船舶原理 下课件

1、0 xxxamRTF主机主机推力轴承主轴主轴轴承轴承尾轴尾轴尾轴套筒尾轴套筒船壳板船壳板螺旋桨螺旋桨MDSPP主机主机推力轴承主轴主轴轴承轴承尾轴尾轴尾轴套筒尾轴套筒船壳板船壳板螺旋桨螺旋桨PMPDsasasVVVRRTttVTVR11QapMVTQQRMMSRPHMSMEpPVRPPCdsdsFFPP SfSrdSxRdSxPPR摩擦阻力压差阻力);cos();cos(RRR0rfwefRRRRRR)(0SRXAFRRARRRdnduVSn u边界层dndudSdnduRsnf00dsxdnduRnsf);cos(0VSn u边界层00fnsfKRdsdnduKRVReV30%ReV4%Re

2、VxPIIIIII首散波首散波尾散波尾散波首横波首横波尾横波尾横波首横波首横波尾横波尾横波有利干扰有利干扰不利干扰不利干扰散波的存在及首、尾横散波的存在及首、尾横波不利干扰导致合成波波不利干扰导致合成波波高增大，消耗能量，波高增大，消耗能量，由此产生兴波阻力。由此产生兴波阻力。0.10.20.30.40.50.620406080100客船客船货船货船拖船拖船Rf/R0gLvFn/0RKRAA)(221NSvkCAyAAXX风舷角风舷角qAAyAxcRccvvvvvRcvvv)(级风级风级风级风8(%)18/36007(%)11/21006(%)6/13005(%)2/900/LLLLvvc0.

3、50.71.01.5Rtghv/深水深水深水为深水为h3/1/gVvFsnvghv ghv ghv6 . 0ghv6 . 0ghv 船速船速14kn水深水深20m静态静态正浮正浮船长船长300m尾沉尾沉2.0mMsMSMSLddBBLLCMMssmsmsVtLtLvvuuC/wweeffMSMSFrRrRrRppC22)(TLLkmaFSvCF221221vdcbaffvkLRvLfR),(dcbaLTMLMTLkLTML)()()(32dbTdcbaLdcM2:31:1:dcdbda122dLvddddfvkLvkLR)(122122SvRfSvvLfRnf221221)()(SvRfRnf

4、221)(vLSvCRee221nSSSMMMRLvLvSvCRefef221dcbawwgvkLRgvLfR),(SvCSvgLvfRww221221)(ghvFn/nSSMMFgLvgLvSvCSvFRfRnn22102210),(mmSSmSmmmSSSLvLvLvLvMsmSmmssLLvvgLvgLv23)(msmsLLvv）几何相似，FnfCr(SvCRRRrfmmrm221022Relg075. 0fCSvCRff221rmrSLmSmmsSmsLCCCvvgLvgLvLLC，则有，若，因设几何相似比6、实船剩余阻力：、实船剩余阻力：rmLrmmmrmssrsrsRCRSvCSv

5、CR32212217、实船基本阻力：、实船基本阻力：rsnrsfssRRRRR20)2(lg075. 0桨叶桨叶桨毂桨毂整流罩整流罩桨轴桨轴rPtg2bleuxzFLDSuCDSuCLDL221221)()(21fCfCDL CD CL CD 0升力角0CL 失速角bdrrnCdDbdrrnCdLDL221221)2()2(n 2rn P螺距角 2222DdDdrdDZMdLZTrnvtgtgA2)(n 2rn P螺距角 vA进程角 迎角 22)2(AvrnurdLdDcossinsincosdDdLdDdDdLdT2222DdDdrdDZMdLZTvsT0-12864202468101214

6、推力推力T（105N）船速船速vs（kn）-8-4481216N=-20N=20N=40N=60N=80N=100N=-40N=-60N=-80wpfAXsavvn 2rn PvA进程角 迎角 dLdD螺距角 )1 (SAXSAXsAvvvvSdSsAxx)1 ()1 (SSxSxSAvvvvv05. 050. 0bCAAvvvpRRTpeeRTRTTTTsvnP滑脱速度nPvnPSsnPvnPSArSSr）（SnPvs1vBPP 221221BBrrrruPuPghP12222122212212221rBrrBrrBBruuuuuuPuuPPP）（）（221rvrvuppvrrghP221r

7、vrvuppv221rvrvupp22)2(Avrnur0.10.20.30.40.50.60.70.820406080J=VA/nP=0.9J=VA/nP=0.6h/DT/TlAlTlKDTD0;yxAGFvvvvv0;xyAGFvvvvv22; 0LALFGvvvxyvvGyxAGFtgvvvvv;220;xyAGFvxvvvvxAyxFyxGyvvAAyxAvvFFyxFvvGGyxGytgvvvtgvvvtgvvvxv,222222F0gjypayRyhzFzPzRMGPayRyFjyfFePMjyayhGPayRyFjyGPayRyFjyG0102010)2(4 . 12dzGMLv

8、gsm0.40.50.60.70.80.91.034567891011D/LvG/vSRRTTRRSvCPSvCP221221LDFPaPTRRDLTRRDLSvCCDLPSvCCDLP221221)cossin(cossin)sincos(sincosRRRRSkvSvP22021sin25. 23 .61RRSRvvvRRSRvvvVAVA+VRVA+UAAAAmVVVmtT)(AAAAVUVAVtmT)(0)()()2()()U()()(V2100202102A21A22102212A210AAAAFAAAAFAAAAAFVVAVAPPTVVVAAPPTVPVVPUVPPVAVA+VRV

9、A+UAAAAAVUVAVtmT)(0AAVU21)10(22221ATAAVRKnVUNoImage)3 . 12 . 1(取RARRKUKV)3 . 12 . 1()10(22221取RATRRRsRKVRKnVKVV)()()(22RRRsRRRsSSvSvvkPpRSRvv25. 1102221RTRRRKRKnKVVbDnkKPT32RsRVVRsRVVVsRVV0RVRRLLRSkVPlPM222coscos G la la cosLPMRLdvKKRhy221流舷角流舷角 水动力作用点水动力作用点ek RR RyRxRRRRsincosh/d123456789Kh1234 30

10、60 90 120 150 180 0.2 0.4 0.6 0.8 1.0 k 0 )(3 . 0)20(2 . 0mLXe流舷角流舷角 水动力作用点水动力作用点ek RR LDvRX23 . 0AyAxAAAAsincos风舷角风舷角q 风动力作用点风动力作用点eAA xAAyySvCA22126. 115. 1sin9090CqCCyLqXq)0023. 0209. 0(),(dshQQQfQbdrufbdruCCdQRRDL221221),()cossin(上下SDSDdQdQQ上下上下dQdQ下上下上n PvA进程角 迎角 dLdD螺距角 上下dQdQzzyyxxzzzyyyxxxJM

11、JMJMamFamFamFGyzxgGMMgGMMRRsinGBMZxRJM0gGMJx0 xJgGMxJgGM /0202tCtCsincos21ttT200sinsingGMJxT22gGMJxT2)(458. 0022sGMKGBfTwefRMMMMGMRNoImagenMRxJngGM0 xxJgGMJn0 xxJgGMJnteterTtrt200coscos222xJgGMrteterTtrt200coscosTTTrr005. 1)(122wZxwLyyLgAmzmgAwzgGMJJgGMLyTzzzgAzmTgGMJ2),cos(, 02),cos(, 00091. 045. 0根据船型取CLCTdBzzgAzCTwz2Rrb=2Rhb=2rmgm2表现重力表现重力b=2Rhb=2rbbbbu80. 02