J.of Soc of Agri Struc, Japan.
Vol.32,No.2 September 2001, 79-84
Original:
Language: Japanese

    The experiment of simulation transport for the strawberry was carried out in the laboratory. Thirteen corrugated fiberboard boxes were filled with strawberries, and arranged in 13 layers. A random vertical vibration was applied on them through a vibration controller. The frequency and acceleration of random vibration were arranged from 5 to 100Hz, and 0 to 4.9 m/s², respectively.
    The analysis results were presented in time and power spectra. The time spectra show that the acceleration of strawberries in the bottom layer (1st layer) was greater than that of the top layers; the range is about +/- 5m/s². The power spectra show that the vibrations which occurred on the bottom layer have high peaks at the frequency 31 to 43 Hz, while almost no peaks appear on the middle and top layers at this frequency.
    The results indicate that the vibration transfer characteristics of strawberries decrease at the high frequency and increase at the low h.equency as load height increases.

Keywords: strawberry, simulation, transport, vibration, acceleration, power spectra

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