Structural health monitoring of composite bogie side frame using Brillouin optical correlation domain analysis system

초록

In this paper, the structural deformation of the bogie side frame manufactured by composite material was monitored on a real time using the distributed optical fiber sensor system. The optical fiber was attached on a 3m section of a side frame lower part. When the train load of 14ton was perpendicularly applied to a bogie side frame manufactured by composite material, the whole strain distribution was monitored using optical fiber sensor. The distributed optical fiber sensor system which has 3cm spatial resolution using the Brillouin correlation domain analysis (BOCDA) technique for the monitoring of the distributed strain was developed and used. The distributed strain measured by the optical fiber coincided well with the FE analysis data. Acquired optical fiber sensor signal was used to verify the design of the bogie manufactured by composite material and to monitor the structural health when the vertical load was applied.