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加筋平盖计算 |
项目号 ITEM NO. |
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Calculation Sheet of flat cover with support ribs
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文件号 DOC. NO. |
1 |
黄色的背景是需要输入的项，蓝色字体为结果。如果出现红色文字，则说明计算不通过。 |
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2 |
非圆形平盖的形状系数Zp= |
3.4 |
，应小于2.5， |
或者此类型不能加筋。 |
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本计算书是参照NB/T 47003.1-2009编制的。 |
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3 |
非圆形平盖的长轴b请输入Dc的值 |
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This calculation is accordance with NB/T 47003.1-2009 |
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4 |
如果没有筋板，则不需要输入筋板的数据，并将第36行以后全部删除即可。 |
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筋可以是扁钢也可以是型钢，如果筋板是扁钢则在M31M42内输入扁钢的尺寸，然后复制-选择性粘贴到对应位置即可。 |
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Please see NB/T 470003.1 Table 6-4 |
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注意标准默认筋板的许用应力和平盖的许用应力是一样的。 |
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输入数据 Input Data |
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其余参考规范NB/T 47003.1-2009 |
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平盖类型 Type of flat cover |
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13 |
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计算压力 Calculation pressure |
Pc= |
0.1 |
MPa |
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设计温度 design temperature |
T= |
60 |
oC |
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平盖材料 Material of flat cover |
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Q345R |
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设计温度下平盖材料的许用应力Allowable Stress Of Flat Cover Material At Design Temperature |
[σ]ft= |
170 |
MPa |
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平盖的焊接接头系数Joint Efficiency of flat cover |
Φf= |
1 |
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平盖名义厚度 Nominal Thickness Of Flat Cover |
δf= |
9 |
mm |
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平盖计算直径(或长轴b) Calculation Diameter Of Flat Cover(or longer axis of rectangle) |
Dc= |
1000 |
mm |
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方形平盖短轴长度 Shorter axis of rectangle |
a= |
0 |
mm |
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与平盖相焊的筒体材料 Material of shell welded to flat cover |
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Q345R |
mm |
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设计温度下筒体材料的许用应力 Allowable Stress Of shell Material At Design Temperature |
[σ]st= |
170 |
MPa |
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筒体的焊接接头系数 Joint Efficiency of shell |
Φs= |
1 |
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筒体名义厚度 Nominal thickness of shell |
δs= |
10 |
mm |
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筒体内径 Inside diameter of shell |
D1= |
400 |
mm |
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平盖厚度负偏差 Minus Deviation Of Flat Plate Thickness |
Cf1= |
0.3 |
mm |
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筒体厚度负偏差 Minus Deviation Of Shell Thickness |
Cs1= |
0.3 |
mm |
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腐蚀裕量 Corrosion Allowance |
C2= |
1 |
mm |
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壳体的计算厚度 The calculated thickness of shell |
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0.118 |
mm |
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壳体有效厚度The effeictive thickness of shell |
δe=δs-Cs1-C2 |
8.700 |
mm |
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平盖有效厚度 The effeictive thickness of flat cover |
δfe=δf-Cf1-C2 |
7.700 |
mm |
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结构特征系数,查NB/T 47003-2009 表6-4 Construction Factor |
Kp |
0.018 |
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非圆形的形状系数 Construction factor of non-circle |
Zp=3.4-2.4a/b |
3.400 |
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平盖厚度Thickness of flat cover |
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4.554 |
mm |
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δf |
≥ |
δp |
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平盖厚度合格 It is safe
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加强件数据 Data of Ribs |
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加强件面积 Area of support ribs |
A1= |
1000 |
mm2 |
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加强件是扁钢时请输入: |
扁钢宽度 |
100 |
A1= |
1000 |
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加强件惯性矩 Inertia of support rib |
I1= |
833333.333 |
mm4 |
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扁钢厚度 |
10 |
I1= |
833333.33 |
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加强件中心轴到平盖表面距离 Distance between neutral axis of rib and surface of flat cover |
L1= |
50 |
mm |
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将A1I1L1L2复制到左侧 |
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L1= |
50 |
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加强件外表面到平盖表面距离 Distance between out-surface of rib and surface of flat cover |
L2= |
100 |
mm |
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选择性粘贴 |
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L2= |
100 |
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筋板校核 Checking ribs |
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平盖起加强作用的长度 Effective length for support |
L=min(20δfe,Dc/4) |
154.000 |
mm |
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组合截面中心轴到平盖中心距离 Distance between neutral axis of component and center line of flat cover |
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24.64 |
mm |
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形心到表面的最大距离 Max length from neutral axis to top or bottom face |
y1=max(l2+δfe/2-y,y+δfe/2) |
79.21 |
mm |
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组合截面惯性矩 Inertia of component |
Ia=Lδfe3/12+I1+(L1+0.5δfe-y)2A1+y2Lδfe |
2.412E+06 |
mm4 |
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组合截面实际抗弯模量 Actral flexuralsectional modulus of component |
Z=Ia/y1 |
3.045E+04 |
mm3 |
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加强件与平盖组合所需截面系数 Required flexuralsectional modulus of component |
Zx |
10588.24 |
mm3 |
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Z |
≥ |
Zx |
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加强件校核合格 It is safe
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