Last modified: 2013-04-21
Abstract
Risers are used to transport crude oil and may require management plans and programs of structural integrity to allow a proper functioning during its design life. Through Structural Health Monitoring (SHM) damage can be detected ahead, and be confirmed by nondestructive inspection assisted by remotely operated vehicles with the information obtained in order to prevent disasters such as environmental pollution, and human and economic losses.
This paper presents a comparative study for damage detection starting from processing of dynamic signals. Numerical study cases were defined for a Steel Catenary Riser (SCR) installed offshore with a depth of 1800 m. Two damage cases were studied decreasing stiffness values at specific location of the structure. Dynamic analyzes were performed using a commercial software that incorporates nonlinear behavior. Three damage detection methods were applied for damage location. Results demonstrate the effectiveness of the proposed technique to detect damage in deep-water SCR.