Application Study on FMEA(Failure Mode and Effect Analysis) for Waterjet-lifter of Deep-Sea Manganese Nodule Miner

J. Ocean Eng. Technol. 2009;23(6):32-38.

Choi Jong-Su,Hong Sup,Lee Tae-Hee,Kim Hyung-Woo,Yeu Tae-Kyeong

Ocean Engineering Research Department KORDI,Ocean Engineering Research Department KORDI,Hanyang University,Ocean Engineering Research Department KORDI,Ocean Engineering Research Department KORDI

심해저 망간단괴 집광시스템의 물제트부양장치에 대한 FMEA 적용 연구

최종수,홍섭,이태희,김형우,여태경

한국해양연구원 해양시스템연구부,한국해양연구원 해양시스템연구부,한양대학교 기계공학부,한국해양연구원 해양시스템연구부,한국해양연구원 해양시스템연구부

Keywords: DSNM(Deep-sea manganese nodule miner), Waterjet-lifter, Axiomatic design, FMEA(Failure mode and effect analysis)

핵심용어: 심해저 망간단괴 집광시스템, 물제트부양장치, 공리적 설계, 고장형태 영향분석

Abstract

An FMEA for the waterjet-lifter of a DSNM is performed to prevent the occurrence of device failure. A waterjet-lifter raises and transports manganese nodules from the deep-sea floor up to a somewhat elevated place, from which a pin-scraper transports the lifted nodules to the inner space of the DSNM. A concept design for a device using the axiomatic design methodology is shown as the mapping between the functional domain and physical domain. The FMEA for a DSNM is introduced briefly and the rating criteria of severity, occurrence, and detection for the DSNM are defined. The FMEA of the functional requirements of a DSNM device is accomplished. Three kinds of failure modes, as well as their effects and causes, are predicted. Current design control methods for detecting potential failures, such as physical or computational experiments, design confirmation, and mathematical calculation, are described and the recommended actions for several significant causes are suggested.