船舶阻力与推进课程设计

1.设计计算书1）原始给定船舶数据总长船型：远洋散装货船为球首，球尾、单桨、半悬舵总长Loa=60.03m设计水线长垂线间长型宽型深设计吃水方形系数排水量Lwl=56.0m设计水线长垂线间长型宽型深设计吃水方形系数排水量Lwl=56.0mLpp=54.50mB=9.2omD=4.60md=3.75mCB=0.735A=1416t桨轴中心距基线 Zp=1.275艾尔法计算表速度v910111213傅汝德数Fr0.2090.2320.2550.2790.302标准Co杳图7-3418380354305260标准Cbc,0.7280.690.6480.610.574实际Cb0.966.5213.4320.4928.05（肥或瘦）%（肥）（肥）（肥）（肥）（肥）Cb修正（％）-2.12-14.38-29.61-45.18-61.85Cb修正数量，-8.85-54.63-104.83-137.8-160.81已修正Cb之Ci40932524916799B/T修正（％）-3.31-3.31-3.31-3.31-3.31B/T修正数量，42-14-11-8-6-3已修正数量B/T之C239531424116196标准Xc,%L,船中刖或后1.280.55-0.8-1.58-2.1实际Xc,%L,船中刖或后0.1280.1280.1280.1280.128

相差％L，在标准者刖或后-1.15-0.420.931.72.23航速X修正（%）V/kn9.0-210.(-0-65—111.04.5312.011.05—13.017.1有效功率Pe（hP）满载19533159712352810n vv | 丄j'丄丄p丿7小,1夂TC冊耳Cd-indCdC-8 已修正Xc之C338731323114581长度修正（%）0.250.250.250.250.25长度修正数量，A40.9680.7830.5780.3630.203已修正长度C4387.968313.783231.578145.36381.203Vs37291000133117282197Pe(kw)1442434399082066Pe(hp)195331597123528102.主机与螺旋桨参数2）由模型试验提供的船体有效功率曲线数据2.主机与螺旋桨参数主机型号6300ZC额定功率441.6kw额定转速400rpm螺旋桨型号AU型叶数3叶桨数单桨旋向右旋3.推进因子的决定据型船资料选取伴流分数：对于单螺旋桨船w二0.5C-0.05二0.5X0.735二0.32B按经验公式决定推力减额分数：对于单螺旋桨标准型商船（CB二0.54-0.84）t二0.C-0.壬2X0.5-.727 0.1P取相对旋转效率 nR=i.o船身效率 nH=—=1.121-w4.可以达到最大航速的计算采用AU3叶桨图谱进行计算。取功率储备10%，轴系效率 nS=0.98螺旋桨敞水收到马力：PD=441.6kwO.9X_nsnR=441.6X0.9X0.98X1=389.49kw=529.70(hp)项目单位数值假定航速Vkn910111213匕二(1-w)Vkn6.126.87.488.168.84B=NP0.5/V2.5p DA98.81375.95459.86948.16039.4329.948.7857.7386.9406.279AU3-356112.3101.591.384.177.5P/D0.5660.5810.5960.6090.622n00.4550.5020.5440.5720.602p=pnnTE DH0hp269.935297.819322.736339.347357.145AU3-506110.299.288.881.274.8P/D0.5900.6230.6480.6680.696n00.4480.4820.5170.5470.578p=pnnTE DH0hp265.782285.953306.718324.515342.907根据AU3-35、AU3-50的、B-5图谱列表计算。

AUV/hpmaxV/hpAP/D6Dn3-359.746.620.61104.31.7280.4903-509.666.550.58103.01.6870.470n(51101009080702001011n(51101009080702001011126_13v/kn5.空泡校核按柏利尔空泡限界线中商船上限线，计算不发生空泡之最小展开面积比。桨轴沉深 h=T-Z=3.75—1.275二2.475msPp-p二PY+h-p=4033力10-252.4751740vasv=12693kgf/m2计算温度t=15°Cp=174kgf/m2PD=529・7hpp=104.63kgfs2/m4vD序号项目单位数值AU3-35AU3-501Vmaxkn9.749.66

2V=0.5144V(1-w)A maxm/s3.4073.3794(0.7兀ND/60)2(m/s)?641.15611.075V2 =V2+(0・7兀ND/60)20.7R A652.76622.496◎ =(p-p)/]PV20.7R 0 v 2 0.7R0.3710.3907Tc0.1540.1618T=P-n・75/VD 0 Akgf571455269A=T/丄pV2-tp 2 0.7Rcm21.0871.05410A=A/(1.067-0.229P/D)E pm21.1721.12811兀A/A=A/(—D2)E 0 E 40.5000.505求得不发生空泡的最小盘面比以及所对应的最佳螺旋桨要素。A/A二0.503 P/D=0.594 D=1.706m耳=0.479V二9.69k5nE0 0 max6.强度校核按2009年《规范》校核t 及t ，应不小于按下式计算之值：0.25R0.6R1.3A6NY= 1_eZbn1.3A6NY= 1_eZbneX=T d—1010Zb计算功率N=441.6x1.36x0.98=588.565hpeA=A/A=0.503dE0P/D=0.594；s=10°;G=7.6g/cm3；N=n=400rpmeb =0.226DA/(0.1Z)=0.226x1.706x0.503/0.3=0.6464mTOC\o"1-5"\h\z0.66R db =0.7212b =0.4662m0.25R 0.66Rb =0.9911b =0.6406m0.6R 0.66R项目单位数值0.25R0.6R

