The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Dynamic Analysis of Underwater Test Collector on Extremely Soft Soil

해저연약지반 시험집광기의 동적거동 해석

  • Kim, Hyung-Woo (Ocean Engineering Research Department, MOERI/KORDI) ;
  • Hong, Sup (Ocean Engineering Research Department, MOERI/KORDI) ;
  • Choi, Jong-Su (Ocean Engineering Research Department, MOERI/KORDI) ;
  • Yeu, Tae-Yeong (Ocean Engineering Research Department, MOERI/KORDI)
  • 김형우 (한국해양연구원 해양시스템연구부) ;
  • 홍섭 (한국해양연구원 해양시스템연구부) ;
  • 최종수 (한국해양연구원 해양시스템연구부) ;
  • 여태경 (한국해양연구원 해양시스템연구부)
  • Published : 2008.08.31
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Abstract

We conducted a dynamic analysis of an underwater test collector, which operates on extremely soft soil of deep-seafloor. The underwater test collector consists of nodule pick-up device, vehicle tracks, nodule crusher, loading frame and electric-electronic system. The weight of underwater test collector is about 8600 kg. The average normal pressure, that the underwater test collector supports, is about 6.0 kPa. The dynamic analysis model of underwater test collector is developed using commercial software RecurDyn-LM and Visual Fortran 90. A terramechanics model of extremely soft soil is implemented to the software based on user-written subroutine and applied to the dynamic analysis of the underwater test collector model. The dynamic responses of test collector are studied with respect to track velocities, terrain conditions, and coefficients of added mass and drag.

본 논문은 해저 연약지반 위를 주행하는 시험집광기의 동적거동 해석을 다루고 있다. 시험집광기는 단괴채집장치, 무한궤도, 단괴파쇄기, 샤시프레임, 전기 전자 시스템으로 구성되어 있다. 시험집광기의 공기 중 무게는 8,600 kg이며, 수중에서의 시험집광기의 평균접지압은 6.0 kPa이다. 상용해석 프로그램인 RecurDyn-LM과 Visual Fortran 90을 이용하여 시험집광기의 동적거동 해석 모델 및 유체저항력 모델을 구축하였다. 상용해석 프로그램(RecurDyn-LM)에서 제공되는 사용자 정의 서브루틴을 이용하여 연약지반역학 모델 및 유체저항력 모델을 구축하였으며, 이를 통하여 해저 시험집광기의 동적거동 해석을 수행하였다. 궤도속도, 지반조건, 항력계수 및 추가질량 계수의 변화에 따른 시험집광기의 동적응답을 분석하였다.

Keywords

References

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