船体强度与结构设计方案计算书

1、记制M检核定1500m3耙吸式挖泥船1宇I日期2班3009205278总纵强度计算书2018.8.25基本设计文件编号力18页,第1页天津大学建工学院船舶工程系目录 TOC o 1-5 h z HYPERLINK l bookmark6 o Current Document .计算说明3 HYPERLINK l bookmark10 o Current Document .剪力和弯矩计算4计算重量分布和浮力分布4计算静水剪力和静水弯矩5分别绘制站间载荷、剪力和弯矩图7计算总纵弯矩值和剪力值8 HYPERLINK l bookmark20 o Current Document 3总纵弯曲应力、受

2、压构件的稳定性校核及折减计算113.1临界应力失稳计算13 HYPERLINK l bookmark33 o Current Document 4结论141计算说明本计算书是1500m3耙吸式挖泥船总强度计算书，涉及到挖泥船的静水弯矩、剪力，波浪附加弯矩、附加剪力，计算总弯曲应力等等，以校核是否满足设计要求。这里我们只计算满载到港的情况。具体计算内容如下：计算内容静水弯矩、剪力波浪附加弯矩、附加剪力剪力、弯矩合成计算总弯曲应力、受压构件的稳定性校核及折减计算折减后的高次总弯曲应力计算计算结果分析及结论计算工况：满载出港计算状态：中拱和中垂主要技术参数船长：78M;满载排水量：5020吨；平均吃

3、水：5.4M;站距：AL=3.9m波高：4M重心在肿前:Xg=0.813m。艄吃水：Tf=577ML尾吃水：Ta=5.23M主尺度：船长：78M,船宽：14.5M,型深：6.3M,设计吃水5.1M,肋距：0.6M,强框架间距：1.8M。3海水密度：10.055KN/m船体材料：计算剖面的所有构件均采用低碳钢，屈服极限bY=235.2N/mm2许用应力：.总纵弯曲许用应力：b=0.5(TY.总纵弯曲与板架局部弯曲合成应力的许用应力：在板架跨中：(T1+b2=0.65(TY在横舱壁处：(T1+(T2=(TY1.3静水弯矩计算资料(1站间重量吨)表1-1)0112233445566778899105

4、7.60562.71681.581183.623177.206202.028274.463472.659454.598456.4481011111212131314141515161617171818191920418.771408.105405.117401.806435.472166.794147.99383.40174.61954.8592(2静水平衡状态各站横剖面浸水面积m)表1-2)01234567891010234156667275777777771112131415161718192077777878797868512552剪力和弯矩计算2.1计算重量分布和浮力分布根据表1-1）

5、绘制站间重量分布曲线:站间重量9080706050403020100 I I I ” ” I1H IillllllllllllllIllllllllllllllIllllllllllllllJll I川川I川本站间重量01234567891011121314151617181920图2-1站间重量分布梯形图依据表1-2）计算静水浮力:表2-1）静水浮力计算静水浮力计算站号浸水面积m成对和理论站间浮力KN站间0101012333647.0390-1241641254.8641-23j56971901.9032-34661222392.0843-45j721382705.8014-56751472

6、882.2665-67j771522980.3026-78771543019.5177-89771543019.5178-910771543019.5179-1011771543019.51710-1112771543019.51711-12113781553039.12412-1314781563058.73113-14115791573078.33814-1516781573078.33815-1665916-1718511192333.26317-181925761490.15118-1920530588.21819-20理论站间浮力3500理论站间浮力3000

7、2500200015001000500001234567891011121314151617181920图2-2浮力分布曲线图2.2计算静水剪力和静水弯矩根据表格1-1）和表格2-1）绘制静水剪力和静水弯矩的计算表格如下：表2-2）静水计算站理论理论理论站理论站第第对第剪力*L对第弯矩理号站间站间间浮力间载荷5)列值/210)值论KIN)KIN)列自列积不封列的站吨）KN3)-上至分闭的不封号4)下和修正闭值值的修正12)3)4)5)6)7)8)9)10)11)12)0000-57.60565.1647.039-115052581.934281.9381.937.28974.64159.712

8、8.131.61424285437253921-62.71615.21254.86-226444639.620721.5885.414.57706.91726.256.31470.04542397755705272-81.58800.31901.90-331103251101.591823.3430.21.861801.6688.384.46304.364151296287458293-183.61801.2392.08-442334145590.742872413.897667.1629.15942384.7314951512.6114438.44-177.21738.2705.80-550

9、639105967.4093381.1346236.443344.26251640.725610643.49385.663.85-202.01981.2882.26-6628895575900.3714281.2112543.734237.41194768.9404250767.39193.415.56-274.42692.2980.30-77634822287.8194569.2997651.024518.58454897.0575579749.5946.268.17-472.64636.3019.511617.26-8859785658292952.3749858.312893.73121

10、1025.7209622.2889.522.38-454.54459.3019.511440.08-9998606659881512.4196265.601446.818271153.8067313.6875237.69-456.44477.3019.511458.23-19.00-110487556583853.894352872.89362848801281.83599049.685.753.210418.74108.3019.511088.621034.-1114.-1-71144657017324254780.1892829681409.81558111.884.168.411408.

