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第九章 内压薄壁圆筒与封头的强度设计. 压力容器的设计 = 结构设计 + 强度设计. 三大任务. 确定设计参数. 强度条件:. 进行强度计算. 应力分析: σ θ , σ m. σ lim /n. 确定设计壁厚. 强度理论: σ r = f ( σ θ , σ m ). 压力容器设计总论. 强度计算的内容: 1 、设计压力容器 2 、校核在用容器. §9.1 强度设计的基本知识. 弹性失效的设计准则. 对于中、低压薄壁容器,容器上一处的最大应力达到材料在设计温度下的屈服点 σ s t ,该容器即告破坏。 强度安全条件 :. 问题. - PowerPoint PPT Presentation
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p---1 p 1.051.1pw
2(1.15~1.75)Pw 3 p=1.0~1.1pw
4 405060502.07MPa 1. 2.
5 p 60.1MPa Min1.25p ,0.1MPa)
-----0.2MPa; -----0.3MPa; 0.3MPa0.2MPa----0.1MPa; 0.3MPa--0.3MPa;:0.3MPa0.3MPa.7 0.2MPa,0.3MPa
pc---5%=+(5%P)= 0.5MPa10m 10,000N/m3pw=0.5MPa, p=0.5MPapc=0.5+(1010,000)/1,000,000=0.6MPa
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2a. DN=600mm, Di=600mmb. pc=2.2MPa c. 8-10 =0.8 d.9-1 []t=170MPa e. C2 =1mm
3+C2=4.9+1.0=5.9(mm),16MnRGB6654-964-9C1=0.25mm C=C1+C2=0.25+1.0=1.25(mm)Sn= +C+ +C=4.9+1.25=6.15(mm), 7mm4
pT=1.25p=1.252.2=2.75(MPa),([s]/[s]t1); e= n-C1-C2=7-0.25-1.0=5.75(mm) 0.9ssf=0.93450.8=248.4MPa) sT 0.9ssf
2 15.6MPa,350,1300mm1. 18MnMoNbRGB6654-96) s=410MPa2.115.6MPa,100% =1 2 []=[]350=190MPa3pc=p=1.115.6=17.16(MPa)4C2=1mm
3.
4. d=+C2=61.5+1.0=62.5(mm), 4-9C1=0.25(mm) C=C1+C2=0.25+1.0=1.25(mm)5. n=+C+ 61.5+1.25=62.75(mm) 65mm)
6. e= n-C=65-1.25=63.75(mm) sT=229.4(MPa) 0.9fss=0.91410=369(MPa)sT 0.9fss
3 40Mn2A219mm,6.5mmsb=785MPa,ss=510MPa,d5=18%115MPa21. pc=15MPa, DO=219mm, Sn=6.5mm, =1 C2=1mm, 6.5mm C1=0, e=6.5-1=5.5mm, []t=minsb/nb ,ss/ns=min785/3 ,510/1.6=262(MPa)
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15MPa3.13.48MPa
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Pc=2.2MPa Di=600mmC2=1mm,[s]=170MPa 16MnRGB6654-96) 1. =0.8
Sd=2.4+1.0=3.4(mm) C1=0.25mm Sn=3.4+0.25=3.65(mm) 4mmSn=3.7mm, 4mm2.=1Sd=3.9+1.0=4.9(mm) C1=0.25mm Sn=4.9+0.25=5.15(mm)6mm
3.
Sd=4.67+1.0=5.67(mm) C1=0.25mm, Sn=5.67+0.25=5.92(mm) 7mm4.4-199K=0.3 f=1 Dc=600mmp=37.4(mm) . d=37.4+1=38.4(mm)C1=0.25mm,n=38.65mm,40mm
mm) mm) kg) 4 3000.56517.8 6 1750.46621 7 1610.41022.4 40 -----0.28388.3
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