光学精密工程2024，Vol.32Issue(17)：2635-2644,10.DOI:10.37188/OPE.20243217.2635
引水钢岔管水压试验分布式应力测量
Distributed stress measurement for water pressure test of diversion steel branch pipe
摘要
Abstract
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 tech-nique for comprehensive assessment during water pressure tests.Traditional strain gauges are limited to lo-calized 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 corre-lates 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 waist-line and minimal stress at the top and bottom.关键词
分布式应力测量/光频域反射仪/引水钢岔管/抽水蓄能Key words
distributed stress measurement/optical frequency domain reflectometer/diversion steel branch pipe/pumped storage分类
电子信息工程引用本文复制引用
尹国路,马璟铭,姜胜先,王鑫,张元寅,朱涛..引水钢岔管水压试验分布式应力测量[J].光学精密工程,2024,32(17):2635-2644,10.基金项目
国家重点研发计划资助项目(No.2023YFF0715700) （No.2023YFF0715700）
