船舶设计原理课程设计.docx

船舶设计原理课程设计1确定设计船主要尺度按照设计要求选取变化量，列入表1。表1：设计船主要尺度母型船设计船变化率垂线间长LPP/m27.5027.500型宽B/m5.2005.20设计吃水d/m1.3501.350中横剖面系数Cm0.7530.7530棱形系数Cp0.5980.5685%浮心纵向坐标Xb/m-0.5761-0.54735%排水量/t89.685.125%2母型船横剖面面积曲线（SAC）由邦戎曲线读出母型船设计吃水（1.35米）处的各站面积值，如表2。表2：母型船设计水线处各站横剖面积站号00.511.5234面积A/m0.03340.34530.61521.02851.56832.37542.588256788.599.5102.64282.41511.84451.14220.8140.48240.200303母型船SAC无因次化将母型船各站面积除以最大横剖面面积Ai0Am0，并将各站距船中的距离除以二分之一水线间长li1/2Lpp，得到如表3所示无因次结果： 表3：母型船SAC无因次化结果li1/2Lpp-1-0.9-0.8-0.7-0.6-0.4-0.2Ai0Am00.01260.13070.23280.38920.59340.89880.979300.20.40.60.70.80.911.00000.91380.69790.43220.30800.18250.07580.0000绘制母型船SAC曲线，如图1：4用“Lackenby”法绘制设计船SAC 规定0-5站为后体，5-10站为前体。1） 由母型船的无因次化SAC在CAD中做面域可查得表4，其中下标f表示前体，a表示后体。表4：母型船无因次化前后体棱形系数及浮心纵向坐标Cpf0Cpa0Xbf0Xba00.54720.6480.3272-0.35372） 将母型船横剖面面积曲线改造为设计船横剖面面积曲线 按经验公式估算设计船前、后体棱形系数Cpf和Cpa：Cpf=Cp+1.4+CpLCBLpp=0.5289Cpa=Cp-(1.4+CLCBLpp=0.6073故前、后体棱形系数变化量:dCpf=Cpf-Cpf0 =-0.0183dCpa=Cpa-Cpa0 =-0.0407 求辅助站位置按照“Lackenby”法，有dxfi=(1-xi)xidCpf/Cpf/(1-2Xbf)dxai=(1-xi)xidCaf/Caf/(1-2Xba)得到各辅助站距离x如表5： 表5：各辅助站距离站号00.511.5234x-1-0.9-0.8-0.7-0.6-0.4-0.2x-1.0000-0.8794-0.7633-0.6519-0.5450-0.3450-0.163356788.599.51000.20.40.60.70.80.910.00000.18400.37600.57600.67900.78400.89101.0000以新得到的x为横坐标，纵坐标保持不变，可得到设计船的横剖面面积曲线SAC无因次化，如图2： 校核设计船横剖面面积曲线的Cp和Xb在CAD作图，创建面域，查询得到面积及质心横坐标。二者与实际的误差分别为0.14%与21.1%。浮心纵向坐标实际值与设定值相差在很大，需要用迁移法修正，满足要求。用迁移法进行浮心纵向坐标的调整横坐标/Lwl-0.5000 -0.4397 -0.3817 -0.3259 -0.2725 -0.1725 -0.0817 Ai/Am0.0126 0.1307 0.2328 0.3892 0.5934 0.8988 0.9793 横坐标移动值0.0001 0.0015 0.0027 0.0045 0.0069 0.0104 0.0114 Ai对应横坐标-0.5001 -0.4412 -0.3844 -0.3304 -0.2794 -0.1829 -0.0930 0.0000 0.0920 0.1880 0.2880 0.3395 0.3920 0.4455 0.5000 1.0000 0.9138 0.6979 0.4322 0.3080 0.1825 0.0758 0.0000 0.0116 0.0106 0.0081 0.0050 0.0036 0.0021 0.0009 0.0000 -0.0116 0.0814 0.1799 0.2830 0.3359 0.3899 0.4446 0.5000 此时，浮心纵向坐标的误差调整为0.08%。5母型船型值表无因次化1） 将相应值分别除以Lw，B0，得到母型船型值表的无因次值。表6：母型船无因次化型值表各站距舯-0.5000-0.4500-0.4000-0.3500-0.3000-0.2000站号0.50001.00001.50002.00003.0000基线0.00000.1269水线0.25000.3883水线0.50000.25000.6288水线0.75000.19230.57690.7923水线1.00000.18120.65770.79310.8846水线1.15000.29220.71520.79820.85540.9201水线1.25000.69650.80760.84410.88710.9385水线1.35000.7012 0.7988 0.8410 0.8724 0.9104 0.9538 水线1.40000.7844 0.8221 0.8549 0.8842 0.9196 0.9608 