粉垄刀具减振仿真研究

Simulation Study on Vibration Reduction of Powder Ridge Cutting Tool

针对现有粉垄刀具作业时振动大的问题,开展了粉垄刀具减振仿真研究。首先,采用SPH法建立粉垄刀具作业系统动力学仿真模型;然后,采用粉垄耕作田间试验,验证建模方法的合理性;最后,利用构建的粉垄刀具作业系统模型开展粉垄作业仿真,研究粉垄刀具的受力变化,揭示现粉垄刀具作业时振动大的原因。开展粉垄刀具结构创新设计,对新型粉垄刀具的减振效果进行仿真分析,结果表明:基于SPH法的粉垄刀具作业系统建模方法合理,可用于粉垄刀具作业分析;粉垄刀具的螺旋叶片和刀片在高度平面上不具对称性,不同深度土壤的参数存在差异、约束作用不一,其切土阻力和扭矩呈周期性变化,且激振力力幅大,达到713.5N,是粉垄刀具作业时振动大的原因。新结构的双螺旋粉垄刀具作业时,其力幅和力矩幅分别比原粉垄刀具的减小78%和52.8%,能有效减小粉垄刀具的振动。

In order to solve the problem of high vibration in the operation of existing ridge-cutting tools, a simulation study was carried out to reduce the vibration of ridge-cutting tools. In this paper, first using the SPH method powder ridge tool operating system dynamics simulation model is set up, after the powder ridge cultivation field experiment, verify the rationality of the modeling method, and finally using powder ridge tool operation system model of building, the powder ridge operation simulation, study the stress of the powder ridge tool change, reveals the powder ridge tool vibration reasons, when working at the same time, the innovation of powder ridge tool structure design, and the damping effect of new type of powder ridge tool for simulation analysis. The results show that the modeling method based on SPH is reasonable and can be used to analyze the cutting tool operation. In addition, the parameters of soil at different depths are different, and the constraint effect is different. The soil cutting resistance and torque change periodically, and the vibration force amplitude is large, reaching 713.5 N. The force amplitude and torque amplitude of the new double helix ridge-cutting tools are reduced by 78% and 52.8% respectively compared with the original ridge-cutting tools, which can effectively reduce the vibration of the small ridge-cutting tools.