长输管道埋地弯头结构的复杂应力分析
장수관도매지만두결구적복잡응력분석
Complex Stress Analysis on Buried Elbow of Long Distance Pipelines
  • 万方数据
    焊管 한관
    Welded Pipe and Tube
    2015年 9期 22-25 ,共4页

    夏梦莹%张宏%刘啸奔%吴经天

    하몽형%장굉%류소분%오경천

    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 銲管%埋地彎頭%管土相互作用%非線性土彈簧%應力分析%有限元方法
    한관%매지만두%관토상호작용%비선성토탄황%응력분석%유한원방법
    welded pipe%buried elbow%pipe-soil interaction%non-linear soil spring%stress analysis%finite element method
    基于非线性有限元法, 建立了埋地弯头应力计算的数值分析模型. 模型中采用非线性土弹簧模拟土壤对管道的约束作用, 采用壳单元模拟管道. 以管道内压与温度荷载为载荷条件, 分析了管道直径、 壁厚、 弯头曲率半径与夹角、 土弹簧抗力多种特性参数对管道应力的影响, 得到了管道最大应力的变化规律. 计算结果表明, 该方法能够较好地模拟弯头的受力过程, 可为埋地弯头的设计与安全评价提供一定的参考依据.
    기우비선성유한원법, 건립료매지만두응력계산적수치분석모형. 모형중채용비선성토탄황모의토양대관도적약속작용, 채용각단원모의관도. 이관도내압여온도하재위재하조건, 분석료관도직경、 벽후、 만두곡솔반경여협각、 토탄황항력다충특성삼수대관도응력적영향, 득도료관도최대응력적변화규률. 계산결과표명, 해방법능구교호지모의만두적수력과정, 가위매지만두적설계여안전평개제공일정적삼고의거.
    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.
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