磁気コンパス装備位置付近における船体の振動測定結果

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タイトル別名
  • Study on the Vibration around Ship's Magnetic Compasses
  • ジキ コンパス ソウビ イチ フキン ニ オケル センタイ ノ シンドウ ソク

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This paper describes the measurement of vibration around the ship's magnettic compasses equipped on training ships of which gross tonnage is around 20 to 1850 tons. The vibration estimation was done with the measured values from three acceleration sensors attatched on the ship's deck near the compass binnacle stand, on the binnacle and on the bowl in three axes perpendicular with each other as up and down, fore and aft and athwartships while the ships were in full speed and slow speed. As the results, Fig.8 to 11 are showing the vibration amplitudes measured on the compass bowls of four sampled ships in relation to the frequency. We can clearly see the difference of vibration in two ships' speeds of full and slow, a few peaks of vibration on the graphs, and each amplitude in μm. These results would provide a group of the data of ship's vibration around the magnetic compass binnacle. Much data in future as these values would be useful to design and test the magnetic compasses for use at sea.

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