水线1.50000.82500.85000.87850.90540.93630.9731水线1.75000.88130.90340.92350.94670.96790.9923水线2.00000.92740.94270.95710.97310.98751.0000水线2.25000.96770.97430.98400.99081.00001.0000水线2.50001.00001.00001.00001.00001.00001.0000-0.10000.00000.10000.20000.30000.35000.40000.45000.50004.00005.00006.00007.00008.00008.50009.00009.500010.00000.10770.03080.49620.51920.41920.25000.10770.06510.03260.72690.76920.71150.50960.27500.18460.09650.03080.85000.88080.82500.63850.39620.27650.15790.05890.92880.94670.90030.73400.48460.35380.21550.09230.95740.97100.93050.77690.53220.39570.24950.11440.97120.98140.94550.80150.56150.42250.27310.13080.9827 0.9885 0.9577 0.8235 0.5885 0.4490 0.2973 0.1491 0.0081 0.9874 0.9914 0.9630 0.8339 0.6015 0.4623 0.3089 0.1592 0.0139 0.99420.99620.97120.85200.62690.48880.33370.18080.02691.00001.00000.98780.89230.68790.55790.40000.24200.07221.00001.00001.00000.92390.74750.62800.47310.31100.12521.00001.00001.00000.95120.80560.69580.55000.38270.18631.00001.00001.00000.97310.86310.76540.63220.46150.25382） 绘制母型船无因次化半宽水线图图3：母型船无因次化半宽水线图3） 通过之前计算的各站处dx，在母型船的无因次型值表上插出设计船的无因次化半宽水线图。图4：设计船无因次化半宽水线图6设计船型值表1） 从设计船无因次化的半宽水线图中插值得出各水线的设计船无因次化型值表，并进行有因次化。表7：设计船无因次化型值表各站距舯-0.5000-0.4500-0.4000-0.3500-0.3000-0.2000站号0.50001.00001.50002.00003.0000基线0.00000.3289水线0.25000.8975水线0.50000.46701.5577水线0.75000.37291.19942.0116水线1.00000.32141.44951.96012.2690水线1.15000.60251.77032.00512.16922.3676水线1.25001.72172.05502.16112.25992.4203水线1.35001.82392.05112.16162.23632.32702.4630水线1.40002.03972.12292.20042.26882.35352.4820水线1.50002.14532.19932.26362.32702.40192.5160水线1.75002.29162.34052.38602.43832.49522.5722水线2.00002.41122.44532.47752.51422.55322.5940水线2.25002.51602.53012.55192.56882.58702.6000水线2.50002.60002.60002.60002.60002.60002.6000-0.10000.00000.10000.20000.30000.35000.40000.45000.50004.00005.00006.00007.00008.00008.50009.00009.500010.00000.28910.08001.27611.34241.00830.56580.24050.14590.06971.87281.99811.79091.18660.63930.41760.21630.06762.19882.28722.08861.53270.93260.63620.36040.13342.40712.45802.29271.78521.15470.82650.49870.21162.48252.52122.37641.90351.27480.93080.58210.26652.51912.54852.41851.97261.34940.99890.64060.30892.55032.56672.45442.03501.41911.06730.70070.35180.02112.56312.57452.47002.06491.45341.10110.73030.37700.03612.58212.58732.49392.11851.52071.16970.79380.43160.06992.59922.59952.54542.23811.68641.35040.96410.58840.18762.60002.60002.56152.32991.85091.53761.15340.76540.32562.60002.60002.58442.42482.00981.72121.35360.94930.48432.60002.60002.59512.49732.17181.91021.56961.15150.66002） 作横剖线图，如图5。