# 랜덤 진동에 의한 포장화물 및 포장된 사과의 진동특성

• Published : 2008.02.25
• 61 19

#### Abstract

Shock and vibration inputs are transmitted from the transporting vehicle through the packaging box to the fruit. The vibration causes sustained bouncing of fruits against each other and the container wall. The steady state vibration input may cause serous fruit injury, and the damage is particularly severe if the fruits are bounced at its resonance frequency. The determination of the resonance frequencies of the fruits and vegetables may help the packaging designer to design the proper packaging system providing adequate protection of the fruits from external impact or shock. In this study, to analyze the vibration properties of the apples for optimum packaging design during transportation, the random vibration tests were carried out. From the results of random vibration test, the resonance frequency and power spectral density (PSD) of the packaged freight of apples in the test were in the range of 82 to 97 Hz and 0.0013 to 0.0021 $G^2/Hz$ respectively and the resonance frequency and PSD of the packaged apples were in the range of 13 to 71 Hz and 0.0143 to 0.0923 $G^2/Hz$ respectively.

#### Keywords

Resonance frequency;Power spectral density (PSD);Random vibration;Packaged freight;Apples

#### References

1. Hinsch, R. T., D. C. Slaughter, W. L. Craig and J. F. Thompson. 1993. Vibration of fresh fruits and vegetables during refrigerated truck transport. Transactions of ASAE 36(4):1039-1042 https://doi.org/10.13031/2013.28431
2. Peleg, K. and S. Hinga. 1986. Simulation of vibration damage in produce transportation. Transactions of the ASAE 29(2): 633-641 https://doi.org/10.13031/2013.30204
3. 한국공업규격표준협회. 수송 포장 화물과 단위 화물의 수직 랜 덤진동 시험 방법. KS A ISO 13355
4. Singh, J., S. P. Singh and E. Joneson. 2006. Measurement and analysis of US truck vibration for Leafspring and air ride suspensions, and development of tests to simulate these conditions. Packaging Technology and Science (in press). DOI:10.1002/pts.732
5. ASTM D4728. Standard Test Method for Random Vibration Testing of Shipping Containers
6. Kim, G. S. 2007. Vibration Behavior of the Fruits and the Packaged Freight and their Quality Changes at Simulated Transportation Environment. Chungnam National University Doctor Thesis