吊耳计算.doc

1) 折页销轴强度校核销轴最大受力为副斜架起吊就位瞬间,销轴直径130剪应力:=Q/A=100103/(13/2)2=753.78kg/cm2=1000kg/cm2 弯曲应力:=Mmax/W (销轴受力按均布载荷计算) Mmax=QL2/8 q=100103/8.4=1.9104kg/cm Mmax=1/81.91048.42=1.676105kgcm W=d3/32=3.14133/32=215.58cm3 =Mmax/W=1.676105/215.58=77744kg/cm21)100t固定折页验算 RHmax=100T由拉曼公式校核最薄断面 A-B=P(D2+d2)/2sd(D2-d2) =100103(442+13.22)/2413.2(442-13.22) =1188kg/cm2固定折页焊缝计算 焊缝长度Li=250+220+4=144cm 焊缝高度h=1.6cm =P/0.7hLi =100103/0.71.6144=620kg/cm2=1000kg/cm23)活动折页计算 主斜架起吊就位后，副斜架未起吊前，斜架主体部分底部已垫垫铁并穿上地脚螺栓，所以校核折页受力以R3=178.82T为准。在A-B截面上: R=220 A400 12 60 12 126660500 B 60 220 280由拉曼公式=P(D2+d2)/2sd(D2-d2)得:=178.82103(442+12.62)/28.212.6(442-12.62) =1019.98kg/cm2=1600kg/cm2活动折页焊缝计算焊缝长度L=250+230+6=160cm焊缝高度h=1.6cm=P/0.7hL =178.82103/0.71.61662=480.91kg/cm2=1000kg/cm2二、吊耳选择计算1) 20t平衡吊耳计算由拉曼公式=P(D2+d2)/sd(D2-d2)得:=20103(222+7.22)/37.2 (222-7.22)= 1148kg/cm2=1600kg/cm2焊缝长度L=430+3=123cm焊缝高度h=1.6cm=P/0.7hLi =20103/0.71.6123=145.18 kg/cm2=1000kg/cm2销轴剪应力=Q/A=20103/3.146.82/4=551 kg/cm2=1000kg/cm22) 20t起吊吊耳选择计算在A1-A1截面上:=P(D2+d2)/sd(D2-d2) =20103(282+82)/4.98(282-82) =601 kg/cm2=1600kg/cm2在B1-B1截面上:=P/(D-d)s=20103/(28-8)4.9 =204.08kg/cm2焊缝长度L=28222=72cm焊缝高度h=1.6cm=P/0.7hLi =20103/0.71.672=248 kg/cm2=1000kg/cm2销轴剪应力=Q/A=20103/3.147.62/4=441 kg/cm2=1000kg/cm2销轴弯曲应力弯矩Mmax=(1/8)QL=201034.9/8=1.225104 kg/cm2截面系数 W=d3/32=3.147.63/32=43cm3=Mmax/W=1.225104/43=284.88 kg/cm2=1600kg/cm23) 50t吊耳计算 R=140 A1 240 16 25 16 94 B1 B1550500 A1 25 140 180在A1-A1截面上:=P(D2+d2)/sd(D2-d2) =50103(242+9.82)/6.29.8(242-9.82) =1152.24 kg/cm2=1600kg/cm2在B1-B1截面上:=P/(D-d)s=50103/(24-9.8)6.2 =568 kg/cm2焊缝长度L=30236=102cm焊缝高度h=1.6cm=P/0.7hLi =50103/0.71.6102=437.68 kg/cm2=1000kg/cm2销轴剪应力=Q/A=50103/3.149.42/4=720.85 kg/cm2=1000kg/cm2销轴弯曲应力弯矩Mmax=(1/8)QL=501035.7/8=3.5625104 kg/cm2截面系数 W=d3/32=3.149.43/32=81.5cm3=Mmax/W=3.5625104/81.5=437 kg/cm2=1600kg/cm24) 80t吊耳计算 R=160 A2 300 16 40 16 120 B2 B2500500 A2 170 170在A1-A1截面上:=P(D2+d2)/sd(D2-d2) =80103(342+12.22)/7.212.2(342-12.22) =1180 kg/cm2=1600kg/cm2在B1-B1截面上:=P/(D-d)s =80103/(34-12.2)7.2=510 kg/cm2=1600kg/cm2焊缝长度Li=234+34=102cm焊缝高度h=1.6cm=P/0.7hLi =80103/0.71.6102=700 kg/cm2=1000kg/cm2销轴剪应力 =Q/A=80103/3.14122/4=708 kg/cm2=1000kg/cm2销轴弯曲应力(按均布载荷计算)7.2cm q=80103/7.2=11.11103kg/cm2 15.5cmR=40103kgMmax =15.5R/2-q7.22/8 =401031.55/2-11.111037.22/8 =2.38105kgmW=d3/32=3.1411.63/32=153.16cm3= Mmax /W=2.38105/153.16=1554kg/cm2=1600kg/cm25) 100t吊耳计算由拉曼公式=P(D2+d2)/sd(D2-d2)得:=100103(382+132)/8.213(382-132) =1186.77 kg/cm2=1600kg/cm2在B1-B1截面上:=P/(D-d)s =100103/(38-13)8.2=487.8 kg/cm2=1600kg/c