| 乔伟豪,胡靖明,杨梅,闫会丽,张文洁,王清泽.大果沙棘籽和果渣的离散元仿真参数标定[J].干旱地区农业研究,2025,(3):287~298 |
| 大果沙棘籽和果渣的离散元仿真参数标定 |
| Calibration of discrete element simulation parameters for sea buckthorn seeds and pomace |
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| DOI：10.7606/j.issn.1000-7601.2025.03.29 |
| 中文关键词: 沙棘籽 果渣 堆积角 仿真试验 EDEM |
| 英文关键词:sea buckthorn seed pomace stacking angle simulation test EDEM |
| 基金项目:国家自然科学基金（52065006）；甘肃省科技计划资助项目（22YF7NA114） |
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| 中文摘要: |
| 为解决大果沙棘浆果打浆分离原汁后沙棘籽和果渣混合物的机械分离研究缺乏准确接触参数的问题，通过物理试验和仿真试验对大果沙棘籽和果渣的物性参数和接触参数进行标定。通过压缩试验标定了大果沙棘籽的本征参数；通过自由落体试验、斜面滑移试验、斜面滚动试验及仿真分析，得到大果沙棘籽与Q235钢板的碰撞恢复系数、静摩擦系数、滚动摩擦系数分别为0.550、0.449、0.039；通过最陡爬坡试验和Box-Behnken试验优化沙棘籽颗粒间的接触参数组合，通过仿真试验验证确定大果沙棘籽颗粒间的碰撞恢复系数、静摩擦系数、滚动摩擦系数分别为0.150、0.344、0.013；设计Plackett-Burman试验筛选出与果渣有关且对沙棘籽和果渣混合物料堆积角影响最显著的3个参数：果渣剪切模量、果渣-果渣静摩擦系数、果渣-果渣滚动摩擦系数，通过最陡爬坡试验确定3个参数的最佳取值范围，通过Central Composite试验建立二阶回归方程，对回归方程进行寻优求解得到3个显著参数的最优参数组合：果渣剪切模量1.57×106、果渣-果渣静摩擦系数0.303、果渣-果渣滚动摩擦系数0.145。最优参数组合经EDEM仿真验证得出仿真堆积角与实际堆积角的相对误差为2.78%。研究结果可为大果沙棘籽与果渣的分离研究提供相关依据。 |
| 英文摘要: |
| To address the issue of lacking accurate contact parameters in the mechanical separation of sea buckthorn seed and pomace mixtures after the beating of sea buckthorn berries to extract raw juice, the physical and contact parameters of the seeds and pomace were calibrated through both physical and simulation tests. The intrinsic parameters of sea buckthorn seeds were calibrated through physical tests. Using free fall, inclined plane slip, inclined plane rolling tests, and simulation analysis, the collision recovery coefficient, static friction coefficient, and rolling friction coefficient between the sea buckthorn seed and Q235 steel plate were determined to be 0.550, 0.449, and 0.039, respectively. Through the steepest climb test and Box-Behnken test, the contact parameter combination between sea buckthorn seed particles was optimized, and the collision recovery coefficient, static friction coefficient and rolling friction coefficient between sea buckthorn seed particles were determined by simulation test to be 0.150, 0.344, and 0.013, respectively. The Plackett-Burman test was designed to screen out three parameters related to fruit residue that had the most significant influence on the accumulation angle of the mixed materials of sea buckthorn seeds and fruit residue: Shear modulus of fruit slag, static friction coefficient of fruit slag and rolling friction coefficient of fruit slag were determined by the steepest climb test. The second\|order regression equation was established by the Central Composite test, and the optimal parameter combination of the three significant parameters was obtained by optimizing and solving the regression equation: the shear modulus of the slag was 1.57×106, the static friction coefficient between the slag and the slag was 0.303, and the rolling friction coefficient between the slag and the slag was 0.145. The relative error between the simulated stacking angle and the actual stacking angle was 2.78% through EDEM simulation. This study provides theoretical basis and model for the separation technology of sea buckthorn seeds and pomace. |
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