11、14003.3019.51983.9932018.-2106.-1-0551065557263949487.47204770131537.75476212.382.98312405.13974.3039.12935.0742953.-3048.-1-171983750283452194.76568673171665.65651313.881.498.513401.83941.3058.73882.9853836.-3938.-1-0671718678627731102.0843540751794.52281414.258.814.714435.44271.3078.331193.645030.

12、-5139.-1-7298082520742818864109.3775367841922.3486251548.729.515166.71636.3078.33-3588.-3704.-1-942498251442.0833910245116.6976199782050238.144.716147.91451.2862.65-2177.-2301.-1-93811851410.844914479.123.94198734.2178.6556.71771737277859191783.40818.12333.26-662.3-793.6-3197-1-16427515

13、15.099241639.131.20972306.890.281889449177561874.61732.01490.15-42.76-342.81-9121758.13895.741072.138.50952092.2434.527919616284070491954.85538.1588.217-0-2-967550.0507145.71314.145.72563.2563.0.0030201973997050589由表2-2）可知:x0813满载重量：W=49246.2KN重心坐标xgM艄吃7卜Tf=5.77M尾吃水：Ta=5.23M最大剪力值Nmax=5139.775KN最大弯矩值

14、：Mk=-83599.2KN.m准确度：剪力：弯矩：满足精度要求。2.2.1分别绘制站间载荷、剪力和弯矩图如下站间载荷分布2000150010005000-500-1000-1500-2000-Onum1-01 0-9 9-841-31站间载荷分布图2-3站间载荷分布图静水载荷剪力静水载荷剪力图2-4静水载荷剪力图静水弯矩图静水弯矩图2.3计算总纵弯矩值和剪力值:根据表格波浪载荷1-2)2-3)和2-2)进行总纵弯矩值和剪力值的计算:表2-3)合成剪力及弯矩计算理波静横对对静波不封修正波浪不封修正静水静水论面水剖45)浪剪闭调后的弯矩闭修后的剪力弯矩站下下面)列的力整剪力正值号横横积歹U积分合

15、成剪力合成弯矩剖剖浸的面面水积浸浸面分水水积面面增积积值m)-(2123456)7)8)9)10111213141516)02310-0-.21313.13.2258.504.504.2281669169114223-.41945.72.2898.10.3887.27601247151374.631.6962.1544.48012036708.5.14.36443192353.9825941-.41883.201.163920.61618770824945214706.1470232566842.46262.56072.95.77.28.49975.27.93.76237256-.116118

16、403.231730.9228615423741116818016304408817987.1.2145.77108.865.6.424.1.28.29.148.4747766-.011145667.285041.2280925504988205123841443519434951.0.3905.7144.484.1.565.5.738.4.223.9157772-.05.161973.316651.531143723623531003344256164595661909.4993.3718.867.4.71.7.850.8.712.5670754.-.1861611297317061.831

17、0949597482421142374042734782534.72.14.88216.065.842.2.935.57.77627714-.0.91411600278272.12710612087295247451857557229110064.92.78.66252.544.4.984.5.467.1328567720-.3.61061849208582.42002706999776071289372094896132873.35.05.23288.86.8.129.7.96.3.71169517725-.4.560.2018117992.7108677061122658314468067

18、253214652814.54.18324.452.44.38.2.523.6.971210507726-19.0-.1.87.72083150.103.47.97965124767180362835928.9150746.389760363986.21.44.89.2362841151772545.-883.-996.-1114-2111-.1.80520463066113.6462782213716450.928155.567146019.03348.28.59.78.4681258771889.-1756-1880-2106-3986-.3.661911.81123.4537308149

19、65811.2047547.657133546.3864305.74.369013677810118-2329-2463-3048-5512-.4.5.831702.93133.876651116214889.5686565.444114537.959470.82.881.5491477780.129-2543-2687-3938-6626-.633.731454.649144.899556017463814.8435228.74290427.39257.307.41.79.1158479-124-2437-2592-5139-7732-.75.341200.965154.5194589187

