Abstract

To improve the pistachio harvesting rate, the force in the process of the harvest is analyzed, and it is found that the major factors affecting fruit vibration shedding are excitation force-frequency, amplitude and clamping height. The effective range of the vibration frequency is obtained through modal analysis. The rigid-flexible coupling model of the vibration device and tree reveals the response characteristics of the combination point of fruit. The optimal vibration parameters are force amplitude 3000 N, vibration frequency 18 Hz and clamping height 700 mm. After the optimization, the number of fruit trees reaching more than 90% harvest rate increase by 1.46 times.

摘要

为提高开心果的采收率，对采收过程中的受力进行了分析，发现影响果实振动脱落的主要因素是激振力频率、振幅和夹持高度。通过模态分析得到振动频率的有效范围。振动装置与树木的刚柔耦合模型揭示了果实结合点的响应特性。最佳振动参数为力幅 3000 N、振动频率 18 Hz 和夹紧高度 700 mm。优化后，达到90%以上采收率的果树数量增加了1.46倍。