运输过程中机械振动对果蔬贮藏品质的影响

发布时间：2018-07-04 20:16

  本文选题：振动 + 频率　； 参考：《天津商业大学》2016年硕士论文

【摘要】：目前,减少果蔬采后损耗这一课题正在引起越来越多人的关注。在流通过程中,果蔬往往会承受静载、振动、挤压、跌落冲击等诸多载荷形式的作用,这些都会导致果蔬机械损伤的产生,而机械损伤也正是造成果蔬采后损耗的主要因素之一。因此,本文根据运输过程中实际情况,研究了运输过程中振动冲击和振动载荷对猕猴桃和西红柿贮藏品质的影响。主要从以下几点进行了研究:1)跌落冲击对猕猴桃贮藏品质的影响:在跌落试验台上,通过逐渐升高跌落高度观察不同跌落高度对猕猴桃包装件的影响程度,直到包装件出现明显的损伤,然后在不同的温度下对猕猴桃果实进行贮藏,观察其果实硬度、可溶性固形物含量、可滴定酸含量和丙二醛含量等品质随贮藏时间的变化过程。2)运输过程中机械振动频率对猕猴桃和西红柿贮藏品质的影响:在振动实验台上,模拟运输过程中的机械振动情况。将猕猴桃和西红柿的包装件分别置于振动试验台上进行定频实验,将试验后的两种果实置于0℃的冷库中贮藏,研究机械振动对猕猴桃和西红柿果实贮藏品质的影响。3)运输过程中机械振动加速度对猕猴桃和番茄贮藏品质的影响:在运输过程中,由于运输工况以及果蔬包装件所处位置的不同,各包装件在相同振动频率下所承受的振动加速度也是不相同的。在10Hz振动频率下,分别对相同的猕猴桃包装和番茄包装件进行加速度为2.5m/s2、5m/s2以及7.5m/s2的振动实验,研究经历了不同加速度下运输过程的果蔬果实贮藏品质的变化情况。4)机械振动对不同堆码高度猕猴桃贮藏品质的影响:在实验过程中,进行猕猴桃的振动堆码实验,将猕猴桃包装件进行堆码,设定振动频率10Hz,将实验后不同层数的猕猴桃果实置于三种不同温度的冷库中进行贮藏,探究机械振动对不同堆码高度处上猕猴桃贮藏品质的影响。
[Abstract]:At present, the issue of reducing postharvest loss of fruits and vegetables is attracting more and more attention. In the process of circulation, fruits and vegetables are often subjected to static load, vibration, extrusion, drop impact and many other forms of load, which will lead to fruit and vegetable mechanical damage. Mechanical damage is also one of the main factors causing postharvest loss of fruits and vegetables. Therefore, the effects of vibration shock and vibration load on the storage quality of kiwifruit and tomato were studied according to the actual conditions during transportation. The effects of drop impact on the storage quality of kiwifruit were studied from the following aspects: on the drop test bench, the effects of different drop heights on kiwifruit packaging were observed by increasing the drop height gradually. Then the kiwifruit was stored at different temperatures to observe its firmness and soluble solids content. Effect of mechanical vibration frequency on storage quality of kiwifruit and tomato during transport: on vibration test bench, mechanical vibration during transportation was simulated. The packaging of kiwifruit and tomato were placed on the vibration test bench to carry on the frequency constant experiment separately, the two kinds of fruits after the test were stored in the cold storage at 0 鈩，

本文编号：2097292