Vibration and Impact Performance Tests of Cherry Tomato Transport Packages

Abstract:

In view of the main packing form and damage of cherry tomatoes in storage and transportation process in nowadays, the main reasons for the damage of cherry tomatoes package were studied. By choosing a kind of typical cherry tomato packages in the circulation market, five real tests, which included sinusoidal vibration test at variable frequency, vertical impact and dropping tests as well as stacking strength test and vibration transmissibility of multipackages stacking test, were carried out according to the national test standards. Through sinusoidal vibration test at variable frequency on the single layer package and stacking strength test, the resonance frequency and maximal stacking layers were determined respectively: the natural frequency of a single package was 26.61Hz and the maximal stacking layer was 9. Then, the natural frequencies of every layer package were determined by 9 stacking layers vibration transmissibility experiment at variable frequency, and they were 36.61, 10.76 and 6.44Hz for the bottom, middle and top layers respectively. Curves of acceleration and vibration transmissibility of every layer package vs time were obtained. The relationships of its natural frequency and peak value of vibration transmissibility vs stack height were discussed. On the basis of the above, the fragility of each package was 89.58 by carrying out the vertical impact test. Also, the allowable maximal dropping height is 580mm according to the dropping test. Finally, the protection capability of the packages on cherry tomatoes was evaluated and some suggestions were also given.