1.南京大学地球科学与工程学院,江苏 南京 210023
2.南京大学(苏州)高新技术研究院,江苏 苏州 215123
杨晓蔚(1996—),男,硕士研究生。主要从事构筑物应力监测及岩土工程数值分析等方面的研究。 E-mail:MF1829034@smail.nju.edu.cn
纸质出版:2021-10-15
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杨晓蔚,刘春,张晓宇等.基于OFDR的不连续管道竖向错开变形定量监测∗[J].防灾减灾工程学报,2021,41(05):1087-1095.
YANG Xiaowei,LIU Chun,ZHANG Xiaoyu,et al.Quantitative Monitoring of Vertical Staggered Deformation of Discontinuous Pipeline based on OFDR[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1087-1095.
杨晓蔚,刘春,张晓宇等.基于OFDR的不连续管道竖向错开变形定量监测∗[J].防灾减灾工程学报,2021,41(05):1087-1095. DOI: 10.13409/j.cnki.jdpme.201905051.
YANG Xiaowei,LIU Chun,ZHANG Xiaoyu,et al.Quantitative Monitoring of Vertical Staggered Deformation of Discontinuous Pipeline based on OFDR[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1087-1095. DOI: 10.13409/j.cnki.jdpme.201905051.
近年来逐步发展起来的分布式光纤传感技术被大量应用于管道变形监测当中,而现有的光纤传感技术无法满足高空间分辨率的要求,采用一种新型的光频域分布式光纤传感技术(OFDR),对不连续管道在加荷条件下的竖向错开变形进行室内模型试验研究,提出了一种定量计算方法,并将计算值与千分表监测的实际值进行对比分析。室内试验的结果表明,OFDR能够精确地反映监测部位的应变,揭示不连续管道接缝处的变形规律。通过所提出的算法将应变值转化为竖向错开变形量,并与千分表的监测值进行对比分析。提出的算法能够定量监测不连续管道的竖向变形量,为实际工程提供竖向错开变形的下限值,为实际工程中的管道安全和预警提供依据。
In recent years, distributed optical fiber sensing technology has been widely used in pipeline deformation monitoring, but the existing optical fiber sensing technology can not meet the requirements of high spatial resolution.A new optical frequency domain distributed optical fiber sensing technology (OFDR) is used to conduct laboratory model tests on vertical staggered deformation of discontinuous pipelines under loading conditions, a quantitative calculation method is proposed, and the calculated value is compared with the actual value of the micrometer monitoring. The results of laboratory tests show that OFDR can accurately reflect the strain at the monitoring site and reveal the deformation law at the joints of discontinuous pipelines. The strain value is transformed into the vertical staggered deformation value by the proposed algorithm, and is compared with the monitoring value of the micrometer. The proposed algorithm can quantitatively monitor the vertical deformation of discontinuous pipelines.This calculation method can provide lower limit value of vertical staggered deformation for practical engineering, and provide a basis for pipeline safety and early warning in practical engineering.
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