摘要
切割器作为芦蒿收获机的重要工作部件,其切割性能直接影响作物的收获质量和后续输送效果。采用虚拟样机设计方法,对自走式芦蒿有序收获机中往复式切割器的结构参数和芦蒿茎秆的物理参数进行研究,建立了切割部件的三维实体模型和茎秆的柔性简化模型,并进行刚柔耦合动力学仿真分析。以切割系统的切割速度vg、切割角度α和前进速度vm为影响因素,选取切割器对茎秆切割力F和重割率γ为评价指标,设计了三因素三水平虚拟正交试验,运用统计学软件进行响应面回归分析和方差分析,并进行田间试验验证。结果表明,响应面模型(RSM)优化组合vg=1.6 m/s,α=15°,vm=1.0 m/s时,F、γ明显降低,割茬质量最好,与试验结果相比,切割力误差小于10.9%、重割率误差小于11.3%。分析结果验证了预测模型的有效性和准确性,表明所设计的往复式切割器满足对芦蒿的有序收获要求。
As one of the most important working components of harvester,the cutting performance of cutter directly affects the quality of crops harvest and the subsequent transportation effectiveness. The reciprocating cutter structural parameters of the self-designed Artemisia selengensis orderly harvester and the physical parameters of Artemisia selengensis were studied,the three-dimensional entity model of cutter and flexible simplified model of crop stem were built by software Pro / E,and the coupled dynamics simulation analysis was proceeded through dynamic analysis software ADAMS according to the parameters acquired. The cutting speed vg,cutting angle α and working speed vmof the cutting system were selected as factors,the cutting force F and recutting ratio γ were selected as evaluating indicators to design a virtual orthogonal experiment with three factors and three levels. The response surface methodology（ RSM） regression analysis and variance analysis were applied to analyze the results,and compared with the test results of field experiment. The results showed that RSM optimum combination was vg= 1. 6 m / s,α = 15°,vm= 1. 0 m / s, cutting force F and recutting ratio γ were effectively reduced with this combination,the comparison results showed that the cutting force error was less than 10. 9% and the recutting ratio error was 11. 3%,indicating the effectiveness of the simulation analysis and regression forecasting model. The study illustrated that the reciprocating cutter designed could satisfy the demands of Artemisia selengensis orderly harvest,and had a certain reference value.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2017年第2期110-116,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
江苏省农机三新工程项目(NJ2014-08)
江苏省科技支撑项目(BE2015334)
江苏省农业科技自主创新资金项目(CX(15)1033)
关键词
芦蒿
有序收获机
往复式切割器
虚拟样机
动力学仿真
Artemisia selengensis
orderly harvester
reciprocating cutter
virtual prototype
dynamic simulation
