Research on Stress Monitoring Method of Pressure Vessels Based on FBG Sensing Technology

Through modeling and analysis, the loading conditions of a certain cylindrical pressure vessel for storing special fuel were derived. The mechanical response characteristics under specific working conditions were analyzed by employing Workbench, and the circumferential and axial stress distribution characteristics of the pressure vessel were clarified. Based on the above outcomes, a stress monitoring scheme based on fiber Bragg grating was constructed. The stress values at the corresponding positions were determined through system experiments. By comparing the measured data with the simulation results, the scientificity and feasibility of the stress monitoring method were verified, providing an engineering implementable technical approach for the structural health monitoring of this type of pressure vessel.