內(nèi)河船舶總縱強(qiáng)度計(jì)算書

1、船舶總縱強(qiáng)度與扭轉(zhuǎn)強(qiáng)度計(jì)算書2005 年 12 月一. 前言本船為航行于 A 、B級(jí)航區(qū)內(nèi)河船舶，船體結(jié)構(gòu)為混合骨架型（#22-#117 甲板和船底為縱骨架式，其他為橫骨架式）。本船有一個(gè)貨艙，大開口范圍#25至#112 肋位，無艙口蓋。船舶主尺度及主要參數(shù)如下：總 長(zhǎng) Loa = 72.33 m計(jì)算船長(zhǎng) L = 68.82 m垂線間長(zhǎng) LBP = 68.82 m型 寬 B = 11.9 m型 深 D = 4.2 m設(shè)計(jì)吃水 d = 3.5 m方形系數(shù) Cb = 0.889水線面系數(shù) CW = 0.976貨艙口寬度 b = 8.775 m貨艙口長(zhǎng)度 l1 = 45.24 m艙壁間距 l1H =

2、 49.4 m裝載散貨量 W = 2088.87 t本船b/B=0.737 和l1/l1H=0.916，屬于大開口船，其總縱強(qiáng)度與扭轉(zhuǎn)強(qiáng)度按照鋼質(zhì)內(nèi)河船舶入級(jí)與建造規(guī)范（2002）和 2004 年修改通報(bào)及鋼質(zhì)內(nèi)河船舶船體結(jié)構(gòu)直接計(jì)算指南（2002）對(duì)大開口船的規(guī)定，校核A、B、C級(jí)航區(qū)的總縱強(qiáng)度與扭轉(zhuǎn)強(qiáng)度及屈曲強(qiáng)度。二. 總縱彎曲外力計(jì)算1.載荷工況及重量分布載荷工況及重量分布的數(shù)值，見表 1。表1 各載荷工況及重量分布表 工況站距滿載出港（A）滿載到港（A）滿載出港（B、C）滿載到港（B、C）空載出港空載到港0165.63342.93565.63342.93565.63342.935124

3、3.49343.49343.49343.49343.49343.4932339.63139.63139.63139.63139.63139.63134129.707129.707133.509133.50931.43631.43645163.707163.707169.335169.33518.20518.20556165.544162.844171.172168.47220.04217.34267163.175163.175168.803168.80317.67317.67378162.544162.544168.172168.17217.04217.04289163.175163.1751

4、68.803168.80317.67317.673910163.008163.008168.636168.63617.50617.5061011162.038162.038167.666167.66616.53616.5361112162.638162.638168.266168.26617.13617.1361213162.638162.638168.266168.26617.13617.1361314162.638162.638168.266168.26617.13617.1361415163.008163.008168.636168.63617.50617.5061516162.0381

5、62.038167.666167.66616.53616.5361617162.638162.638168.266168.26617.13617.1361718122.994122.994126.827126.82723.92023.920181921.51721.51721.51721.51721.51721.517192022.02522.02522.02522.02522.02522.025合計(jì)2563.791 2538.3932644.5902619.192474.920449.5222 各種裝載靜水剪力NS和彎矩MS 各種裝載靜水剪力NS和彎矩MS，見表2。表2 各種裝載靜水剪力NS

6、和彎矩MS站號(hào)A級(jí)滿載出港A級(jí)滿載到港剪力Ns（KN）彎矩Ms(KN*m)剪力Ns（KN）彎矩Ms(KN*m)00.00000.0000.000171.222276.080-104.478-343.0712-379.964-95.838-496.025-1532.4323-1087.177-2443.374-1140.244-4488.6114-1144.848-6095.390-1150.247-8560.8865-974.953-9555.977-947.202-12304.2486-800.240-12428.803-758.161-15379.2267-650.025-14747.43

7、4-567.748-17807.3668-505.336-16563.074-378.748-19588.7369-353.806-17873.482-193.207-20731.64410-202.816-18667.912-21.477-21265.54711-54.774-18952.313144.810-21223.28112112.384-18699.109323.267-20593.37313292.863-17852.979510.897-19339.42514496.559-16351.608708.390-17428.97115726.171-14111.198922.643

