The Numerical Simulation Analysis of Pinus sylvestris var. Mongolica seeds Vibration Situation Based on EDEM

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Miao, Zhenkun^1 ; Li, Zhiru^1 ; Xu, Kesheng^1 ; Wu, Liguo^1 ; Su, Ning^1 ; Song, Guanghui^2 ; Liu, Yalong^2

Harbin Research Institute of Forestry Machinery, State Forestry Administration, Harbin

150086, China^1

Gtr. Khingan Forestry Group Corporation Technical Promotion Station of Forest Management Department, Jiagedaqi

165000, China^2

关键词: Air suction;    Fundamental principles;    Numerical simulation analysis;    Pinus sylvestris;    Seeding effects;    Sliding contacts;    Suction effects;    Vibration frequency;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/5/052111/pdf
DOI  :  10.1088/1755-1315/252/5/052111

来源: IOP

【 摘 要 】

The vibrate situation of air-suction type of precision seeder tray have significant influence for seeding effect. So the fundamental principles based on discrete element method was used to simulate the population distribution of Pinus sylvestris var. mongolica seeds in vibration tray by Hertz-Mindlin no sliding contact model of EDEM. Analyzed the influence of vibration frequency, the amplitude of vibration to the seeds population distribution. Divided the simulation region into several tiers along the direction perpendicular to the bottom of the tray, have the distribution of seeds population in different simulation tiers. Study the distribute situation in different parameters got the conclusion that: when frequency was 20Hz, the amplitude of vibration was 5mm, the distribution of seeds population was the most ideal and seeds suction effect was the best; The orientation where 5∼15mm from the bottom of the seeds tray was the optimum for seeds suction, can be chosen for efficient seeds suction region.