跨度28m,双梁桥式起重机结构设计资料

摘要本设计采用许用应力法以及计算机辅助设计方法对桥式起重机桥架金属结构进行设计。设计过程先用估计的桥式起重机各结构尺寸数据对起重机的强度、疲劳强度、稳定性、刚度进行粗略的校核计算，待以上因素都达到材料的许用要求后，画出桥架结构图。然后计算出主梁和端梁的自重载荷，再用此载荷进行桥架强度和刚度的精确校核计算。若未通过，再重复上述步骤，直到通过。由于桥架的初校是在草稿中列出，在设计说明书中不予记录，仅记载桥架的精校过程。设计中参考了各种资料,运用各种途径,努力利用各种条件来完成此次设计.本设计通过反复斟酌各种设计方案,认真讨论,不断反复校核,力求设计合理;通过采取计算机辅助设计方法以及参考前人的先进经验,力求有所创新;通过计算机辅助设计方法,绘图和设计计算都充分发挥计算机的强大辅助功能,力求设计高效。AbstractTheprojectdesignsmetalframeworkofbridgecraneinuseofallowablestressmethodandCAD.Atfirst,Ichosesizeassumably.Then,proofreadedthesize.Iftheproofwasnotpassed,mustchoosethesizeagainuptopasstheproof.Iftheproofwaspassed,itcouldcarryonthespecificstructuraldesign.Atlast,it’splotandcleanupthecalculationprocess.Designedtomakereferencetothevariousofdataintheprocess,makeuseofvariouspaths,workhardtomakeuseofthevariousofconditiontocompletethisdesigninreason.Iconsideredvariousdesignprojects,discussedearnestly,calculatedtimeaftertime,tryhardforareasonabledesign;viaCADandmakereferenceadvancedexperiences,tryhardforainnovatorydesign;viaCAD,plotingandcalculationcanmakegooduseofpowerfullcomputer,tryhardforahighefficiencydesign.Iknewthevariousofdesignmethods,newestmachinedesignmethodsbothhereandabroadalsofoundvariousofgooddata.KeyWords:bridgecrane;proofread;allowablestressI目录第一章桥式起重机金属结构设计参数.......................................1第二章.总体设计...........................................................22.1大车轴距............................................................22.2主梁尺寸............................................................2第三章主端梁截面积几何性质...............................................3第四章、载荷..............................................................44.1固定载荷............................................................44.2小车轮压............................................................44.3动力效应系数........................................................54.4惯性载荷...........................................................54.5偏斜运行侧向力.....................................................6第五章主梁计算...........................................................85.1内力...............................................................85.2强度..............................................................135.3主梁疲劳强度......................................................165.4主梁稳定性........................................................19第六章、端梁计算.........................................................246.1载荷与内力........................................................246.2水平载荷..........................................................256.3疲劳强度..........................................................306.4稳定性............................................................336.5端梁拼接..........................................................33第七章、主梁和端梁的连接.................................................40第八章、刚度计算.........................................................408.1桥架的垂直静刚度..................................................408.2桥架的水平惯性位移................................................408.3垂直动刚度........................................................41II8.4水平动刚度........................................................42第九章、桥架拱度..........................................................44总结.....................................................................45参考文献.................................................................46致谢................................................................47英文资料.................................................................48计算项目设计计算内容设计结果第1页共58页第一章桥式起重机金属结构设计参数表1-1设计参数起重机类型通用工作级别A6轨道放置中轨桥架形式双梁50/10t×28m起升机构主起升副起升额定起重量（吨）5010起升高度(米)1218起升速度(米/分)12.1-1.2110.3工作级别M6M5运行结构大车小车轮距（米）3.75轨距（米）2.528速度（米/分）4.02-40.28.53——85.3工作级别M6M5轮压（MPa）441179.7轨道型号QU80P43计算项目设计计算内容设计结果第2页共58页1)大车轴距2)腹板尺寸3)翼缘板尺寸4)主梁尺寸第二章总体设计1.桥架尺寸的确定0B=（11~46）L=（11~46）22.5=6.375~4.25m根据小车轨距和中轨箱型梁宽度以及大车运行机构的设置，取0B=5m端梁全长B=5.916m2.主梁尺寸高度h=（11~1417）L=1821~1500mm取腹板高度0h=1600mm腹板厚度1=6mm翼缘板厚度0=24mm主梁总高度1H=0h+20=1648mm主梁宽度b=(0.4~0.5)1H=648~810mm字腹板外侧间距b=760mm60L=425mm且13H=540mm上下翼缘板相同为24mm600mm主梁端部变截面长取d=2350mm.图2-1双梁桥架结构0B=5mB=5.916m0h=1600mm1=6mm0=24mm1H=1648mmB1=b=552mm24mm600mmd=2350mm计算项目设计计算内容设计结果第3页共58页1）截面尺寸第三章主端梁截面积几何性质图3-1主梁与端梁截面a)主梁截面A=(60024+16006)2=0.04512m2惯性矩xI=2.8164160.425436160）（=2.130531010mm4yI=2.250491616033454）（=1.71202109mm4b)端梁截面A=2876020600）（=36160mm2=0.03616m2xI=762802603.8076）（=4.2641109mm4yI=60237.6760.83632（）=6.8221108mm4A=0.04512m2xI=2.1301010mm4yI=1.712109mm4A1=0.03616m2xI1=4.264109mm4yI1=6.822108mm4计算项目设计计算内容设计结果第4页共58页1)固定载荷2)小车轮压第四章载荷主梁自重载荷'F=kρAg9.81=1.281.9104512.07850=4165.3N小车轨道重'gF=38.869.81=381.22N/m栏杆等重量lF=lmg=1009.81=981N/m主梁的均布载荷qF='F+'gF+lF=5527.52N/m起升载荷为Qp=Qmg=.89100050=49000N小车自重GXp=8.917390=170422N小车自重载荷Qxp=mg=12.129.811000=107910.2N小车重力QXP产生的静轮压X1P和X2PX1P=gbk）（e.50bPQX=1704220.30.53.71.92.53.7=50666N'F=4165.3NqF=5527.52N/m计算项目设计计算内容设计结果第5页共58页3)动力效应系数4)惯性载荷X2P=2QXLe.50bP）（k=53480.38N额定起升载荷aP产生的O1P和O2PP01=bcb2P1Q=125810.8NP02=b2P1Ql=119189.1N1Pj=O1P+X1P=175476.8N2jP=P02+X2P=172669.8N小车轮压P=1jP+2j