《船舶货运原理英文版ppt.ppt

3.1 Definition The extreme heeling moment that the ship can resist under the condition of dynamical equilibrium.船舶在动平衡条件下能够承受的横倾力矩的极限值。 Minimum external moment that can cause the ship to capsize.能使船舶倾覆的最小外力矩。 船舶在动平衡条件下，稳性所允许的最大横倾力矩。 3.2 结论 Condition for a ship not to be caused to capsize under the act of dynamical forces船舶在动力作用下不致倾覆的条件：　 　　　　　　　　Mh≤Mh.min Condition for a ship not to be caused to capsize under the act of statical forces船舶在静力作用下不致倾覆的条件： 　　　　　　　　Mh≤MR.max Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3.3 Maximum angle of dynamic inclinationθd.max （极限动倾角） the angle of heel corresponding to the minimum capsizing moment最小倾覆力矩对应的横倾角。 θd.max θS Mh.min 0 A Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. A ship’s dynamical stability depends on the work WR that the righting moment devotes. 船舶动稳性的大小取决于船舶复原力矩所作功WR（动稳性力矩）的大小。 （二 ）船舶动稳性的衡量指标 Dynamical righting moment WR is equal to the area under the curve of statical righting moment as to the numerical value 动稳性力矩WR在数值上等于静稳性力矩MR曲线下的面积。 动稳性力臂ld在数值上等于静稳性力臂GZ曲 线下的面积。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1、定义 动稳性力矩曲线：WR～θ 的关系曲线图。 动稳性力臂曲线：ld ～θ 的关系曲线图。 2、绘制 动稳性力矩曲线为MR曲线的积分曲线 动稳性力臂曲线为GZ曲线的积分曲线 3) Curve of dynamical stability （动稳性曲线图） Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Curve of dynamical stability Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3) characteristics of curve of dynamical stability动稳性曲线的特征 曲线过原点through origin point of inflexion is the angle of maximum right lever 曲线反曲点对应角为极限静倾角θs.max Extreme value appears at the angle of vanishing stability.曲线极值点对应角为稳性消失角θv θv