基于Solidworks建模及有限元分析的核桃收获机的仿真设计

Simulation design of walnut harvester based on Solidworks modeling and finite element analysis

运用Solidworks建模,设计了一种核桃振动收获机,主要由夹持装置、激振装置及机架组成,通过激振器中偏心块运转产生的激振力作用于核桃树干上,侧枝上核桃被迫振动,产生大于果柄力的拉力,使果柄断裂、果实脱落。用UG对核桃树进行三维建模,导入Workbench进行模态分析,得到核桃树最适激振频率为15.41 Hz,夹持装置夹紧力为3.185 kN。对激振装置中偏心块进行参数设计,通过有限元分析,得偏心块固有频率为1 626.1~5 072.6Hz;对偏心块结构静力进行分析,其形变为0.022 mm,应变为55.12 MPa,偏心块结构稳定,可满足设计要求。

A walnut vibrating harvester was designed based on Solidworks for 3D modeling,which is mainly composed of the clamping device,the exciting device and the frame.The eccentric block running in the shaker generates the exciting force,which acts on the trunk of the walnut to vibrate the walnut on the side branch.When the pulling force greater than the stem force,the fruit stem could be break to cause the fruit to fall off.The 3D model of the walnut tree was set up by using UG and was imported into workbench for modal analysis.The optimum excitation frequency was obtained at 15.41 Hz with the clamping force of 3.185 kN.The eccentric block was designed and its natural frequency was revealed to be 1626.1-5072.6 Hz by finite element analysis.The static analysis of the eccentric block structure shows that the deformation is 0.022 mm and the strain is 55.12 MPa.The structure of the eccentric block is stable,which meets the design requirements.