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櫻桃番茄運輸包裝件振動沖擊性能試驗
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“十一五”國家科技支撐計劃資助項目(2006BAD05A05、2007BAD35B0103)和天津市科技支撐計劃重點資助項目(09ZCGYNC00900)


Vibration and Impact Performance Tests of Cherry Tomato Transport Packages
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    摘要:

    針對目前櫻桃番茄儲運過程中主要包裝形式以及造成破損的情況,選擇典型運輸包裝件,進行了正弦掃頻、堆碼強度、堆碼掃頻振動傳遞性能、垂直沖擊和跌落試驗。通過對單件包裝件的掃頻振動試驗,測出單件的固有頻率為26.61Hz;通過堆碼強度試驗,測出了包裝件的最大堆碼層數(shù)為9層。通過9層堆碼掃頻振動傳遞性能試驗確定了底層、中間層和頂層包裝件的固有頻率分別為36.61、10.76和6.44Hz,得到了各層包裝件振動加速度、振動傳遞率隨時間的變化曲線,并探討了固有頻率和振動傳遞率峰值與堆碼高度之間的關(guān)系。在此基礎(chǔ)上,通過垂直沖擊試驗,測出了產(chǎn)品的脆值為89.58;通過跌落試驗,測出了包裝件最大允許跌落高度為580mm。

    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.

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張連文,楊傳民,王勇,潘道津,孟憲文,佟瞳.櫻桃番茄運輸包裝件振動沖擊性能試驗[J].農(nóng)業(yè)機械學(xué)報,2011,42(3):125-130,155. Zhang Lianwen, Yang Chuanmin, Wang Yong, Pan Daojin, Meng Xianwen, Tong Tong. Vibration and Impact Performance Tests of Cherry Tomato Transport Packages[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(3):125-130,155.

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