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Representative Environmental Condition for Fatigue Analysis of Offshore Jacket Substructure.
- Source :
-
Energies (19961073) . Oct2020, Vol. 13 Issue 20, p5494-5494. 1p. - Publication Year :
- 2020
-
Abstract
- The 20-year cumulative fatigue damage of an offshore jacket substructure was estimated under the long-term local environmental conditions in the Taiwan Strait. Because of the nonlinearity of wave load for slender members of the structure, time-domain simulations of the dynamic finite element model were conducted for each sea state. By utilizing the Dirlik method to process the stress signals, the fatigue damages of joints were computed. Concerning the computational time, we propose a probability-based method of using a representative combination of environmental conditions in this study, which can considerably reduce the required number of evaluations prior to determining fatigue damage, thereby improving the process of preliminary design. The results show that only three sea states among 120 can represent 28% of the average damage ratio, and up to 17 sea states fully resolved the fatigue life. [ABSTRACT FROM AUTHOR]
- Subjects :
- *OCEAN waves
*FATIGUE life
*ENVIRONMENTAL sciences
*SIGNAL processing
Subjects
Details
- Language :
- English
- ISSN :
- 19961073
- Volume :
- 13
- Issue :
- 20
- Database :
- Academic Search Index
- Journal :
- Energies (19961073)
- Publication Type :
- Academic Journal
- Accession number :
- 147002574
- Full Text :
- https://doi.org/10.3390/en13205494