CFD Analysis of Underwater Standard Penetration Test Equipment

doi:2012.26.6.33

J. Ocean Eng. Technol. > Volume 26(6); 2012 > Article

J. Ocean Eng. Technol. 2012;26(6):33-38.
DOI: https://doi.org/10.5574/KSOE.2012.26.6.033

Ko Jin Hwan,Jang In Sung,Kim Woo Tae,Kwon O Soon,Baek Won Dae

Coastal Development and Ocean Energy Research Division KIOST,Coastal Development and Ocean Energy Research Division KIOST,Coastal Development and Ocean Energy Research Division KIOST,Coastal Development and Ocean Energy Research Division KIOST,Coastal

해저 표준관입시험 장비의 밀폐형 항타부 CFD 해석

고진환,장인성,김우태,권오순,백원대

한국해양과학기술원 연안개발.에너지연구부,한국해양과학기술원 연안개발.에너지연구부,한국해양과학기술원 연안개발.에너지연구부,한국해양과학기술원 연안개발.에너지연구부,한국해양과학기술원 연안개발.에너지연구부

Keywords: Offshore geotechnical investigations, SPT(Standard Penetration Test) equipment, Closed penetration part, CFD analysis

핵심용어: 수중지반조사, 표준관입시험 장치, 밀폐형 항타부, CFD 해석

Abstract

In our study, a closed-type penetration unit for standard penetration test (SPT) equipment was developed in order to operate in an underwater environment. This type causes energy dissipation, mainly due to the small gap between an airtight case and moving hammer. The dissipation was estimated through a CFD analysis. The computed dissipated energy was less than 1.2% compared to the potential energy of the hammer with the given gap. Subsequently, the impact energy of the underwater SPT equipment was within 1.2% of that for the SPT equipment on land.