当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2014年
2期
274-276,280
,共4页
塑性有限元法%三通%面外弯矩%失效模式
塑性有限元法%三通%麵外彎矩%失效模式
소성유한원법%삼통%면외만구%실효모식
Plastic finite element method%Three-way pipe%Out-of-plane moment%Failure mode
采用塑性有限元分析软件ANSYS，研究了操作内压和极限面外弯矩作用下埋地城市燃气管道无缺陷三通和外壁局部减薄三通的塑性失效模式。考虑几何非线性和材料非线性，分析了无缺陷三通、缺陷位于主管底部、主管腹部以及主管肩部时三通失效模式，根据三通上应力分布云图，对模型的塑性失效进行了预测，研究结果可为埋地燃气管道三通结构设计和安全评定提供理论依据和数值参考。
採用塑性有限元分析軟件ANSYS，研究瞭操作內壓和極限麵外彎矩作用下埋地城市燃氣管道無缺陷三通和外壁跼部減薄三通的塑性失效模式。攷慮幾何非線性和材料非線性，分析瞭無缺陷三通、缺陷位于主管底部、主管腹部以及主管肩部時三通失效模式，根據三通上應力分佈雲圖，對模型的塑性失效進行瞭預測，研究結果可為埋地燃氣管道三通結構設計和安全評定提供理論依據和數值參攷。
채용소성유한원분석연건ANSYS，연구료조작내압화겁한면외만구작용하매지성시연기관도무결함삼통화외벽국부감박삼통적소성실효모식。고필궤하비선성화재료비선성，분석료무결함삼통、결함위우주관저부、주관복부이급주관견부시삼통실효모식，근거삼통상응력분포운도，대모형적소성실효진행료예측，연구결과가위매지연기관도삼통결구설계화안전평정제공이론의거화수치삼고。
In this paper, ANSYS, plastic finite element analysis software was used to evaluate the plastic failure mode for the three-way pipe without defects and with local wall-thinning under internal pressure and limit out-of-plane moment. Taking geometrical nonlinearity and material nonlinearity into consideration, failure modes for the three-way pipe without defects and with defects in the bottom, abdomen or shoulder of the three-way pipe were investigated. According to the stress distribution nephogram of the three-way pipe, plastic failure of the model was forecasted. The research results can provide theoretical bases for the structural design of buried city gas pipeline and safety assessment of three-way pipe.
