温室三七收获机有限元分析

Finite Element Analysis of Greenhouse Notoginseng Harvester

根据三七种植新农艺的要求,设计了一款应用于温室种植模式的三七收获机。为提高其工作性能,利用ANSYS有限元软件进行有限元分析,获取在静载荷作用应力、变形的大小及分布情况。结果表明:应力集中发生在电机安装位置及车架纵梁连接处,最大变形发生在车尾处,机架强度符合要求。对机架进行模态分析,获得其固有频率并进行谐响应分析,分析可知:在频率15Hz时电机安装位置处可能发生共振,此时电机安装位置处应力和位移达到最大,最大应力为4.34MPa,最大位移为2.03mm,机架满足激励载荷下的强度要求。对挖掘铲进行静力学分析,得到挖掘阻力5 000N,挖掘铲最大变形量为1.334 4mm,最大应力为20.894MPa。本文为后续温室三七收获机的减振以及机架、挖掘铲优化提供了理论依据。

According to the requirements of new agronomic design in the greenhouse,we design a new notoginseng harvester. In order to improve its performance,we use ANSYS for the finite element analysis,to obtain the stress and deformation under static loading and distribution. The results show that the stress concentration occurs at the position of motor installation,the connection of the frame longitudinal beam,the maximum deformation occurs at the end of the car,and the frame strength meets the requirements. Modal analysis was carried out on the Frame,and natural frequencies and harmonic response analysis is carried out,on the frequency of 15 Hz,resonance may occur at the placa motor installed,the machine installation location of maximum stress and displacement,maximum stress is 4. 34 MPa,the maximal displacement of 2. 03 mm. The frame satisfies the strength requirement under the excitation load. The static analysis of the excavating shovel was carried out,and the maximum deformation of the excavated shovel was 1.3344 mm and the maximum stress was 20.894 MPa. This paper provides a theoretical basis for the vibration reduction and the optimization of the frame and excavating shovel.