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带筋焊接平盖_带筋螺栓平盖计算

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Selected 平盖.
  • 平盖
  • 平盖
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Drawing No. 1 Code
名称 Name 符号  Symbol 数值    Value 单位  Units
平盖的设计计算 Flat lid design calculation
平盖计算直径 Calculation diameter of  flat lid Dc 1662 mm
结构特征系数 Structural characteristics coefficient K 0.032
计算压力 Calculation  pressure Pc 0.02 MPa
设计温度下材料的许用应力 Allowable stress of the material under designed temperature ［σ］t 137 MPa
焊接接头系数 Coefficient of weld joint φ 0.85
加强筋长度 Length of  strengthening rib L 1586 mm
平盖计算厚度 Calculation thickness of  flat lid δp mm
1 4  mm
加强筋设计计算 Design calculation of strengthening rib 
所需截面的系数 Coefficient of the required cross-section Z
Z=0.019Dc3Pc / ［σ］t              12733.74 
加强筋与平盖组合截面的系数 Coefficient of strengthening rib and flat lid's assembled  section Zs
Zs=2×10×δp×L 123590.31 
Zs＞Z
结论：合格 So,it comforms to the requirement.
1 1
1
平盖名义厚度 Nominal thickness of  flat lid  (δn=δp+C) δn 4.00  mm
结论 SO,THICKNESS OF FLAT LID IS 6 mm .

Drawing No. 1 Code REFER TO GB/T 150.2-2011
名称 Name 符号  Symbol 数值    Value 单位  Units
平盖板设计计算 Flat cover plate design calculation
平盖名义厚度 Normal thickness of flat cover δn 18  mm
计算压力 Calculation  pressure Pc 0.05 MPa
设计温度下平盖材料的许用应力 Allowable stress of the cover material under designed temperature ［σ］t 148 MPa
焊接接头系数 Coefficient of weld joint φ 0.85
法兰外径 Flange outside diameter  Do 2350 mm
平盖螺栓孔中心圆直径 Bolt hole circle diameter of flat cover Db 2200 mm
垫片压紧力作用中心圆直径 Force action circle diameter of gasket pressure  DG 2000 mm 取自SW
螺栓中心至垫片压紧力作用中心线的径向距离 Distance from bolt center to gasket pressure action line LG 100 mm
平盖计算直径
Calculation diameter of  flat lid
Dc
2000
mm
壳体内经 Di mm
筋板数量（GB150建议≥6）
Dc=DG
加强筋数量 Nubmer of stiffness rib n 12 TRUE ≤500 4
相邻径向筋板的内切圆直径 1 d1 411 mm 500＜Di≤1200 8
中心加强圆环的外径 Outside diameter of central stiffen circle  d2 420 mm d2≈d1 1800＜Di≤2400 16
当量直径 Equivalent diameter  d 420 mm 2400＜Di≤3000 20
d=max{d1,d2}
预紧工况下螺栓设计载荷 Bolt design load under preloading condition Wa 552958 N 取自SW 3000＜Di≤3600 24
操作工况下螺栓设计载荷 Bolt design load under operation condition Wp 167133 N 取自SW 3600＜Di≤4200 28
预紧工况下结构特征系数 Structural characteristics coefficient under preloading condition Ka 0.25 Di＞4200 32
1
操作工况下结构特征系数 Structural characteristics coefficient under operation condition Kp 0.37
1
平盖结构特征系数 Structural characteristics coefficient of cover calculation  K 0.37
1 Equivalent calculation thickness of  flat lid δp 5.12  mm
材料厚度负偏差 Negative deviation of material thickness C1 0.3  mm
腐蚀裕量 Corrosion allowance  C2 3.0  mm
平盖厚度校核 Cover thickness check   TRUE
𝛿𝑝+C1+C2≤𝛿n
加强筋设计计算  Stiffening rib design calculation
加强筋长度 Length of  strengthening rib L 645 mm L=(0.45～0.475)Di-d2/2
加强筋厚度 Thickness of  strengthening rib δ1 18 mm
加强筋高度 Height of  strengthening rib h 140 mm 加强筋宽高比为5～8
设计温度下加强筋的许用应力 Allowable stress of the rib material under designed temperature ［σ］st 148 MPa
平盖有效厚度 Effective thickness of flat cover δe 14.7  mm
平盖与筋板组合后承载的有效宽度 Effective width of combination between cover and ribs b 110  mm
组合梁部分平盖的长度 Length of cover in combination part AB 965  mm
组合梁质心到中心加强圆环的距离 Distance between combination beam centroid to central stiffening ring y1 314 mm
组合梁质心到加强筋端部的距离 Distance between combination beam centroid to the other rib end y2 331 mm
组合梁截面总几何形心至平盖板面的距离 Distance between combination beam centroid to cover top surface y 39.77 mm
组合梁的抗弯截面模数 Coefficient of strengthening rib and flat lid's combination beam Wz 100142  N
1
内压等效作用在组合梁质心C点的力 Force on point C by internal pressure equivalent force F 12513 N
1
固定端由F作用产生的弯矩 Moment by F on fixed end MA1 1524883  N∙mm
1
预计工况下由螺栓垫片施加在固定端的弯矩 Moment by bolt & gasket on fixed end under preloading condition MA2a 4607987  N∙mm
1
操作工况下由螺栓垫片施加在固定端的弯矩 Moment by bolt & gasket on fixed end under operation condition MA2p 1392776  N∙mm
1
预紧工况下固定端组合弯矩 Combination moment on fixed end under preloading condition MA预 4607987  N∙mm
MA预=MA2a
操作工况下固定端组合弯矩 Combination moment on fixed end under operation condition MA操 2917659  N∙mm
MA操=MA1+MA2p
固定端承受的组合弯矩 Combination moment on fixed end  MA 4607987  N∙mm
MA=max{MA预,MA操}
组合梁的许用应力 Allowable stress of combination beam ［σ］bt 148 MPa
所需的组合梁抗弯截面模数 Required coefficient of combination beam Wzr 31135 
组合梁抗弯截面模量校核 Checking of coefficient of  combination beam TRUE
Wzr≤Wz
示意图
11
1
1
平盖的计算
螺栓链接加筋平盖的计算
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