DAMAGE DETECTION IN OFFSHORE FIXED PLATFORMS USING CONCEPTS OF ENERGY ENTROPY IN WAVELET PACKET TRANSFORM

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RAHAMI H.; AMINI TEHRANI H.; AKHAVAT M.; GHODRATI AMIRI GH.R.

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Paper Information

Journal: AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR) Year:2016 | Volume:48 | Issue:3 Page(s): 241-248

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Title

DAMAGE DETECTION IN OFFSHORE FIXED PLATFORMS USING CONCEPTS OF ENERGY ENTROPY IN WAVELET PACKET TRANSFORM

Author(s)

RAHAMI H. | AMINI TEHRANI H. | AKHAVAT M. | GHODRATI AMIRI GH.R. | Issue Writer Certificate

Keywords

STRUCTURAL HEALTH MONITORINGQ1

SIGNAL PROCESSINGQ2

WAVELET PACKET TRANSFORMQ1

ENERGY ENTROPYQ1

SENSITIVITY ANALYSISQ1

Abstract

STRUCTURAL HEALTH MONITORING is of great importance in order to ensure safe and reliable performance of structures during the service life. Offshore platforms have been widely used in offshore oil and gas exploitation and are highly susceptible to damage since a major part of these structures is under water exposed to corrosive ocean environments. Utilizing SIGNAL PROCESSING tools is one of the effective methods in identifying the structural damages. In this paper, first a jacket platform model is introduced and various damage patterns are applied to the model through members’ stiffness reduction. Then, structural response is recorded under the Gaussian white noise excitation. At this stage, the recorded acceleration response is decomposed at different levels via WAVELET PACKET TRANSFORM and then by using the concepts of ENERGY ENTROPY and performing a SENSITIVITY ANALYSIS, damage sensitive components are selected. The results show that the selected damage sensitive components have good efficiency even in low intensity damages and also the rate of change of these components is markedly related to the severity of the damage.

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APA: Copy

RAHAMI, H., AMINI TEHRANI, H., AKHAVAT, M., & GHODRATI AMIRI, GH.R.. (2016). DAMAGE DETECTION IN OFFSHORE FIXED PLATFORMS USING CONCEPTS OF ENERGY ENTROPY IN WAVELET PACKET TRANSFORM. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), 48(3), 241-248. SID. https://sid.ir/paper/165532/en

Vancouver: Copy

RAHAMI H., AMINI TEHRANI H., AKHAVAT M., GHODRATI AMIRI GH.R.. DAMAGE DETECTION IN OFFSHORE FIXED PLATFORMS USING CONCEPTS OF ENERGY ENTROPY IN WAVELET PACKET TRANSFORM. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR)[Internet]. 2016;48(3):241-248. Available from: https://sid.ir/paper/165532/en

IEEE: Copy

H. RAHAMI, H. AMINI TEHRANI, M. AKHAVAT, and GH.R. GHODRATI AMIRI, “DAMAGE DETECTION IN OFFSHORE FIXED PLATFORMS USING CONCEPTS OF ENERGY ENTROPY IN WAVELET PACKET TRANSFORM,” AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), vol. 48, no. 3, pp. 241–248, 2016, [Online]. Available: https://sid.ir/paper/165532/en

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