Experimental Study of Structural Crack Monitoring for Ocean Platform Based on a Hybrid Fiber Sensing Technique

Aging offshore platforms pose safety risks, with cracks compromising integrity. A novel crack monitoring method using displacement, strain, and a stress intensity factor was proposed. Hybrid fiber sensing on a jacket platform model proved effective for comprehensive offshore crack monitoring. Simulation guided the design of displacement sensors and sensing tapes. Experiments validated the system’s efficacy with a greater than 0.99 linear correlation for optical fiber sensors, a less than 5% average sensitivity error, and a greater than 95% strain transfer rate for tapes. Field tests affirmed high sensitivity and accuracy—vital for offshore platform safety.