基于MBD-DEM的胡麻喷药机越障性能仿真分析
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摘要
为探究四轮自走式胡麻喷药机越障性能,采用多体动力学(MBD)和离散元(DEM)耦合法对其进行仿真,分析机身质心位移及速度变化、前轮速度及加速度变化过程。结果表明:在越障过程中机身运行平稳,最大行走速度0.45 m/s,最小速度为0.05 m/s;左、右前轮在单独驱动马达提供动力时受颗粒床体影响会产生行走速度差,最大为0.08 m/s。行驶过程中左右前轮加速度数值保持一致,但加速度曲线比速度曲线变化更剧烈。
In order to explore the obstacle-crossing performance of four-wheel self-propelled flax sprayer, multi-body dynamics(MBD) and discrete element method(DEM) were used to simulate the machine. The displacement and velocity change of the centroid of machine, the velocity and acceleration change of the front wheel were analyzed, respectively. The results showed that the centroid of machine ran stably in the process of obstacle-crossing, with the maximum walking speed of 0.45 m/s and the minimum speed of 0.05 m/s. When the left and right front wheels are powered by the separate driving motor, they will be affected by the particle bed body, resulting in a difference in walking speed, up to 0.08 m/s. During driving, the acceleration values of the left and right front wheels were consistent, but the acceleration changed more sharply than the speed curve.
In order to explore the obstacle-crossing performance of four-wheel self-propelled flax sprayer, multi-body dynamics(MBD) and discrete element method(DEM) were used to simulate the machine. The displacement and velocity change of the centroid of machine, the velocity and acceleration change of the front wheel were analyzed, respectively. The results showed that the centroid of machine ran stably in the process of obstacle-crossing, with the maximum walking speed of 0.45 m/s and the minimum speed of 0.05 m/s. When the left and right front wheels are powered by the separate driving motor, they will be affected by the particle bed body, resulting in a difference in walking speed, up to 0.08 m/s. During driving, the acceleration values of the left and right front wheels were consistent, but the acceleration changed more sharply than the speed curve.
引文
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[4] 邵忠.亚麻派斯莫病及其综合防治技术[J].农业科技通讯,2016(6):240-242.
[5] 赵常,耿爱军,张姬,等.水肥药精准管理技术研究现状与发展趋势[J].中国农机化学报,2018,39(11):28-33.Zhao Chang,Geng Aijun,Zhang Ji,et al.Research status and development trend of precision management technology of water and fertilizer [J].Journal of Chinese Agricultural Mechanization,2018,39(11):28-33.
[6] 李斌,朱荣光,李亚雄,等.3WPZ-1600型玉米高架自走式喷药机的研制[J].中国农机化学报,2015,36(6):108-111.Li Bin,Zhu Rongguang,Li Yaxiong,et al.Research on 3WPZ-1600 type elevated self-propelled spraying machine for corn [J].Journal of Chinese Agricultural Mechanization,2015,36(6):108-111.
[7] 王佳文.智能喷药机关键部件设计与研究[D].淄博:山东理工大学,2016.
[8] 沈仙法,周宏平,许林云.高射程履带喷雾车偏驶仿真与试验[J].中国农机化学报,2015,36(6):100-103,111.Shen Xianfa,Zhou Hongping,Xu Linyun,et al.Simulation and experiment on straight deviation of tracked spraying vehicle for high range [J].Journal of Chinese Agricultural Mechanization,2015,36(6):100-103,111.
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[10] 宋学锋,戴飞,张锋伟,等.90°弯管内玉米颗粒气固耦合运动特性分析[J].中国农机化学报,2018,39(11):67-71.Song Xuefeng,Dai Fei,Zhang Fengwei,et al.Analysis of corn granular movement characteristics in 90° elbow based on gas-solid coupling method [J].Journal of Chinese Agricultural Mechanization,2018,39(11):67-71.