters. However, in beam sea, the heave motion can be expressed as the 1-DOF model, and the dominant parameter was extracted straightforwardly. By using the extracted dominant parameters, the approximated formulae of peak value of the response amplitude operators of the vertical motion were proposed. It was confirmed that the proposed formulae have enough accuracy regardless of ship size and ship type through validation compared with numerical calculation by using actual hull-forms of 77 ships × 2 loading conditions.