Authors

Abstract

To analyze the maximum acceleration (amax) of a potato colliding with different objects, both experimental test and finite element analysis (FEA) methods were used. Results showed that when potatoes were collided with the single rod, the steel plate and the double rods, the average discrepancies of FEA and experimental test values were 5.3%, 3.95% and 5.04%. The maximum acceleration increased with the increase of potato drop height, and decreased with the increase of potato mass. Under the same conditions, the maximum acceleration decreased in turn when the potatoes were collided with the steel plate, the single rod and the double rods. The FEA results showed that the maximum acceleration in collision with the steel plate was 60.78% to 96.29% higher than that with the double rods. The maximum acceleration in collision with the steel plate was 53.89% to 83.27% higher than that with the double rods. The maximum acceleration in collision with the single rod covered with soil was 37.65% and 31.54% lower than that without soil. The research methods and conclusions of this article provided a basis for the analysis of impact mechanics and damage mechanism of potatoes, and contributed to further researches related to solid-like agricultural and food products.

Abstract in Chinese

为了分析马铃薯与不同对象碰撞的最大加速度，分别采用试验测试和有限元分析方法进行研究。结果表明：马铃薯分别与单杆条，钢板和双杆条碰撞时，有限元分析和试验结果的差别分别为5.3%，3.95%和5.04%。马铃薯最大碰撞加速度随碰撞高度增加而变大，随马铃薯质量增大而减小。碰撞条件相同时，马铃薯与钢板、单杆条和双杆条碰撞的最大加速度依次减小。马铃薯与钢板碰撞的最大加速度比与双杆条碰撞时高60.78%到96.29%，比与单杆条碰撞时高53.89%到83.27%。马铃薯从不同高度或者以不同质量分别与单杆条碰撞时，有土壤条件下最大碰撞加速度比无土壤条件下分别减小37.65%和31.54%。本文的研究方法和结论为马铃薯碰撞分析和损伤机理研究提供了基础，为类似的固体农业物料和食品研究提供了参考。