板式塔设计计算说明书

一、设计任务1.结构设计任务完成各板式塔的总体结构设计，绘图工作量折合A1图共计4张左右，具体包括以下内容：⑴各塔总图1张A0或A0加长；⑵各塔塔盘装配及零部件图2张A1。2.设计计算内容完成各板式塔设计计算说明书，主要包括各塔主要受压元件的壁厚计算及相应的强度校核、稳定性校核等内容。二、设计条件1.塔体内径mm2000iD，塔高m299.59Hi；2.设计压力pc=2.36MPa，设计温度为t90C；3.设置地区：山东省东营市，基本风压值q0=480Pa，地震设防烈度8度，场地土类别III类，地面粗糙度是B类；4.塔内装有N=94层浮阀塔盘；开有人孔12个，在人孔处安装半圆形平台12个，平台宽度B=900mm，高度为1200mm；5.塔外保温层厚度为δs=100mm，保温层密度ρ2=3503m/kg；三、设备强度及稳定性校核计算1.选材说明已知东营的基本风压值q0=480Pa，地震设防烈度8度，场地土类别III类；塔壳与裙座对接；塔内装有N=94层浮阀塔盘；塔外保温层厚度为δs=100mm，保温层密度ρ2=3503m/kg；塔体开有人孔12个，在人孔处安装半圆形平台12个，平台宽度B=900mm，高度为1200mm；设计压力pc=2.36MPa，设计温度为t90C；壳体厚度附加量3mm，裙座厚度附加量2mm；焊接接头系数取为0.85；塔内径mm2000iD。通过上述工艺条件和经验，塔壳和封头材料选用Q345R。对该塔进行强度和稳定计算。2.主要受压元件壁厚计算1本部分应包括常压塔的主要筒体及椭圆封头等重要受压元件的壁厚计算，裙座厚度先按经验值取。塔壳和封头材料选用Q345R[MPa185][,325)(t.20peLRR(1636)]直径mm2000iD段圆筒及封头：圆筒：15.12mm36.285.01852200036.2][2cicpDpt封头：mm06.1536.25.085.018521200036.25.0][2cichpKDpt经圆整后，塔壳厚度取为22mm，封头厚度取为24mm，裙座壳厚度取为18mm。3.原油分馏塔质量载荷的计算质量载荷包括：塔体、裙座质量01m；塔内件如塔盘的质量02m；保温材料的质量03m；操作平台及扶梯的质量04m；操作时物料的质量05m；塔附件如人孔、接管、法兰等质量am；水压试验时充水的质量wm。塔体、裙座质量01m=7850299.59)2044.2(414.322=65020.53kg附属件质量am=0.2501m=16255.13kg则01m+am=65020.53+16255.13=81275.66kg塔内件质量02m=kg2213775940.242保温层质量03m=725.50350)044.2244.2(422=11958.17kg操作平台及扶梯的质量04m=2112150)244.2044.4(422+299.5940=10372.46kg操作时物料的质量05m=94050.00.243972=5861.90kg水压试验时充水的质量wm=69.161608)1257.12725.500.24(10002kg2塔设备在正常操作时的质量0m=01m+02m+03m+04m+05m+am=131605.19kg塔设备在水压试验时的最大质量maxm=01m+02m+03m+04m+wm+am=287351.98kg塔设备在停工检修时的质量minm=01m+022.0m+03m+04m+am=108033.69kg将塔高分成9段，每段的质量列于表1中。表1kg段号i12345678901m+am1096.497401.281973.6713706.0813706.0813706.0813706.0813706.082246.4302m0003532.547104945.542394710003m0002324.452357.452357.452357.452357.45209.8104m3221658.42400.131733.421733.421733.422400.13.65.5605m000935.421247.221309.581122.501247.220wm00032541.6331415.9331415.9331415.9331415.933403.340m1128.497617.282032.0722898.5823754.1724052.0323158.4524420.882521.8maxm1128.497617.282032.0754504.7953922.8854158.3853451.8854589.596014.4minm1128.497617.282032.0719137.1618738.9518786.0518644.7519405.662521.8【注】塔内构件浮阀塔盘的质量每m2质量为75kg计算平台质量按每m2为150kg计算笼式扶梯质量按每m为40kg计算4.分段相关参数说明将塔沿高度分成9段，在裙座开孔处及裙座和筒体连接处作为分段点，筒体以上每10m平均分段。具体参数见下图1所示。3图15.风载荷与风弯矩的计算因1529/DH而且高度H30m,因此要同时计算顺风向和横风向载荷。