摘要
科学合理的管道安全监测技术对管道工程运行具有重要意义,开展了基于分布式光纤传感技术的管道受弯变形监测试验研究。针对现有分布式光纤变形计算方法的不足,提出了分布式光纤监测管道受弯变形计算方法,编写了基于MATLAB的分布式光纤管道受弯变形计算程序。研究结果表明,基于分布式光纤传感技术的管道受弯变形监测方法整体测量精度较高,在变形量小于180 mm范围内时绝对误差小于4 mm,平均相对误差在2%以内;当变形量较大时,绝对误差随之增大,但是平均相对误差在3. 2%以下。初步开展了基于分布式光纤传感技术的管道受力分析,结果表明模拟所得管道剪力模式与理论模式以及实际情况较为吻合。基于分布式光纤传感技术的受弯变形监测方法测量精度较高,误差较小,能够满足管道受弯变形监测要求,具有较好的应用前景,是一种理想的变形监测技术,同时该方法也能拓展应用到管道受力等其他安全分析中。
Scientific and reasonable pipeline safety monitoring technology is of great significance to pipeline engineering operation.This paper carries out the experiment study on pipeline bending deformation monitoring based on distributed optical fiber sensing technology.Aiming at the deficiency of existing distributed fiber deformation calculation method,a calculation method of pipeline bending deformation monitoring using distributed optical fiber sensor is proposed,and the calculation program of pipeline bending deformation using distributed optical fiber sensor based on MATLAB is written.The study results show that the proposed pipeline bending deformation monitoring method based on distributed optical fiber sensing technology has high overall measurement accuracy.Within the bending deformation range of 180 mm,the absolute error is less than 4 mm and the average relative error is within 2%.When the bending deformation is getting larger,the absolute error increases,however the average relative error is below 3.2%.The pipeline force analysis based on distributed optical fiber sensing technology was carried out preliminarily.The results show that the simulated pipeline shear force pattern is in good agreement with the theoretical pattern and the actual situation.The proposed pipeline bending deformation monitoring method based on distributed optical fiber sensing technology possesses high measurement accuracy and small error,which can meet the requirements of pipeline bending deformation monitoring and has good application prospect.The method is an ideal deformation monitoring technology and can also be extended to the application of other safety analysis such as pipeline force analysis and etc.
作者
许滨华
何宁
何斌
李登华
吴帅
Xu Binhua;He Ning;He Bin;Li Denghua;Wu Shuai(Geotechnical Engineering Department,Nanjing Hydraulic Research Institute,Nanjing210029,China;College of Civiland Transportation Engineering,Hohai University,Nanjing210098,China;Key Laboratory of Earth-Rock DamFailure Mechanism and Safety Control Techniques,Ministry of Water Resources,Nanjing210029,China;Nanjing Cazor Instruments Co.,Ltd,Nanjing210037,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2019年第8期20-30,共11页
Chinese Journal of Scientific Instrument
基金
国家重点研发计划课题(2017YFC0405100)
国家重点研发计划课题(2018YFC1508505)
国家自然科学基金面上项目(51579152)资助
关键词
管道安全
分布式光纤传感技术
变形监测
MATLAB
pipeline safety
distributed optical fiber sensing technology
deformation monitoring
MATLAB