8、-14816.60316955.163-11088.6091143.307-11462.803171207.114-7245.7411384.351-7321.880181117.124-3126.6171262.327-2978.28819267.077-610.696342.123-412.535200.0000.0000.0000.000最大值-1144.8481207.114-18952.313-1150.2471384.351-21265.547站號(hào)B級(jí)滿載出港B級(jí)滿載到港剪力Ns（KN）彎矩Ms(KN*m)剪力Ns（KN）彎矩Ms(KN*m)000.0000.0000.0001-4

9、2.712-241.108-198.652-306.0532-523.830-1375.618-635.307-1695.6353-1296.383-4648.274-1341.495-5034.3494-1373.149-9369.454-1376.209-9636.6865-1137.886-13820.326-1146.341-13906.2006-890.168-17447.486-930.477-17415.5337-670.826-20278.085-713.157-20186.0848-462.826-22379.862-497.434-22218.0949-254.916-23

10、772.316-292.086-23531.98110-50.884-24462.212-105.420-24177.30111147.705-24465.44883.054-24182.83512358.295-23770.841288.755-23516.11713577.045-22344.006503.291-22132.69914805.827-20153.914727.858-20000.404151049.010-17158.894969.187-17073.536161293.866-13331.5361216.775-13312.834171562.474-8628.4751

11、484.743-8672.866181454.823-3650.9111372.085-3768.03019441.693-584.850399.574-713.962200.0000.0000.0000.000最大值-1373.1491562.474-24465.448-1376.2091484.743-24182.835站號(hào)空載出港空載到港剪力Ns（KN）彎矩Ms(KN*m)剪力Ns（KN）彎矩Ms(KN*m)00.0000.0000.0000.0001604.7201028.388387.5681070.6912824.1613462.351645.7013242.6103834.635

12、6288.403696.6185941.5994737.0108965.785601.1298564.5565531.40511125.975387.17210659.7396373.98312666.990189.00412052.0287218.82213674.86219.28712816.875861.72614150.147-142.80513015.8059-86.10114105.354-275.00712712.80410-221.68813577.166-376.37112011.44211-340.19112615.597-468.02010980.88312-429.47

13、911299.608-535.9849678.08913-495.2799719.084-587.7788171.03314-528.9777968.833-621.5316518.06315-531.7846156.291-626.6524798.77716-516.5794364.861-599.1793117.59717-471.0472676.984-523.4541612.40618-345.4761280.893-366.476504.07719-200.779345.713-204.603-60.467200.1710.0000.0000.000最大值834.635-531.78

14、414150.147696.618-626.65213015.8053. 靜水剪力Nst和彎矩Mst包絡(luò)線及最大值 靜水彎矩與剪力包絡(luò)線數(shù)值，見表3。 站號(hào)剪力Ns（KN）彎矩Ms(KN*m)0001604.721070.6912824.1613462.3513-1341.56288.4034-1376.21-9636.695-930.477-13906.26-713.157-17447.57-505.336-20278.18-353.806-22379.99-376.371-23772.310-468.02-24462.211-535.985-24465.412-542.359-23770.

15、813-587.778-2234414805.827-20153.9151049.01-17158.9161293.866-13331.5171562.474-8672.87181454.823-3768.0319441.693-713.9622000最大值1562.474-24465.44. 波浪垂直彎矩 MW = aKL2B(Cb+1.2)×10-3 = 22853.033 kN.m 其中：K = -2.12L+340 a = 1.0(A級(jí)航區(qū): a=1.0; B級(jí)航區(qū):a=0.87; C級(jí)航區(qū):a=0.83) MW值在船中0.25L 范圍內(nèi)保持不變，船長(zhǎng)兩端趨于零。 三船體扭轉(zhuǎn)

