【摘要】 为探寻水果卡车运输的振动及损伤 ,通过模拟 3自由度振动试验 ,研究了梨塑料箱盛装时包装箱在各方向振动的加速度传递率 ,分析了振动频率对梨损伤的影响 ,探讨了梨在一定频率下振动至失去商品性时的振动次数与振动积累加速度的关系。试验结果表明 ,在一定振动频率范围内 ,越是上层塑料箱 ,其在各方向振动的加速度传递率越大 ,顶层塑料箱在左右、前后方向振动的加速度传递率远大于上下方向的 ;在相同加速度条件下 ,振动频率越小梨越容易产生损伤 ;在确定的振动频率下 ,梨振动至失去商品性时的振动次数 N ,与振动积累加速度g0 存在一定的对应关系。更多还原

【Abstract】 To study the fruit vibration and bruise in their truck transport, by simulative three-degree-of-freedom vibration test, the vibrating acceleration transmissibility of plastic boxes packaging pears in every direction was studied; the effects of vibration frequency on pear bruise were analyzed; the relationship between vibrating times and vibrating accumulated acceleration were discussed when pears lost their marketability at a certain vibration frequency. The results showed: at a certain vibration frequency, the upper plastic boxes have, bigger transmissibility of vibration acceleration in every direction; vibration acceleration transmissibilities of top level plastic boxes in right-and-left direction and in front-and-back direction were far larger than that in up-and-down direction; under the same acceleration, the smaller the vibration frequency was, the more easily pear bruised. There was a certain relationship between vibration times N and its accumulated acceleration g₀ as pears lost their marketability at a definite frequency.更多还原