谷子联合收获机割台机架的振动分析与结构优化  

Vibration Analysis and Structural Optimization of Header Frame of Millet Combine Harvester

作　　者：郑国强 李耀明[1] 姬魁洲 梁振伟 马啸 程军辉 Zheng Guoqiang;Li Yaoming;Ji Kuizhou;Liang Zhenwei;Ma Xiao;Cheng Junhui(College of Agricultural Engineering,Jiangsu University,Zhenjiang 212013,China;Shandong Academy of Agricultural Machinery Science,Jinan 250100,China)

机构地区：[1]江苏大学农业工程学院,江苏镇江212013 [2]山东省农业机械科学研究院,济南250100

出　　处：《农机化研究》2024年第1期41-45,53,共6页Journal of Agricultural Mechanization Research

基　　金：山东省重大科技创新工程项目(2019JZZYO10729);江苏省科协青年科技人才托举工程项目(2020-21);镇江市重点研发计划(现代农业)项目(NY2021009)。

摘　　要：为了降低谷子联合收获机在田间工作时的振动、减少割台损失率,利用SolidWorks对谷子割台机架进行三维建模,利用ANSYS软件对谷子割台机架优化前和优化后分别进行有限元分析,并用东华DH5902动态测试分析仪对计算机模态分析结果进行了验证。结果表明:优化前的第4阶模态为11.04Hz,其频率落在外部激振频率范围内;优化后的谷子割台机架各个阶次频率均避开了联合收获机各外部激振频率范围,有效避免了割台震动的产生。通过田间试验验证了改进前后的割台损失率,改进后的割台损失率降低了14.5%。研究成果可为降低谷子联合收获机振动及为谷子割台的减震设计提供了理论指导。In order to reduce the vibration of millet combine harvester when working in the field and reduce the loss rate of header,this paper uses SolidWorks to carry out three-dimensional modeling of millet header frame,carries out finite element analysis before and after optimization with ANSYS software,and verifies the computer modal analysis results with Donghua DH5902 dynamic test analyzer.The fourth order mode before optimization is 11.04Hz,and its frequency falls within the external excitation frequency range.Each order frequency of the optimized millet header frame avoids the external excitation frequency range of the combine harvester,effectively avoiding the generation of header vibration.The field experiment verifies the header loss rate before and after the improvement.The results show that the header loss rate after the improvement is reduced by 14.5%.The research results of this paper provide theoretical guidance for reducing the vibration of millet combine harvester and the damping design of millet header.

关 键 词：割台机架 有限元分析 模态分析 结构优化 谷子 

分 类 号：S225[农业科学—农业机械化工程] S220.3[农业科学—农业工程]