船舶復原性より見たる安全示數
スポンサーリンク
概要
- 論文の詳細を見る
When a ship, which is rolling among waves around the steady heel due to wind, is attacked by a sudden gust, sometimes accompanied by the rudder action, if the work done by the gust and rudder action be greater than the reserve of her stability, she capsi es. The condition, that the capsize may not occur, can be expressed by the following relations : [numerical formula] where S_d : dynamical stability arm, i.e. the area of the stability curve divided by the weight of the ship, D_w : heeling moment arm (the speed of the gust assumed to be 1.4 time of the mean wind speed), θ_r : range of the stability curve, C_w : reduction coefficient determined from the fact of the reduction of wind speed near the sea level, θ_0 : rolling angle. D_0 : heeling moment arm due to the rudder action, m : metacentric eight. Being given the speed and the rolling period of a ship, the waves (length and height) and wind speed, which cause the severest conditions to her heel, are to be found from the curves given in the paper. C′ in (A) should be at least greater than unity, but, considering the other conditions which are not taken into account in the deduction of (A), the permissible lowest value of C′ must be taken much greater than unity. C′is called in this paper the safety criterion, and can be considered as like the factor of safety in the strength of materials, and its permissible lowest value should be determined from the experiences of actual ships. Values of C′ are calculated with several small-typed vessels, and given in the Table.
- 社団法人日本船舶海洋工学会の論文
著者
関連論文
- 船體撓振動の固有振動數を求める簡易計算法
- 推進器逆轉による船の惰性前進距離竝に時間の計算式に就て
- 河川用船舶とその主要寸法に就て
- 衝撃を受ける梁に就て
- 船の可浸長を求むる一方法
- Experimental Investigations on the Frictional Resistance of Planks and Ship-models
- 船内浸水經過中に起る最大横傾斜に就て
- 不連續縦桁の縦通有効率と應力集中の問題
- 船舶復原性より見たる安全示數
- 船舶復原性より見たる安全示數
- 商船型模型船の横搖試驗成績に就て
- 許容豫備復原力(曲線)に必要なる船の重要寸法の計算法
- 錨鎖の跳りに就て
- 可浸長の簡易計算法
- 妹澤博士の論文に就ての私見
- 初期歪を有する薄板の圧縮力に對する有效率に就いて
- 今井信男君論文に就て(横復原力の近似計算式に就て)
- 轉舵時及類似の場合に於ける船の横傾斜に就いて
- 波の上の横動搖の性質に就て
- 完全流體中に任意運動せる二つの圓筒間に働く力の近似計算に就て