No.7（2012）18.Development of a random vibration test method able to simulate sea freight vibrations

Takeshi Konishi, Yujiro Abo

  Many consumers who live in Tokyo receive their daily commodities via physical distribution. Many truck lines are used in the metropolitan area. However, in order to assess the status of the packaging of packed goods in the case of freight cars, there is a method, the random vibration test, which accurately reproduces vibrations during transportation, yet this is unavailable for shipping. In this research, vibration data was obtained from containers being transported on the Ogasawaramaru, a passenger ferry between Tokyo and the Bonin Islands, and then random vibration test conditions were created. Peak accelerations of 8.5 Hz and 13 Hz were obtained from the vibration test conditions derived from these results. Furthermore, the reappearance of vibrations created under random vibration test conditions were verified to be possible with the vibration tester.

Keywords
Vibration, Vessel, Fast Fourier Transform, Ogasawara

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