复杂载荷作用下埋地管道的应力应变分析

摘要

为研究冻土区管道运营期间在地震作用下结构受力性状的变化,应用有限元软件ADINA建立了三维模型,并且对非均匀冻胀埋地管道进行了地震作用下的动力响应分析,得出内压、管道埋深、过渡段长度、冻胀段长度、管径、壁厚等对管道应力应变的影响.结果表明,随着冻胀段长度的增加,管道轴向应力最大值呈现出先增大后减小的趋势,且随着冻胀段的增加应力最大值趋于稳定,而内压对管道的影响主要体现在应力方面.%In order to research the pipeline changes of structural characteristics under the seismic action during operation in permafrost region,three-dimensional model was established for the dynamic response analysis by finite element software in non-uniform frost conditions.And the effects of internal pressure,buried depth of pipe,length of transition section,length of frost heaving section,diameter of pipe and thickness of wall on stress and strain of pipeline were obtained.The results are shown that with the increase of frost length,the trend of increasing at first and then decreasing of the maximum value of the axial stress of the pipeline is shown,and the maximum stress tends to be stable,and the influence of internalpressure on pipeline is mainly reflected in the stress.