Izvorni znanstveni članak
https://doi.org/10.21278/brod75201
Subsea jumper damage detection based on fractal analysis and modal characteristics
Yan Li
; Department of Marine Engineering, Dalian Maritime University, 116026 Dalian, P.R China
XingKun Zhou
; Department of Marine Engineering, Dalian Maritime University, 116026 Dalian, P.R China
WenHua Li
; Department of Marine Engineering, Dalian Maritime University, 116026 Dalian, P.R China
Sažetak
Subsea jumpers play a critical role in subsea oil and gas production. Structural damage such as cracks is inevitable in subsea jumpers due to the harsh marine environment (internal fluid flow corrosion, high temperature and pressure, etc.). However, the current research on damage detection and evaluation of subsea jumpers is limited, particularly in cases of slight damage. This study thus proposes a method to identify cracks in subsea jumpers based on the modal characteristics and fractal theory. The accuracy of the method is verified by comparing the finite element simulation method via APDL and the analytical method via MATLAB. In addition, the sensitivity of the method to noise is investigated. The results indicate that the method accurately identifies cracks (single and multiple) with a minimum depth of 0.2 mm in various locations on subsea jumpers. This study may hold significant reference value for improving the safety and reliability of subsea jumpers.
Ključne riječi
Subsea jumper; Damage detection; Small crack; Modal characteristics; Fractal theory
Hrčak ID:
316164
URI
Datum izdavanja:
1.4.2024.
Posjeta: 48 *