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Keywords: mining manganese nodule
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Proceedings Papers
Active Control of Longitudinal Vibration And Axial Stress Caused In Pipe String For Mining Manganese Nodules In Deep Sea
Available to Purchase
Paper presented at the The Ninth International Offshore and Polar Engineering Conference, May 30–June 4, 1999
Paper Number: ISOPE-I-99-157
... system. INTRODUCTION For mining manganese nodules from deep-sea floor, a pipe string is needed to connect the mining ship on the sea surface with the miner on the sea floor, as shown in Fig. 1. Furthermore, in the pump-liR system, the string must be equipped with one or more pump modules for pumping...
Proceedings Papers
Axial-Stress Control of Pipe String For Mining Manganese Nodules In Deep Sea By Using Multi-Stepped Pipe
Available to Purchase
Paper presented at the The Ninth International Offshore and Polar Engineering Conference, May 30–June 4, 1999
Paper Number: ISOPE-I-99-016
... produced in the string. Then, it is found that the multi-stepped pipe string with larger diameter at the upper part could reduce the axial stress induced in the pipe string by almost 22 ~ 31% as compared with that of the uniform pipe string. INTRODUCTION For mining manganese nodules from deep-sea floors...
Proceedings Papers
The Optimum Condition of Vibration Absorber Used In Water
Available to Purchase
Paper presented at the The Eighth International Offshore and Polar Engineering Conference, May 24–29, 1998
Paper Number: ISOPE-I-98-131
... nodules from deep sea floors and have been feeling the necessity of fundamental studies on that condition. frequency-response curve coefficient vibration absorber peak amplitude optimum absorber design parameter equation double peak amplitude pipe string amplitude mining manganese nodule...
Proceedings Papers
Longitudinal Vibration-Control of Pipe String For Mining Manganese Nodules In Deep Sea With an Elastic Support
Available to Purchase
Paper presented at the The Seventh International Offshore and Polar Engineering Conference, May 25–30, 1997
Paper Number: ISOPE-I-97-022
... for Mining Manganese Nodules in Deep Sea with an Elastic Support Yoshikazu Kobayashi and Kazuo Aso Akita University Akita, Japan ABSTRACT In order to reduce the longitudinal vibration of a pipe string for mining manganese nodules from deep sea floors, the pipe string was assumed to be supported by a linear...
Proceedings Papers
The Effects of Vibration Absorbers With Nonlinear Springs On the Longitudinal Vibration of a Pipe String For Mining Manganese Nodules
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Paper presented at the The Fifth International Offshore and Polar Engineering Conference, June 11–16, 1995
Paper Number: ISOPE-I-95-047
... ABSTRACT: In order to reduce the longitudinal vibration of the pipe string for mining manganese nodules from deep sea bottoms, the effects of vibration absorbers with linear springs were studied in the previous reports, indicating that the resonance amplitude of the buffer attached...
Proceedings Papers
A Method For Semi-Active Control of the Longitudinal Vibration of a Pipe String For Mining Manganese Nodules
Available to Purchase
Paper presented at the The Fourth International Offshore and Polar Engineering Conference, April 10–15, 1994
Paper Number: ISOPE-I-94-042
... it is quite promised for the purpose sought, though a mechanism must be further developed for varying the spring constant of the absorber automatically according to the frequency of the ship's heave-motion. INTRODUCTION For mining manganese nodules from deep-sea bottoms, a pipe string is needed to connect...
Proceedings Papers
Vibration-Control of a Pipe String For Mining Manganese Nodules By the Shape of Buffer
Available to Purchase
Paper presented at the The Third International Offshore and Polar Engineering Conference, June 6–11, 1993
Paper Number: ISOPE-I-93-020
... Manganese Nodules by the Shape of Buffer K. Aso. K. Kun. H. Do/"i. T Ohkoshl und T Na/on Akita University Akita. Japan ABSTRACT In order to reduce the longitudinal vibration of pIpe string for mining manganese nodules by the pump- lift system, first, various buffers were designed to cause higher drag-forces...
