基于DEM的圆盘切割装置仿真及优化OA

To improve the working performance of the disc cutting device in a leek harvester and reduce the loss rate and missed cutting rate,this paper analyzes the cutting motion and force characteristics of the disc saw.It determines that during the contact phase,the frictional component must exceed the normal reaction component to ensure the smooth fall of the stems.The trajectory of the tooth tip during the cutting motion follows a cycloid.Through theoretical derivation,it concludes that the key influencing parameters are the operational speed of the machine,the rotational speed of the disc blade,and the cutting height.Building on this,combined with kinematics simulation,this paper constructs a quadratic polynomial regression model for the loss rate and missed cutting rate of the cutting platform,and then employs the Design-Expert software to complete the multi-factor optimization design.The experimental results indicate that when the machine operates at a speed of 0.4 m/s,the disc blade rotates at 3 016 r/min,and the cutting height is set to 43 mm,the header loss rate and the missed cutting rate decrease to 2.667%and 2.187%,respectively.Field test verification shows that the actual loss rate of the cutting platform is 2.85%,and the missed cutting loss rate is 2.35%,with relative errors of 6.9%and 7.5%compared to the optimized results,respectively.The optimized disc cutting device significantly improves the cutting performance.This study provides theoretical basis and technical support for the design and parameter selection of low-damage,high-efficiency leek harvesters.