Distributed stress measurement for water pressure test of diversion steel branch pipe

被引：0

作者：

Yin, Guolu ^{[1
,2
]}

Ma, Jingming ^{[2
]}

Jiang, Shengxian ^{[3
]}

Wang, Xing ^{[2
]}

Zhang, Yuanyin ^{[2
]}

Zhu, Tao ^{[1
,2
]}

机构：

[1] Chongqing University, State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing

[2] Chongqing University, Key Laboratory of Optoelectronic Technology and Systems （Ministry of Education）, Chongqing

[3] Chongqing Branch, Changjiang River Scientific Research Institute, Chongqing

来源：

Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2024年 / 32卷 / 17期

关键词：

distributed stress measurement; diversion steel branch pipe; optical frequency domain reflectometer; pumped storage;

D O I：

10.37188/OPE.20243217.2635

中图分类号：

学科分类号：

摘要：

The diversion steel branch pipe is large and complex to weld, requiring endurance for long-term water pressure of 6 MPa. There is a need for a high-precision, high-resolution stress measurement technique for comprehensive assessment during water pressure tests. Traditional strain gauges are limited to localized measurements and restricted by waterproofing, application processes, and temperature changes. This study proposes using optical frequency domain reflectometry for stress measurement in the pipe. A standard single-mode fiber sensor is laid along the weld seam for a spatial resolution of 5.8 cm. Stress correlates linearly with water pressure and varies periodically from 0.2 to 0.6 m along the weld seam. Maximum stress reaches 196.2 MPa at the crescent rib weld seam's waist, about 300 MPa at the main conical ring seam, and distributes symmetrically along the intersecting line, with a peak of 352.0 MPa near the waistline and minimal stress at the top and bottom. © 2024 Chinese Academy of Sciences. All rights reserved.

引用

页码：2635 / 2644

页数：9

共 25 条

[1] Analysis of the current situation and development prospects of pumped storage power stations in China ［C］, Proceedings of the Collection of Papers on the Construction of Pumped Storage Power Stations in 2019, (2019)
[2] ZHANG D Q., Analysis on GIS site selection and equipment installation of pumped storage power station［J］, Energy Storage Science and Technology, 11, 12, pp. 4100-4101, (2022)
[3] WANG X D., Research and practice on economic dispatching of reservoir emptying during operation period of cascade power stations［J］, Sichuan Water Power, 41, 2, pp. 126-130, (2022)
[4] ZHU CH, YUAN X., Structural stress test analysis and evaluation of steel bifurcated pipe in pumped storage power station［J］, Welding Technology, 51, 11, pp. 43-48, (2022)
[5] NB/T 35056-2015 Design Code for Steel Penstocks of Hydroelectric Stations［M］
[6] Code for manufacture installation and acceptance of steel penstocks in hydroelectric and hydraulic engineering： GB 50766—2012［S］, (2012)
[7] LIAO J，QU G., Application of construction technology for integral transportation and installation of domestic 800MPa high-strength steel bifurcated pipe with high HD value［J］, Mechanical & Electrical Technique of Hydropower Station, 39, S1, pp. 37-41, (2016)
[8] WEI Q H, YU J F，, ZHANG X M，, Et al., Hydraulic pressure test of steel bifurcated pipe for a diversion-type hydropower station［J］, Guangxi Water Resources & Hydropower Engineering, 2, pp. 10-13, (2019)
[9] LIU R, BAI W., Test and research on residual stress of diversion steel bifurcation pipe of Fengning pumped storage power station［J］, Hydropower and Pumped Storage, 6, 4, pp. 110-116, (2020)
[10] ZHANG Y M, QIAN Y Y, SONG R X., Study on hydraulic test of steel bifurcated pipe of qingyuan pumped storage power station［J］, Water Resources and Hydropower Engineering, 54, S2, pp. 67-72, (2023)

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