• Title/Summary/Keyword: Pre-pilot mining test

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Axial Vibration Analysis of Umbilical Cable with Pilot Mining Robot using Sea Test Data (실해역 시험 데이터를 이용한 파일럿 채광로봇 엄빌리컬 케이블의 축진동 해석)

  • Min, Cheon-Hong;Yeu, Tae-Kyeong;Hong, Sup;Kim, Hyung-Woo;Choi, Jong-Su;Yoon, Suk-Min;Kim, Jin-Ho
    • Journal of Ocean Engineering and Technology
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    • v.29 no.2
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    • pp.128-134
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    • 2015
  • Axial vibration analysis is very important for a deep-seabed mining system. In this study, an axial vibration analysis was carried out to estimate the natural frequencies and tensions of the umbilical cable using experimental data obtained from the first pre-pilot mining test. The axial vibrations of the umbilical cable with a pilot mining robot at the bottom end were analytically determined. The range of the added mass coefficients of the pilot mining robot is estimated by comparing the experimental and analytical data. The natural frequencies and maximum tensions are calculated using four estimated added mass coefficients.

Risk-based Design of On-board Facility for Lifting System Field Test of Deep-sea Mining System (심해저 광물자원 양광시스템 실증 시험을 위한 위험도 기반 선상 설비 설계)

  • Cho, Su-gil;Park, Sanghyun;Oh, Jaewon;Min, Cheonhong;Kim, Seongsoon;Kim, Hyung-Woo;Yeu, Tae Kyung;Jung, Jung Yeul;Bae, Jaeil;Hong, Sup
    • Journal of Ocean Engineering and Technology
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    • v.30 no.6
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    • pp.526-534
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    • 2016
  • This study had the goal of designing onboard structures for a pre-pilot mining test (PPMT), which is required for the commercialization of the deep-sea mining industry. This PPMT is planned to validate the performance of a hydraulic lifting system and verify the concept of operating through a moon-pool in the east sea, Korea. All of the onboard equipment and facility were designed by KRISO. Because the test was performed at the first development, it is difficult to determine what risk will occur in the facility. Therefore, risk-based design is required in the facility for the PPMT, which includes the facility layout, failure mode and effect analysis (FMEA), and risk reduction plan. All of the expected performances of the lifting system itself and the onboard facilities were qualitatively validated using the risk-based design.