RESEARCH ON MONITORING AND DIAGNOSIS TECHNOLOGY OF ROLLER COASTER TRACK STRESS BASED ON FIBER BRAGG GRATING

Roller coaster bears alternating load, and fatigue damage is one of the main ways of its failure, and the fatigue of roller coaster structure and the resulting safety problems are becoming more and more prominent. With the rapid construction of large amusement facilities and the increasingly complex forms of movement, safety accidents caused by their failure occur from time to time. In this paper, according to the practical needs of the roller coaster track structure operation safety, the key failure parts of the roller coaster track structure are analyzed, and the fiber Bragg grating strain monitoring technology is used for real-time online monitoring of the key failure parts; Based on the monitoring stress spectrum data, the statistical counting method and cumulative damage theory are used to diagnose and predict the damage situation of the monitoring points, and the cumulative damage degree and crack initiation life of each monitoring point are given, so as to provide support for enterprises to make maintenance plans, and make the original cumbersome and difficult data acquisition more reliable, safe and convenient, Improve the ability and level of roller coaster monitoring and management.