管道压力计算

1、压 力 管 道 计 算一一、管管径径计计算算SD144-85水电站压力钢管设计规范1 1、经经济济流流速速参数计算结果工程应用取值设计流量经济流速管径58854.7322 2、经经验验公公式式钢材材料力学性能参数计算结果材质16设计流量经济流速管径Q21521588-4.792Q2352353 3、彭彭德德舒舒公公式式材质16参数计算结果16Mn345设计流量设计水头管径15MnT88455.006利用材料屈服强度二二、管管壁壁厚厚度度计计算算a a、按按内内水水压压力力初初步步计计算算参 数钢管内径跨中总水头 钢材屈服强度钢材材质强度mmkpa折算系数54599000Q2350.44工程计算

2、取值0.015工程采用壁厚18b b1 1、稳稳定定要要求求管管壁壁厚厚度度40mm不满足b b2 2、稳稳定定要要求求最最小小管管壁壁厚厚度度10mm满足要求c c、不不设设加加劲劲环环，外外压压稳稳定定计计算算钢材弹模壁厚内径临界压力抗外压稳定kpammm安全系数2.06E+08185.00019.2222722c c、设设加加劲劲环环，外外压压稳稳定定计计算算参 数钢管平均半径钢材弹模壁厚加劲环间距泊松比2.5092.06E+080.01880.3计算过程是否满足2倍大气压值1+n2*l2/3.142/r2/rn2-126.752471470.00717417324满足条件三三、钢钢管管

3、受受力力分分析析参参数数输输入入区区水容重钢材容重平均直径壁厚管线与水平夹角9.8178.55.0180.01840轴轴力力计计算算每米水重每米钢重水、管法向分力镇墩间钢管总跨数钢管自重轴线分力192.61924.4151330.0606721.905伸缩节内水压力填料摩擦力 支墩钢管摩阻 填料长度总轴向力97.352419.05243665.0300.2-1903.339四四、管管壁壁应应力力分分析析1 1、跨跨中中断断面面( (计计算算点点度度管管壁壁外外缘缘应应力力最最大大）a、环向应力161533.225b、轴应力x1-6707.539xx1-1245.550-7953.09两端固结M

4、443.389c、强度校核65870.848允许应力111375满足条件2 2、支支承承环环旁旁膜膜应应力力区区边边缘缘断断面面(=180(=180度度，剪剪应应力力xx=0)=0)a、环向应力164161.385b、轴应力x1-6707.539xx2-2490.801-9198.34两端固结M-886.671c、强度校核69220.452允许应力111375满足条件3 3、加加劲劲环环及及其其旁旁管管壁壁a、加劲环截面尺寸肋高肋宽上翼板宽上翼板厚管壁等效翼缘0.30.0360.30.0180.165加劲环截面积 有效截面积截面惯性矩B10.01680.0228054.82E-040.7245

5、779430.907单支面积0.022805双支面积0.028204668 截面惯性矩计算见截面几何性质计算软件b、应力验算M1N12x14.29283814451.8888030.7107102.908686 -6707.539钢管内壁应力66914.585 钢管外壁应力 92335.95833 最大应力值允许应力111375是否满足条件满足条件4 4、支支承承环环及及其其旁旁管管壁壁a、支承环截面尺寸肋高肋宽支承板宽支承板厚管壁等效翼缘0.40.0360.4000.0180.16576055支承环截面积 有效截面积截面惯性矩B10.0222480.03541541.00E-030.6190

6、530780.889单支面积0.028215双支面积0.03541538 截面惯性矩计算见截面几何性质计算软件b、环向应力水压力223440.893kPa支承环TR的3计算断面K1K2K1+B1*K2TR0-0.2387320.3180.044327599 58.958375667-0.2645960.124-0.15399601 -204.8239690-0.250.000-0.25-332.51505900.250.0000.25332.5150531130.2645964-0.1240.153996008 204.8239631800.2387324-0.318-0.0443276 -5

7、8.958376支承环M的4ZR10.2ZR20.182ZR3计算断面K3K4MR4（kPa)管内壁00.1112066 -0.068309886389.5485394 77843.128767-0.144060.125626419-499.2984-99774.34390-1.44E-160.2535.9116257 7176.18735901.443E-16-0.25-35.9116257 -7176.18731130.1440604 -0.125626419499.2983999 99774.343180-0.111207 0.068309886 -389.548539 -77843.1

8、29轴向应力xx1-6707.538564x369175.676内壁取正值 管外壁取负值-m/3.14*r2* 2490.8903x2计算表计算断面x2(kPa)02490.8903267973.26839900.00000+900.00000-113-973.26839180-2490.89032c、强度校核c1、轴力产生应力相当应力计算表计算断面x（kPa)(2)+(3)(1)+(2)管内外壁环外壁025105.66-4216.64827457.9025105.666717657.418-5734.27021116.7917657.429014051.891-6707.53918349.4

9、014051.899032829.894-6707.53936646.9832829.8911329224.368-7680.80733727.2229224.3718021776.125-9198.42927552.0821776.13允许应力135675钢管内外壁是否满足要求满足条件钢管外环是否满足要求满足条件最大应发生部位90c2、轴力弯矩产生应力相当应力计算表计算断面x管内壁管外壁环外壁管内壁0102948.7995942.907-66749.2316 64959.0367-82116.93 -73137.234135391.1424 63441.419021228.07920582.