16、外力計(jì)算 1) 水動(dòng)力扭矩 MT = 9.81akCTSCbLB3(1+1.24ZS/D) = 9786.0269 kN.m 其中： k = 0.162+0.556/B CTS = (0.04B/d+2.84)×10-2 a = 1.0(A級(jí)航區(qū): a=1.0; B級(jí)航區(qū):a=0.80; C級(jí)航區(qū):a=0.60)ZS = 1.88890.04m (Zs為船中大開口剖面的扭轉(zhuǎn)中心至船底基線的距離) MT值在兩端為零，在船中最大，MT沿船長(zhǎng)按余弦曲線分布。原點(diǎn)在船中，距原點(diǎn)X處的水動(dòng)力扭矩按下式確定： MT(X)= MT COS(PI*X/L)2) 貨物扭矩（船中） 裝卸狀態(tài) M0TC

17、= 0.409 Wb = 7496.904 kN.m 航行狀態(tài) MTC = 0.245 Wb = 4490.810kN.m MTC值在船兩端等于零，沿兩端到船中的MTC值按直線分布，見表4。 表四 貨物扭矩站號(hào)裝卸狀態(tài) M0TC航行狀態(tài) MTC0001749.690449.08121499.380898.16232249.0701347.24342998.7601796.32453748.4502245.40564498.1402694.48675247.8303143.35785997.5203592.64896747.2104041.729107496.9044490.810116747.

18、2104041.729125997.5203592.648135247.8303143.357144498.1402694.486153748.4502245.405162998.7601796.324172249.0701347.243184192.5292898.16219749.690449.0812000最大值7496.9044490.810四. 船體彎、扭總強(qiáng)度校核 1. 船體薄壁梁離散及剖面特性計(jì)算 將船體沿船長(zhǎng)方向劃分為21個(gè)節(jié)點(diǎn)，20個(gè)薄壁梁?jiǎn)卧?，?種剖面類型。 2. 船體應(yīng)力校核 選取7個(gè)校核剖面，各計(jì)算剖面的靜水彎曲應(yīng)力、波浪合成應(yīng)力及其與翹曲應(yīng)力之合成應(yīng)力計(jì)算與衡準(zhǔn)匯總

19、于表4中。 表中: 靜水彎曲應(yīng)力： S = MS/WV×103 N/mm2 波浪垂直彎曲和靜水彎曲合成應(yīng)力：C = (MS+MW)/WV×103 N/mm2 彎扭合成應(yīng)力： 1 = C +W N/mm2 由表5可見，本船各項(xiàng)應(yīng)力均小于許用應(yīng)力值，因此總縱強(qiáng)度與扭轉(zhuǎn)強(qiáng)度滿足規(guī)范要求。 表5 應(yīng)力校核（單位：Wcm3，Icm4，MkN·m，Mpa） 校核剖面項(xiàng)目No.1(#14)No.2(#24)No.3(#65)No.4(#85)No.5(#110)No.6(#115)No.7(#121)截面剖面模數(shù)甲板處Wd6525217235225804765804767748

20、42714160689557船底處Wb566969.1572749.4887037.6887037.6732016.7842627.5448319.2艙頂處Wc614742.4679577.6554163.0554163.0731801.3678352.3642933.3最大靜水彎矩Ms3784.368274.0724390.2122614.0510523.416734.782618.95靜水彎曲應(yīng)力甲板處sd<1375.80011.43642.01838.95813.5819.4303.798船底處sb<1376.67514.44627.49625.49414.3767.9935

21、.842艙頂處sc<1376.15612.17544.01340.80814.3809.9284.073波浪垂直彎矩Mw6446.57910676.8722853.0321062.879941.137716.7815047.562合成彎矩Ms+Mw10230.9318950.9447243.2443676.9220464.5414451.567666.512合成應(yīng)力甲板處cd<15715.679126.192681.387175.243326.411220.235711.1180船底處cb<15718.045033.08753.259649.239127.956417.150617.1006艙頂處cc<15716.642627.886485.251578.816027.964621.303911.9243裝卸狀態(tài)翹曲應(yīng)力甲板處Sw0d78.755050.455028.30680.434929.016451.742380.8789船底處Sw0b68.564740.164522.53350.346223.098441.189363.8631總應(yīng)力甲板處Tnd<13784.554661.890870.324439.392742.597861.172784.6769船底處Tnb<13775.239454.6107 50.029825.8