作者：陈光1, 丁克勤1, 种玉宝2, 厉溟3, 胡亚男1
作者单位：1. 中国特种设备检测研究院，北京 100013;
2. 大连锅炉压力容器检验检测研究院有限公司，辽宁 大连 116001;
3. 大连港油品码头公司，辽宁 大连 116000
关键词：光纤光栅;变形;应变;大型储罐
摘要：
为避免大型原油浮顶储罐服役过程中罐壁变形引起的事故问题，提出基于光纤光栅传感技术的罐壁变形应变监测方法，设计大型储罐罐壁变形应变在线监测系统和试验方案。在实验室对储罐罐壁模型开展变形应变监测的实验研究，结果表明，光纤光栅传感器和电阻应变片在同一位置不同载荷作用下随时间变化的应变数据中，除FBG5和YBP5在卸载阶段（13次~16次、20次~22次）测量误差较大外，其余位置的加载时刻，光纤光栅传感器和电阻应变片的应变测量误差均在7με以内。在某油库现场对大型原油储罐罐壁开展变形应变监测的应用研究，结果表明，提出的方法和设计的在线监测系统能够得到光纤光栅传感器布设位置的储罐罐壁在各种因素作用下的应变变化，依据胡克定律给出的应力应变关系和强度理论，给出储罐罐壁状态；监测传感器平均采集率为89.77%，整体监测实时性良好，实现储罐变形的有效监测，验证提出的方法和设计的在线监测系统实时监测储罐罐壁变形应变的可行性。
Experimental study on deformation and strain monitoring of large crude oil storage tank wall
CHEN Guang1, DING Keqin1, CHONG Yubao2, LI Ming3, HU Ya'nan1
1. China Special Equipment Inspection and Research Institute, Beijing 100013, China;
2. Dalian Boiler and Pressure Vessel Inspection & Testing Institute Co., Ltd., Dalian 116001, China;
3. Dalian Port Oil Terminal Company, Dalian 116000, China
Abstract: In order to avoid accidents caused by tank wall deformation during the service of large crude oil floating roof tank, the monitoring method of tank wall deformation and strain based on Fiber Bragg grating sensing technology is proposed, and an on-line monitoring system and test scheme of tank wall deformation and strain of large crude oil floating roof tank are designed. The strain monitoring experiment was developed on the tank wall model in the laboratory. The results show that the strain data both the fiber grating sensor and the resistance strain gauge are collected at the same position and under different loads, the measurement error is bigger except for FBG5 and YBP5 in the unloading stage (13 times to 16 times, 20 times to 22 times), the strain measurement errors are within 7 με at the other loading moments and other positions. The experimental study on the deformation and strain monitoring of the tank wall was carried out by using the large crude oil storage tank. The results show that the proposed method and the designed on-line monitoring system can get the strain changes of the tank wall under the action of various factors, and which is given for the state of the tank wall according to the stress-strain relationship given by Hooke's law and strength theory. The average acquisition rate of the monitoring sensor is 89.77%, and the overall real-time monitoring is good, which realizes the effective monitoring of tank wall deformation, and verifies the feasibility of the proposed method and the designed on-line monitoring system for real-time monitoring of tank wall deformation and strain.
Keywords: fiber grating;deformation;strain;large storage tank
2022, 48(9):164-170 收稿日期: 2021-03-21;收到修改稿日期: 2021-07-30
基金项目: 国家重点研发计划（2018YFF0214702）；中国特种设备检测研究院内部项目（2019 青年08）
作者简介: 陈光（1980-），女，辽宁北票市人，高级工程师，博士，主要研究方向为光纤传感、光学测量与结构健康监测等
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