图5：设计船横剖线图3） 从中插值得出设计船的型值表。以毫米为单位并进行取整。表9：设计船型值表吃水尾端点距舯尾端点半宽半宽半宽半宽半宽半宽半宽半宽站号00.511.5234船底-67253677808080808080基线0-742150329289水线250-8017508981276水线500-87725046715581873水线750-992850373119920122199水线1000-11177503211450196022692407水线1150-128665060317702005216923682482水线1250-1372769172220552161226024202519水线1350-1375018411824205121622236232724632550水线1400-1376120392040212322002269235424822563水线1500-1378421452145219922642327240225162582水线1750-1384022922292234123862438249525722599水线2000-1389724112411244524782514255325942600水线2250-1395325162516253025522569258726002600水线2500-1400926002600260026002600260026002600主甲板-1398225522552258525852595260026002600上甲板-1411626002600260026002600260026002600主甲板高23602360230022602215219021302100上甲板高29502950290028602815279027302690各站距舯-13750-12375-11000-9625-8250-5500-2750半宽半宽半宽半宽半宽半宽半宽半宽首端点半宽首端点距舯56788.599.510808080706050301030121258030013421008566241146703012250199817911187639418216683012890228720891533933636360133301322524582293178511558274992123013470252123761903127593158226750135902549241919731349999641309501368025672454203514191067701352215013750257524702065145311017303773624137862587249421181521117079443270411385025992545223816861350964588188771399426002562233018511538115376532610914158260025842425201017211354949484162143062600259524972172191015701152660233144722600260024652143191616201278816324147192600260026002499239021901920149265715345210021352210233024002480258026902795270027352830292530103130327034103600027505500825096251100012375137504） 根据设计船型值表绘制设计船的半宽水线图和纵剖线图 图6：设计船半宽水线图 图7：设计船纵剖线图7型线总图绘制1) 三面投影光顺配合。2) 制定型值表，注字，标尺寸。详见附图A3图纸。8主尺度汇总 船体总长LENGTH OVER ALL： 29.46m水线间长DESIGN WATERLINE LENGTH ： 27.5m垂线间长LENGTH BETWEEN PERPENDICULARS： 27.5m型 宽MOULDED BREADTH： 5.2m型 深MOULDED DEPTH： 2.1m设计吃水DESIGN DRAFT： 1.35m方形系数BLOCK COEFFICIENT： 0.428棱形系数LONGITUDINAL COEFFICIENT： 0.568水线面系数WATERPLANE COEFFICIENT： 0.774中横剖面系数MIDSHIP SECTION COEFFICIENT： 0.753设计排水量DESIGN DISPLACEMENT： 85.12t9 设计存在的问题及总结（1） 设计中没有改变船的主尺度，故船的侧视轮廓可以保持不变。即使主尺度发生改变，方法也相同，都是先求无因次的横剖线图，再进行有因次化。因此，这次课程设计结合了比例变换法（不改变船型系数等无因次的量）、移动横剖面变换法和迁移法（只改变浮心纵向坐标）。（2） 设计水线以下的部分由于涉及到船的阻力性能，需要根据母型船的型线由型线变换方法得到；设计水线以上的部分，对阻力影响程度很小，可以自行绘制，只要满足相关安全性规范要求即可。这里也采用母型的设计水线以上的型线，再与规范的要求进行比较。12