弦长bm0.46620.6406K1、634207K21查表7-2250151K3r1410635K4」434A=D/P(K-KD/P+KD/P-K1 1 2 0.7) 3 0.7 42728.53955.55Y二1.36AN/(Zbn)1e e2870.58731.61K5、8223K6i查表7-23412K7r4165K8丿380330A二(D/P)(K+K£)+K£+K2 5 6 7 815001221材料系数K1.1791.179X=AGAN2D3/1010Zb2 d0.3260.2370tmm58.01127.869AU标准桨叶厚度t，mm65.25537.191校核结果满足要求满足要求实取桨叶厚度mm67.437.4

0.S0.35109Q.S0-5O.fl0-SO-fl070.S0.35109Q.S0-5O.fl0-SO-fl07Q応I0.51GE16L/Ae/Ac要/求的Z--/./P/D :-//0.425空炮校核计算结果0,5实际桨叶厚度按t=37.4mm与t=674mm连直线决定:0.6R 0.25Rt=71.7mm;t=63.2mm0.20.3t=54.6mm;t=46.0mm0.40.5t=37.4mm;t=28.9mm0.60.7t=20.3mm;t=11.7mm0.80.9t=3.12mm1.07.螺距修正根据尾轴直径大小。决定毂径比/D=0.18，此值与AU桨标准毂径比h相同，故对此项螺距无需修正。由于实际桨叶厚度大于AU桨标准厚度，故需因厚度差异进行螺距修正。设计桨(-)b设计桨(-)b0.7R0.02890.9964x0.6464=0.04487标准桨（标准桨（L）b0.7R=0.045330.02920.9964x0.37893x1.706取AU3-35为基准桨NP(1-NP(1-w)Vx30.866NP0.68x9.63x30.866400x0.594x1.706x0.75x0.75x0.7标0.7标(0・04487-0・04533x豊)x0.75=0.000142A(P)=-2([)(l-s)A(；)DtD0 b0.7R=-2x0.594x0.5018x0.000142二-0.0000847=(D)0+A(D)t=0-594-0-000845=0-59398.重量及惯性矩计算根据AU桨切面的面积数据用积分方法计算得：材料重量密度y=8700kgf/m3桨叶重量：G二0.169Zbb1 max(0t.务t0.2二0.16刈8700x30.x464x(0.5+0.071乂W74)x(1二292.1kgf桨毂重量：(取螺旋桨为整体式螺旋桨，则L=2.5d或L=d+100mm)K tK锥度K=l/15,L=d+0.1=0.18x1.706+0.1=0.4071mKKLd二0.045+0.108(P/N)1/3-一k0 D 21二0.045+0.108x(588.565/400)1/3-厉x0.4072/2=0.154mdG二(0.88-0.6o)L丫d2n dk二(0.88-0.6x0.154)x0.4071x8700x0.307120.3071二193.441kgf螺旋桨总重：G=G+G=292.166+193.441=485.607kgfb1 n螺旋桨惯性矩：I二0.0948丫Zb(0.5t+1)D3mpmax0.20.6二0.0948x8700x3x0.6464x(0.5x0.0717+0.0374)x1.7063二581.694kgf-m-s29.敞水特征曲线之确定由AU3-35和AU3-50,P/D=0.594（第一次插值）的敞水曲线经过第二次插值得到AU3-47，P/D=0.594的敞水曲线。第一次插值：3-J00.10.20.30.40.50.60.735P/D=0.5Kt0.1850.16050.1380.1090.080.0480.008010Kq0.1460.1340.1190.10.080.0590.0260n000.20.350.50.610.590.150P/D=0.6Kt0.2280.2020.1770.1460.120.0880.0450lOKq0.20.1840.1680.1480.1240.10.070.032n000.180.340.490.620.670.630.250P/D=0.5Kt0.1880.1620.1320.10.0660.02800lOKq0.1480.1340.1080.10.0780.050.0080n000.20.370.480.540.4300P/D=0.6Kt0.2380.2060.1760.1420.1080.0720.0340lOKq0.2040.1880.1680.1480.120.0920.0560.02

no00.190.350.480.5750.6250.520第二次插值：3-j00.10.20.30.40.50.60.735,P/D=0.594Kt0.2250.2000.1750.1440.1180.0860.0430.00010Kq0.1970.1810.1650.1450.1210.0980.0670.030no0.0000.1810.3410.4910.6190.6650.6010.18850,P/D=0.594Kt0.2350.2030.1730.1390.1050.0690.0320.000lOKq0.2010.1850.1640.1450.1170.0890.0530.019no0.0000.1910.3510.4800.5730.6130.4890.000Ad=0.477Kt0.2340.2030.1740.1400.1070.0720.0340.000lOKq0.2000.1840.1650.1450.1180.0910.0550.021no0.0000.1870.3470.4840.5920.6350.5350.0781^3-K1^3-KT设计桨的敞水性征曲线10.系柱特性计算

由敞水特性得J=0时。K=0.234,K=0.02TQ计算功率：P=441.6x0.97xl.36=588.565hpD主机转矩：Px60x75588.656x60x75Q--D — -1054.52kgf-m2兀N 2兀x400系柱推力：T-U-°234x1054・52-7232.054kgfKD0.0201.706Q螺旋桨转速：N—60 — —354.3r/minpD4K11.特性计算取转速为400r/min,375r/min,350r/min进行计算，结果如下表所示。项目单位数值Vkn910111213V-0.5144(1-w)VAm/s3.0093.3443.6784.0124.347N=400J-V/nDA0.2650.2940.3230.3530.382K—0.1520.1420.1320.1230.113KQ0.01520.01460.01390.01310.0123P—Kpn2D4・(1-1)V/145.6TE Thp281.252291.943298.522303.456302.017P—K2兀npn2D5/75耳耳S Q SRhp581.79558.825532.032501.411470.791N=375J-V/nDA0.2820.3140.3450.3760.408KT0.1460.1350.125