重庆大学学报2017，Vol.40Issue(8)：45-52,8.DOI:10.11835/j.issn.1000-582X.2017.08.006
埋地管道不均匀沉降的应力及影响因素分析
Analysis on stress and influence factors of buried pipelines under uneven settlement
摘要
Abstract
It is necessary to study the stress and its influence factors of buried pipelines which are under uneven settlement in order to ensure the safe operation.Stress measurement was taken on 3 representative testing points on pipelines and the pipelines' stress in operation was obtained.The nonlinear contact model of pipe and soil was built by using ANSYS.By analyzing the model,pipelines stress was obtained and the mapping relationship of the settlement with the maximum Von-Mises stress was set up.Based on this model,the influence of diameter,wall thickness,burial depth,soil's elasticity modulus and Poisson's ratio on the stress status of pipelines were also studied.Increasing wall thickness and soil's elasticity modulus and decreasing burial depth and diameter can reduce the maximum Von-Mises stress of pipelines under uneven settlement.The research methods and achievements may offer basis and measures for further researches on mechanical characteristics of natural gas pipelines under uneven settlement.关键词
埋地管道/不均匀沉降/有限元分析/应力水平Key words
buried pipeline/uneven settlement/finite element analysis/stress status分类
能源科技引用本文复制引用
马小明,康逊..埋地管道不均匀沉降的应力及影响因素分析[J].重庆大学学报,2017,40(8):45-52,8.基金项目
中澳天然气技术伙伴关系基金资助项目.Supported by China-Australia Natural Gas Techology Partnership Fund. （）
