船舶風圧力データの力学モデルによる解析

概要

論文の詳細を見る
The authors proposed physical-mathematical model consisting of six elemental forces of fluid-dynamics and stall phenomena. These forces influence ship motion, and in this study the entire range of wind direction was modeled. The equations below describe forces: [numerical formula][numerical formula][numerical formula] u'=cosβ=u/U v'=-sinβ=v/U Analysis results of data previously presented in papers about wind forces acting on various ships are summarized below. 1) The authors proposed mathematical model can be applied to many ship types, and it well describes the respective wind forces of ships. 2) The pattern of lateral force vs. wind direction (Y'-β) should be estimated from the ratio of the area between the superstructure and the vessel's hull. 3) Yaw moment, due to cross flow drag N'_<vvv>v'^3, should be estimated from the superstructure's longitudinal location on the hull. 4) There are correlations between coefficients of wind forces (Y'_<uuv>, Y'_<vvv>, m'_x-m'_y+N'^*_uuv) and aspect ratios of the ships (k). 5) A few longitudinal force coefficients of stall effect should be estimated from coefficients of Y'_<uuv> and Y'_<uuvvv> determined by using lateral forces Y'.
社団法人日本航海学会の論文
1990-09-20