Abstract: In order to analyze the stress and strain of single directly crossing pipeline with anchor block influenced by gravity and the inner pressure, the finite element analysis software ANSYS was used to make numerical simulation. Through changing the length and the pipe diameter of crossing pipeline, the stress concentration point and the pipeline failure point were found. Conclusions were made as follows: with the increase of the pipeline length, the stress and strain increased by the influence of gravity and the inner pressure. When the length exceeded 25 m, the crossing pipeline structure failed in strength. When the diameter reached 610 mm, it also failed. To avoid the failure of the pipeline, the comprehensive influenced factors should be thought about, and truss crossing pipeline and suspending pipeline should be used.

Key words: Crossing pipeline, Length of pipeline, Stress, Strain, Finite element analysis

摘要： 为了研究有固定墩单管直接跨越管道在自重及内压作用下的受力情况,利用有限元分析软件ANSYS
对管道进行了有限元分析,并通过改变同一跨越管道的跨长和管道外径,进行了数值模拟分析。通过分析,找出了
有固定墩单管直接跨越管道的应力集中点及管道失效点。结果表明,随着跨长的增加,管道自重和内压对跨越管道
的应力和应变的影响逐渐增加,当跨长超过25m 时,此跨越管道处于危险失效状态;当跨长一定时,管道应力和应
变随半径的增加而增大,当半径为610mm 时,此跨越管道失效。为了避免跨越管道的失效,在设计计算和安装时,
需要综合考虑跨越管道的受力影响因素,使用桁架跨越、悬索跨越等其他跨越形式。

关键词: 跨越管道, 跨长, 应力, 应变, 有限元分析