Subject : 主题名称
电子管功放电路
Job / Bid no. ：招标编
Date ：日期14-Mar-15Rev. :0Sheet :2/3
Calculation for Lug 计算凸耳
Refernence: AISC
1. Lifting condition: 起吊条件
In lifting condition, following load are condidered: 在吊装情况下，下面的负载是被考虑的 Total weight of skid: 橇块的总重量7.10 KN
Max. tilt degree in lifting: 最大倾斜的升降度 5.00 degree 度
Dynamic load factor (n) 动态负载系数(n)
2.00
软硬件协同设计
Perpendicular load of lugs: 凸耳的垂直载荷0.05
2. Lifting lug calculation(refer to DWG-MA-002.000) 吊
Dry weight of skid, 干重的橇W=7.10 KN
Lifting lug radius, 吊耳半径R=50.00 mm Diameter of lug hole, 耳孔直径d =54.00 mm
Diameter of pin, 销直径,
dp=100.00 mm
Thickness of lug, 吊耳板厚t=20.00 mm
拉线塔
Height of lug, 凸耳高度h=70.00 mm
Material of lug 材质Q235-B
Area available: 可用范围果蔬包装机
Shear 吊耳横截面面积As = 2*[(R-d/2)*t] = 920.00 mm² Tension 净拉伸面积At = 2*[(R-d/2)*t] = 920.00 mm²
Bearing 销表面积
Ab = 0.9dp*t =1800.00 mm²
Yidld Strength: 屈服强度应力Fy =235.00 Mpa Allowable on Lug: 允许对吊耳
Tension: 张或拉应力ft = 0.45Fy=105.75 Mpa
爬梯电动轮椅Bending: 许用应力fc = 0.66Fy=155.10 Mpa
Shear in Lug: 切变凸耳fs = 0.4Fy=94.00 Mpa
Bearing: 承载应力fb = 0.9Fy=211.50 Mpa
Allow stress of weld，允许应力
Safe load of lug: 吊耳的安全负
Shear 剪切应力Fs' = As*fs=86480.00 N
Tension 张或拉应力Ft' = At*ft=97290.00 N
自动化测试脚本
Bearing 承载应力
Fb' = Ab*fb=380700.00 N
Impact factor per speces 影响
因子/规范4
The largest load on one最大
的负荷F' = Wn/4/sin(60) =4099.31 N
lug is:
here:
Considering 5 degree tilt in考
虑5度倾斜 F = F'*1.05=4304.27 N
Subject :
Job / Bid no. :
Date :14-Mar-15Rev. :0Sheet :3/3 lifting, the design load is, 起
重，设计负载为,
(F.O.S.)s=Fs'/F =20.09 > 4ok
(F.O.S.)t=Ft'/F =22.60 > 4ok
(F.O.S.)b=Fb'/F =88.45 > 4ok
Fillet weld allowable stress 角
焊缝许用应力fw = 0.49f =46.06
Select fillet weld size，选择角焊缝W =10.00 mm
Min. length of fillet weld, 最小角L = F/(fw*0.707*w) =13.22 mm
Actual length of fillet weld, 实际La = (70*2+100)240mm
Therefore the weld is satisfied. 因此，焊接满足要求。
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