压力容器
壓力容器
압력용기
2014年
1期
34-39,74
,共7页
碟形封头%外压失稳%屈曲%非线性%稳定安全系数
碟形封頭%外壓失穩%屈麯%非線性%穩定安全繫數
설형봉두%외압실은%굴곡%비선성%은정안전계수
dished head%instability%buckling%nonlinear%stability safety factor
采用有限元法分析了碟形封头在外压作用下的屈曲问题。通过静力学分析观察碟形封头内部的应力分布情况以判断封头发生屈曲的位置，并使用Newton-Raphson法和弧长法对封头进行非线性屈曲分析，追踪碟形封头发生屈曲失稳前后过程，获取其典型的结构特征。最后将稳定安全系数引入到有限元分析结果的处理中，从而得到可以在工程中应用的许用外压载荷。整个分析方法和结论对碟形封头的设计和校核具有实际的工程意义。
採用有限元法分析瞭碟形封頭在外壓作用下的屈麯問題。通過靜力學分析觀察碟形封頭內部的應力分佈情況以判斷封頭髮生屈麯的位置，併使用Newton-Raphson法和弧長法對封頭進行非線性屈麯分析，追蹤碟形封頭髮生屈麯失穩前後過程，穫取其典型的結構特徵。最後將穩定安全繫數引入到有限元分析結果的處理中，從而得到可以在工程中應用的許用外壓載荷。整箇分析方法和結論對碟形封頭的設計和校覈具有實際的工程意義。
채용유한원법분석료설형봉두재외압작용하적굴곡문제。통과정역학분석관찰설형봉두내부적응력분포정황이판단봉두발생굴곡적위치，병사용Newton-Raphson법화호장법대봉두진행비선성굴곡분석，추종설형봉두발생굴곡실은전후과정，획취기전형적결구특정。최후장은정안전계수인입도유한원분석결과적처리중，종이득도가이재공정중응용적허용외압재하。정개분석방법화결론대설형봉두적설계화교핵구유실제적공정의의。
The buckling problem of dished head under external pressure was analyzed by using finite ele -ment method .It could be preliminarily inferred where the buckling appeared by observing distribution of stress in dished head .Also using Newton-Raphson and Arc-length method on the nonlinear buckling a-nalysis so as to trace the typical structural characteristics when the buckling instability happening .Final-ly ,introduces the stability safety factor which be used in the data processing of the finite element analysis result in order to obtain the permissive external pressure which can be applied in the project correctly .The analysis method and results have an important meaning for the design of dished head .
