基于分布式光纤传感器的埋地管道结构状态监测方法

发布时间：2018-05-27 17:42

本文选题：埋地管道 + 结构状态评估　；参考：《油气储运》2017年11期

【摘要】：油气管道结构状态退化以及损伤缺陷的发生具有显著的时空分布不确定性。为了实时评估埋地管道的结构状态,提出一种基于分布式光纤传感器的埋地管道监测方案,建立了基于分布式监测数据的埋地管道结构状态的定量评估方法,并以某埋地燃气管道为例加以应用。结果表明:基于分布式光纤传感器的监测方案,可与埋地管道施工工艺无缝衔接,便于实际操作;分布式光纤传感器可以准确获得埋地管道弯曲应变与管体温度的时空演化行为,克服了常用点式传感器无法覆盖管道整体的局限;利用管道弯曲应变、管体温度的分布式监测数据,再辅以管道的材料、几何参数以及内压监测数据,可以实时、定量评估埋地管道的结构状态,从而为埋地管道全寿命周期结构状态的评估提供依据。
[Abstract]:The structural degradation of oil and gas pipelines and the occurrence of damage defects have significant spatial and temporal uncertainty. In order to evaluate the structural state of buried pipeline in real time, a monitoring scheme of buried pipeline based on distributed optical fiber sensor is proposed, and a quantitative evaluation method of buried pipeline structure based on distributed monitoring data is established. And take a buried gas pipeline as an example to be applied. The results show that the monitoring scheme based on distributed optical fiber sensor can be seamlessly connected with the construction technology of buried pipeline and is convenient for practical operation. Distributed optical fiber sensor can accurately obtain the time-space evolution behavior of buried pipeline bending strain and tube temperature, which overcomes the limitation that common point sensor can not cover the whole pipeline. The distributed monitoring data of the temperature of the pipe, supplemented by the material, geometric parameters and internal pressure monitoring data of the pipeline, can be used to quantitatively evaluate the structural state of the buried pipeline in real time. Therefore, it provides the basis for the evaluation of the whole life cycle structural state of buried pipeline.
【作者单位】：大连理工大学建设工程学部;大庆油田工程有限公司;
【基金】：国家自然科学基金面上项目“寒区埋地管道的分布式结构健康监测与实时安全预警方法研究”,51378088 国家重点研发计划课题“既有供水与排水管网系统健康诊断和管道修复技术与装备”,2016YFC0802402
【分类号】：TE973.6

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