焊管2015，Vol.38Issue(9)：22-25,4.
长输管道埋地弯头结构的复杂应力分析
Complex Stress Analysis on Buried Elbow of Long Distance Pipelines
摘要
Abstract
A numerical model for stress calculation of the buried elbow was built, which was established based on the nonlinear finite element method. The model adopted nonlinear soil springs to simulate the constraint effect of soil on the pipeline, using shell elements to model the pipeline. Taking the pipeline internal pressure and temperature as the load, the influence on pipeline stress of many parameters were analyzed, including pipe diameter, radius of curvature and angle, wall thickness and soil spring force, the change laws of maximal stress were obtained. The calculation results showed that the method can well simulate the stress process of the elbow, which can be used for the design and safety assessment of buried elbow.关键词
焊管/埋地弯头/管土相互作用/非线性土弹簧/应力分析/有限元方法Key words
welded pipe/buried elbow/pipe-soil interaction/non-linear soil spring/stress analysis/finite element method分类
能源科技引用本文复制引用
夏梦莹,张宏,刘啸奔,吴经天..长输管道埋地弯头结构的复杂应力分析[J].焊管,2015,38(9):22-25,4.基金项目
中国石油集团工程设计有限责任公司北京分公司科学研究项目"油气田地面工程埋地管道应力分析关键技术研究"(项目号CPEBF-2014-02). （项目号CPEBF-2014-02）