20、02718.7753486.2956204272.325543.27.16.12.58.6169178-104-2053-2218-3704-5923-.813.75971.859164.717371319951717.9761792.69335107.8238584.14.29.97.77.67178568-73.-1436-1611-2301-3912-.61725793.231175.392303221209127.4196556.81115683.6231618.51.4.08.193.33187051-36.-706.-891.-793.-1685-.61902683.2531185

21、.71792615224437026097890.3284592.6964650.68.5.126.36193825-3.0-59.6-255.-42.7342.298.-.3134644.0604195.374424652369961.609585271354618.8.397687.25.75356838205.5-0-170.10.652.206.206.0.00249424940.000.000.000.00175137072072022.82.842838902817根据上表分布绘制合成剪力图和合成弯矩图如下:由表格2-3)可以得到最大弯矩值和最大剪力值：最大剪力值：Nma)=773

22、2.295KN最大弯矩值：Mmai150784KN.m3总纵弯曲应力、受压构件的稳定性校核及折减计算图3-166.5号肋位剖面图各个构件的名称、尺寸、面积及其形心到到参考轴的距离如表3-1所示。参考轴选在船底基线。表3-1参与总弯曲构件构件编R构件名称构件尺寸mm)构件剖面积2cm)距参考轴距离m)静力矩构件自身惯性矩(cm*m矩中和轴距离(m总纵弯曲应力2(N/mm1平板龙骨一18K1290232.22.0000.0063-3.2684.592箱型内龙骨|125001420044.00.3314.524.790.92-2.9376.033箱型底纵骨L100M60M1015.00.060.93

23、0.060.013-3.283.044箱型上纵梁10 x30012M13022.82.659.28154.120.017-0.6617.125箱型上下弧板-600父201023.03069.183.06-0.266.756箱型纵骨L100M60M10150.69.35.580.013-2.6669.02151.218.622.320.013-2.0653.45302.2066145,20.025-1.0627.517箱型竖板46M15002400.7518013545-2.5165.138箱型斜板46M19002582.2567.61248.7277.615-1.0627.509船底板46M1

24、6002560000.006-3.2684.5910觥板14父20002800.6168100.893.34-2.6669.0211侧板6x38006083.051854.45655.92731.63-0.215.4512顶歹U板16M15002405.6513567661.4452.39-62.0113船底纵骨L180X110X12X31010000.297-3.2684.59314觥纵骨L180X110X1233.70.413.485.390.09-2.8674.2115舷侧纵骨L100M100M12M367.71.6108.32173.310.057-1.6643.0816舷侧纵骨L14

25、0X90X10L140M90父10父322.23.066.6199.8P0.0151-0.266.7566.64.4293.041289.30.0451.14-29.5817甲板边板44x15002106.313238334.90.0033.04-78.8818甲板板11X140011x43501546.5109270980.0033.24-84.07478.56.52827.518378.0.0043.24-84.0819甲板纵行吱咨父214M2002486.0148889280.532.74-71.120甲板纵骨L160 x100 x10 x8202.46.01214.47286.40.4

26、42.74-71.121泥仓纵骨L140M90M10X4L140X90X10X388.82.0177.6355.20.06-1.2632.7066.65.033316650.041.74-45.1522泥仓竖壁_14M40005604.3240810354.746.671.04-26.9823泥仓斜壁16x21003361.5504756123.48-1.7645.6724泥仓竖壁心X550880.2723.766.41522.22-2.9977.59求和：5053.516473.3382753.473求和可知：剖面面积A=5053.5cm2静力矩：B=16473.33cm2*m惯性矩：C=8

27、0882.86+1870.612=82753.473cm2*m2?=B/A=3.26mI=2C-?2*A)=2CB2/A)=58107.876cm2*m23.1临界应力失稳计算满载中垂状态。船体梁中和轴以下处于受拉状态，中和轴以上处于受压状态。故只需要计算中和轴以上部分受压板及纵骨的临界应力。受压纵骨架式甲板的临界应力计算公式：构件名称甲板板、-cr编R18100t 2=76()2b受月板长边a三板的临界应力 板短边 b(cm 65.9(3-1表 1.12.786甲板边板17180受压纵骨剖面要素及临界应力计算表格如下：65.91.44.513板的临界应力 er cr(N/mm211.736235.2计算公式:二2Ei二E=2 TOC o 1-5 h z HYPERLINK l bookmark26 o Current Document a(f+bet)(N/mm23.14221090.441802m(25.32+300X10)而0.5八=0.5*235.2=117.6(N/mn20.5所以纵骨的临界应力按下式计算：2(N/mm