王迎光新课件第二章

1、 21 Introduction Chapter Two: FlotationW 33,/Wship weighttonnesship displacementtonnesship displacement volumemwater specific gravitymtonnes BwWGIn the above formula: 重力与浮力的大小相等而方向相反 Chapter two: Flotation,GBGBWxxyy Upright Flotation 正浮状态ddxG= xByxzB zG WGBozzBGWo,0,()GBBGGBWxxyyzztg Heeling conditi

2、on 横倾状态 Chapter two: FlotationzG zB ydoWGBzxxG= xByGyBzoBGW,0,()GBBGGBWyyxxzztg Trim condition 纵倾状态 Chapter two: FlotationxddFZB ZG dAdyZB ZG WGBozXBXGoWGBz,(),()BGGBBGGBWxxzztgyyzztg Arbitrary condition 任意状态 Chapter two: FlotationzB zG dAxBxGWoGBxdyzB zG GBoyByGdFzWz 22 Ship weights and center of g

3、ravity Chapter two: Flotation1231nniiWWWWWW111111nnniiiii iiiiGGGnnniiiiiiWxWyWzxyzWWWTotal weights 总重量Center of gravity 重心 23 Displacement and center of buoyancy Chapter two: FlotationyxFyFzdzxoydxoxdzxWdA dz /2/22LWLAydx/200/22ddLWLA dzydxdz yozFWdMxA dzxoyWdMzA dz/2/22LoyLMxydx排水量和浮心位置计算 23 Displ

4、acement and center of buoyancy Chapter two: FlotationyxFyFzdzxoydxoxdzx/2/2/2/2LoyLFLWLxydxMxAydz/200/22ddLyozFWLMxA dzxydxdz /20/2/20/2dLyozLBdLLxydxdzMxydxdz /200/22ddLxoyWLMzA dzzydxdz /20/2/20/2dLxoyLBdLLyzdxdzMzydxdz 排水量和浮心位置计算 23 Displacement and center of buoyancy Chapter two: Flotation8y7y6y

5、5y3y1y2y4y04213657y1 7y1 6y1 5y1 4y1 3y1 2y1 1y1 0y9y8y1 8y1 91 61 21F91 11 41 31 5y2 02 01 81 71 9XyYXFd xXL / 2L / 2 用梯形法计算水线面积/2/222LWiLAydxLy/0200119202iyyyyyyy/2/2/222LoyiiLMxydxLk y/101191281912002000121910102iik yyyyyyyyyyyy / 2/ 2/ 2/ 2LiioyLFLWiLxydxk yMxLAyydzwherewhereFinally 23 Displacem

6、ent and center of buoyancy Chapter two: FlotationWaterplane area curve and its properties水线面面积曲线和其特性0dWA dz 00dWBdWzA dzzA dzVPCWdoCDEoCDFAd面积面积Aw1oEAw0FAwCZAw2AwAwdDddzZ 23 Displacement and center of buoyancy Chapter two: Flotation Tonnes per centimeter curve 每厘米吨数曲线( /)100WwATPCt cmDisplacement vo

7、lume curve 排水体积曲线kk曲线曲线曲线oz0101211()2()()idiWWWWWWnWnA dzdAAAAAA 23 Displacement and center of buoyancy Chapter two: Flotation Longitudinal center of buoyancy curve浮心纵向坐标曲线 Vertical center of buoyancy curve浮心垂向坐标曲线zZBZB= f ( z )zZBZB= f ( z )XB= f ( z )xF=xB尾首XF= f ( z )xF,xBz 23 Displacement and ce

8、nter of buoyancy Chapter two: Flotation Sectional area curve and its properties 横剖面面积曲线及其特性zZBZB= f ( z )oL / 2xL / 2d xbAMASASxdc/2/22LSLA dx /2/2/2/2LSLBLSLxA dxxA dxPMCobcdAL曲 线 所 围 面 积矩 形 面 积 24 Bonjean curve and its application Chapter two: Flotation zZBZB= f ( z )AS= f ( z )1 0dA20W1648Mo y= f

9、 ( z )1 21 61 42 01 8dFL1/2/22LSLA dx / 2/ 2/ 2/ 2LSyozLBLSLxA dxMxA dx/ 2/ 2/ 2/ 2LoyxoyLBLSLMdxMzA dx邦戎曲线及其运用 25 Flasov curve and its application Chapter two: Flotation zZBZB= f ( z )20001,2ZZZozoyaydzbmy dzcmzydzoa , b , ca = f ( z )zc = f ( z )b = f ( z )yozyzdzFlasov curve can be utilized to calculate the displacement volume and center of buoyancy at trim and heeling conditions 符拉索夫曲线可用于计算船舶在具有纵倾和横倾状态下的排水体积和浮心位置 Load line marks Load line marks 载重线标志载重线标志 Chapter two: Flotation