10、2225583.990178 62468.149025653.70726299.56441297.79514 6246871 120019.020-88509.3571 61494.87180-56067-49061.122113631.0169 59977.25允许应力172125最大应力171859.6046应力是否满足满足条件5 5、抗抗外外压压稳稳定定分分析析5.15.1管管壁壁抗抗外外压压稳稳定定分分析析临界压力265.8951是否满足满足条件5.25.2加加劲劲环环抗抗外外压压稳稳定定分分析析p12.00E+03是否满足p2255.63596满足条件5.3

11、5.3支支承承环环抗抗外外压压稳稳定定分分析析p13928.06是否满足p2396.99385满足条件单位Mpa16404010020519522521516252536325315390375225000计算结果水头焊缝壁厚乘数系数mm1.250.90.015是否满足稳定要求不满足计算结果临界波数临界压力压 力 管 道 计 算SD144-85水电站压力钢管设计规范工程应用取值5钢材材料力学性能参 数5265.895103是否重新计算否加劲环间距含附件材料重量系数伸缩节水头81.145填料摩擦系数支墩摩擦系数0.30.1套管径差取两倍的壁厚环重心至内壁环重心至钢管中心距离0.15b2.65是否

12、满足2倍大气压值满足条件0.106x2x3-2490.80179381.0412+内缘-外缘92335.95833环重心至内壁D环重心至钢管中心距离0.2b2.7000.10831664.767557-5783.474957-9389.001412+9389.001412-5783.474957-1664.767557-0.236管外壁外环壁70837.24708-91854.892-90794.65211117733.7256530.330487-8467.9011+-6530.3304878467.90107-90794.65211-117733.72-70837.2470891854.8

13、918截面惯性矩计算见截面几何性质计算软件截面惯性矩计算见截面几何性质计算软件4（kPa)叛断最大内外壁应力最大外环应力36646.9832829.990（kPa)最大应力管外壁环外壁管内壁管外壁环外壁管内壁管外壁-73392.324090170.257 147081.4 -66749.2316 126403 171860-74909.9460126402.59 74039.51 135391.1424-75883.214055016.551 87998.5 5583.990178-75883.214054386.042 91900.08 41297.79514-76856.482011175

14、6.55 171859.6 -88509.3571-78374.1040100516.28 68588.43 113631.0169171859.6046管外壁取负值x叛断发生部位管外环135391计算时自行查看最大应力发生部位171860最大应力压 力 管 道 计 算计算结果基本资料计算水头流量管径管壁厚钢材材料4588518Q235跨数加劲环间距管线水平夹角屈服强度6840225000环尺寸项目型式肋高肋宽上翼板宽上翼板厚加劲环倒T型0.30.0360.30.018支承环工字型0.40.0360.40.018支承方式侧向滚动程序未涉及应力计算断面最大应力允许应力是否满足跨中65870.85

15、111375.00满足条件支承环边缘69220.45111375.00满足条件加劲环及旁管壁92335.96111375.00满足条件支承环及旁壁171859.60172125.00满足条件抗外压稳 定项目临界应力安全系数是否满足管壁265.902满足条件加劲环255.642满足条件支承环396.992满足条件制作加工最小厚度10mm满足要求计算依据SD144-85水电站压力钢管设计规范钢材的允许应力（折减系数）应力区域膜应力区局部应力区荷载组合基本特殊基本特殊产生应力的内力轴力轴力和弯矩轴力轴力和弯矩允许应力明管0.550.70.670.850.81地下0.670.9坝内0.670.8/0.

16、9K1maxK1最小值67-0.26460-0.238731-0.238742-0.238783-0.238844-0.238935-0.239036-0.239177-0.239328-0.23959-0.239710-0.2399311-0.2401812-0.2404513-0.2407414-0.2410515-0.2413816-0.2417317-0.2421118-0.242519-0.2429120-0.2433421-0.2437822-0.2442423-0.2447224-0.2452125-0.2457126-0.2462327-0.2467628-0.247329-0

17、.2478530-0.2484231-0.2489832-0.2495633-0.2501434-0.2507335-0.2513236-0.2519237-0.2525138-0.2531139-0.2537140-0.254341-0.2548942-0.2554843-0.2560644-0.2566345-0.257246-0.2577547-0.258348-0.2588349-0.2593550-0.2598551-0.2603352-0.260853-0.2612554-0.2616855-0.2620856-0.2624657-0.2628158-0.2631459-0.2634460-0.263761-0.2639462-0.2641463-0.