（1）顺风向水平风力计算塔设备第一自振周期EImHT419.71)(6479.144030iDDEHms539.2)2044.2(14.310101.9159.29919.3160516479.1446534塔设备第二自振周期EImHT42285.0)(64285.044030iDDEHms404.0)2044.2(14.310101.9159.29919.31605164285.044653塔设备第三自振周期EImHT43102.0)(64102.044030iDDEHms145.0)2044.2(14.310101.9159.29919.31605164102.044653因地面粗糙度是B类，基本风压01qq塔设备中第i计算段所受的水平风力按下式计算：eiiiiiDlqfKKP021式中各参数按线性插值由标准查得，计算结果列于表2表2段号i1234567891K0.7）20N/m(q480if1111.0741.2951.4571.5891.6971.755)m(il0.85.41.4610101010101.639iziifvKi121.0431.0431.0681.2941.5631.8662.2702.4632.4822.959iv0.720.720.720.7740.8130.8430.8610.8760.879zi0.020.020.0320.1380.3030.5060.7920.9581.0)m(4K0001.81.21.21.21.80)m(eiD3.5593.0602.5684.4443.8443.8443.8444.4442.644)N(iP997.85790.81345.422185.223320.429122.537098.244238.16342.5(2)顺风向弯矩计算0-0截面风弯矩:5)2(.....)2()2(2123456789912331221100lllllllllPlllPllPlPMw=N.mm10100.69I-I截面风弯矩：)2(.....)2(223456789923322llllllllPllPlPMW=N.mm10964.59II-II截面风弯矩：)7800176602(.....)7800176602/5(5)2780017660(5678994lllllPlPPMW=N.mm10806.49III-III截面风弯矩:)8500176002(.....)8500176602(2850017660567899554lllllPlPPMW=N.mm10700.49（3）横风向振幅计算临界风速计算：tacSTDv112.0539.2244.2s/m42.4tacSTDv222.0404.0244.2s/m77.27共振判别：设计风速0265.1qfvvtH48077.1265.1s/m87.36因为12ccvvv，故应同时考虑第一振型和第二振型的振动。横风塔顶振幅：雷诺数vDa69Re224487.3669561041071.5时，2.0LC6当111)(/HccvvHH0)87.3642.4(16.01时，56.11阻尼比取为01.0截面惯性矩)(64440iDDI41044mm1014.7)20002044(6414.3横风塔顶振幅9114211104.49IEHvDCYtcaLT910542101014.71091.101.04.4956.15929942.425.122442.0m0319.0（4）横风向弯矩计算共振时临界风速风压作用下的顺风向风力列于表3中表3段号i1234567891K0.7）20N/m(q21021cvq60.12if1111.0741.2951.4571.5891.6971.755)m(il0.85.41.4610101010101.639iziifvKi121.0261.0261.0421.1821.3491.5371.7871.9061.9181.833iv0.720.720.720.7740.8130.8430.8610.8760.879zi0.020.020.0320.1380.3030.5060.7920.9581.0)m(4K0001.81.21.21.21.80)m(eiD3.5593.0602.5684.4443.8443.8443.8444.4442.644)N(iP25.78149.5934.47532.09528.22629.53766.46898.85128.66km(kg)1128.497617.282032.0722898.5823754.1724052.0323158.4524420.882521.87顺风向弯矩：0-0截面风弯矩:)2(.....)2()2(2123456789912331221100lllllllllPlllPllPlPMcw=N.mm10281.18I-I截面风弯矩：)2(.....)2(223456789923322llllllllPllPlPMcw=N.mm10252.18II-II截面风弯矩：)7800176602(.....)7800176602(2780017660456789955lllllPlPPMcw=N.mm10002.18III-III截面风弯矩:)8500176602(.....)8500176602(2850017660567899554lllllPlPPMcw=N.mm10980.08横风向弯矩：0-0截面：19112100)2(kkkkTcahmYTM9210763.20319.0)539.214.32(N.mm10398.58I-I截面：192121)800()2(kkkkTcahmYTM9210710.20319.0)539.214.32(N.mm10294.58II-II截面:194121)7800()2(kkkkTcahmYTM