| 摘要: |
| 针对CFD-DEM仿真过程中花生荚果与收获机械重要工作部件间的碰撞模型参数缺失问题,利用运动学方程原理设计了花生荚果恢复系数的测定装置,对花生荚果的弹性特性参数进行试验测定与分析。花生品种选用四粒红和白沙,采用L16(44×23)混合正交试验方案研究碰撞材料、下落高度、荚果质量、含水率、品种、材料厚度等因素对花生荚果恢复系数的影响。结果显示:影响花生荚果恢复系数的因素主次顺序为,碰撞材料、荚果质量、含水率、下落高度、材料厚度和花生品种,碰撞材料、荚果质量及含水率较为显著。花生荚果恢复系数随Q235、铝合金、有机玻璃、橡胶等材料依次减小,并随着荚果质量和含水率的增加而递减。碰撞材料为Q235(厚1 mm)、含水率为17.5%的白沙、下落高度为100 cm、荚果质量为1.3 g时恢复系数达到最大值为0.426 7;在相同条件下选用质量为2.5 g含水率为8.3%的荚果时恢复系数达到最大值0.390 9。该研究可为花生收获机械的参数设计及优化提供参考依据。 |
| 关键词: 花生 碰撞试验 恢复系数 弹性特性 |
| DOI：10.11841/j.issn.1007-4333.2016.08.15 |
| 投稿时间：2015-07-02 |
| 基金项目:中国农业科学院创新工程-土下果实收获机械创新项目;现代农业花生产业技术体系机械化装备岗位专项(CARS-14-机械化装备) |
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| Measurement and analysis of peanuts' restitution coefficient in point-to-plate collision mode |
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LU Yong-guang1,2, WU Nu1, WANG Bing2, YU Zhao-yang2, LIN De-zhi1,2, HU Zhi-chao2
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| (1.School of Mechanical Engineering, Nantong University, Nantong 226019, China;2.Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China) |
| Abstract: |
| In the view of lacking a collision model between peanuts and key parts of harvesting equipment and provide an important reference in parameter setting for CFD-EDEM simulation, a restitution coefficient measuring device based on kinematics was designed, and the restitution coefficient of peanut was measured and analyzed by experiment.Research on the collision materials, the thickness of collision materials, the mass of peanut, the moisture content of peanut, the falling height and the variety of peanut's effect on the restitution coefficient of the peanuts of Silihong and Baisha was conducted by a mixed orthogonal experiment based on the scheme of L16 (44×23).The results show that the most significant factor is the collision material, followed by the mass of peanut, the moisture content of peanut, the falling height and the thickness of collision material, and the variety of peanut is the most insignificant factor.Under the condition that the thickness of Q235 steel is 1 mm, the Baisha peanut's moisture content is 17.5%, the falling height is 100 cm, and the mass of peanut is 1.3 g, the value of restitution coefficient reaches the maximum which is 0.426 7.Under the same conditions except the mass of peanut is 2.5 g and the moisture content is 8.3%, the max value of restitution coefficient is 0.3909.This study provides important reference for designing and developing high performance peanuts harvesting equipment. |
| Key words: peanut collision test restitution coefficient elasticity |
