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Preliminary Study on Deformation During Hydrostatic Testing in a Deep Tankopen accessPreliminary Study on Deformation During Hydrostatic Testing in a Deep Tank

Other Titles
Preliminary Study on Deformation During Hydrostatic Testing in a Deep Tank
Authors
김근곤안태현이탁기
Issue Date
2022
Publisher
한국해양공학회
Keywords
Deep tank; Hydrostatic tes; Deformationㅌ; Structural analysis; Beam theory; 디프 탱크; 수압 시험; 변형; 구조해석; 보이론
Citation
한국해양공학회지, v.36, no.2, pp 115 - 124
Pages
10
Indexed
KCI
Journal Title
한국해양공학회지
Volume
36
Number
2
Start Page
115
End Page
124
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/2379
DOI
10.26748/KSOE.2021.075
ISSN
1225-0767
2287-6715
Abstract
There are many different types of tanks on ships that meet various requirements. Each tank is required to undergo hydrostatic testing according to the Ship Safety Act after being installed onboard. In some hydrostatic tests, excessive deformation may occur. The overpressure of the air in the tank generated during testing is one of the possible causes of deformation. Based on the dimensions of the tank, nozzle, and pipes installed, it was confirmed that the overpressure of the air can cause problems with the structure, according to the Bernoulli equation. Additionally, finite element analysis (FEA) was performed on the tank structure to confirm the deformation and the stress occurring in the structure. From the perspective of deformation, the maximum deflection limit was set based on the criteria provided by the Eurocode and DNV. From the perspective of stress, the structural safety assessment was performed by comparing the allowable stress and equivalent stress generated in the structure. To determine whether the behavior of the actual structure was well implemented via FEA, beam theory was applied to the tank structure and compared with the FEA results. As a result of the analysis, severe deformation was found in some cases. This means that the overpressure of the air may be the cause of actual deformation. It was also confirmed that permanent deformation may occur.
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해양과학대학 (조선해양공학과)
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