机械振动式红枣收获的动力学研究
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摘要
利用有限元分析软件对枣树模型机械振动机理进行动力学仿真分析。首先,对不同年限枣树建模三维模型并进行模态分析,结果显示不同生长年限枣树在第3、4阶模态时具有较为理想的模态响应,由此确定机械振动力传递分布较好的频率范围为12~20 Hz;其次,在模态响应分析基础上对枣树模型进行谐响应分析,结果显示3年生、5年生和8年生枣树所施加激振力的最佳激振频率分别为18、14、12 Hz。本研究可为机械振动式红枣收获机激振频率范围选择提供理论依据。
This study carries out the dynamic simulation analysis for the mechanism of mechanical vibration of jujube tree model by using finite element analysis software. Firstly,jujube trees model in different growth years are established by using three-dimensional modeling software,the results show that the 3 rd and 4 th-order modes of jujube trees in different growth years modal response is better,The good frequency range of mechanical vibration transmission distribution is12-20 Hz,Secondly,the harmonic analysis of the jujube tree model is analyzed basis on the modal analysis,and the results show that the optimal excitation frequency for excitation force of the 3,5,8 year-old jujube tree are 18,14 Hz and12 Hz. This study can provide vibration frequency range for mechanical vibrating jujube harvester.
This study carries out the dynamic simulation analysis for the mechanism of mechanical vibration of jujube tree model by using finite element analysis software. Firstly,jujube trees model in different growth years are established by using three-dimensional modeling software,the results show that the 3 rd and 4 th-order modes of jujube trees in different growth years modal response is better,The good frequency range of mechanical vibration transmission distribution is12-20 Hz,Secondly,the harmonic analysis of the jujube tree model is analyzed basis on the modal analysis,and the results show that the optimal excitation frequency for excitation force of the 3,5,8 year-old jujube tree are 18,14 Hz and12 Hz. This study can provide vibration frequency range for mechanical vibrating jujube harvester.
引文
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[5]彭俊,孙世鹏,傅隆生.机械振动式沙棘采收的动力学研究[J].农机化研究,2017,39(1):32-37.
[6]杜小强,倪柯楠,潘珂,等.可调振幅单向拽振式林果采收机构参数优化[J].农业工程学报,2014(16):25-32.
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[10]张最,肖宏儒,丁文芹,等.振动式枸杞采摘机理仿真分析与样机试验[J].农业工程学报,2015,31(10):20-28.
[11]吕梦璐,王春耀,罗建清,等.基于ANSYS对振动果树枝干“Y”型响应的研究[J].农机化研究,2017,39(2):37-41.
[12]刘梦飞.核桃采摘机的设计与试验[D]:西安:陕西科技大学,2015.
[13]吕建国,康士延.有限元分析自学手册[K].北京:人民邮电出版社,2013:169-209.
[14]吴道远.核桃树体建模及其果实采摘机设计[D].福州:福建农林大学,2017.
[15]何苗,坎杂,李成松,等.枸杞植株的动力学特性研究[J].农机化研究,2018,40(5):18-23.
[2]胡灿,鲁兵,侯书林,等.新疆红枣收获机械的研究现状与发展对策[J].中国农机化,2016(7):222-225,240.
[3]胡芸莎,白宝伟,王伟.新疆红枣产业发展现状与对策建议[J].新疆农机化,2016(6):21-24.
[4]陈度,杜小强,王书茂,等.振动式果品收获技术机理分析及研究进展[J].农业工程学报,2011(8):195-200.
[5]彭俊,孙世鹏,傅隆生.机械振动式沙棘采收的动力学研究[J].农机化研究,2017,39(1):32-37.
[6]杜小强,倪柯楠,潘珂,等.可调振幅单向拽振式林果采收机构参数优化[J].农业工程学报,2014(16):25-32.
[7]L Phillips-A,Hutchinson J R,Fridley R B.Formulation of forced vibrations of tree limbs with secondary branches[J].Transactions of the ASAE,1970,13(1):138-142.
[8]H bentaher,Haddar M.Finite elements modeling of olive tree mechanical harvesting using different shakers[J].Trees Structure and Function,2013,27(6):1537-1545.
[9]王冬,陈度,王书茂,等.基于有限元方法的整形果树振动收获机理分析[J].农业工程学报,2017,33(1):56-62.
[10]张最,肖宏儒,丁文芹,等.振动式枸杞采摘机理仿真分析与样机试验[J].农业工程学报,2015,31(10):20-28.
[11]吕梦璐,王春耀,罗建清,等.基于ANSYS对振动果树枝干“Y”型响应的研究[J].农机化研究,2017,39(2):37-41.
[12]刘梦飞.核桃采摘机的设计与试验[D]:西安:陕西科技大学,2015.
[13]吕建国,康士延.有限元分析自学手册[K].北京:人民邮电出版社,2013:169-209.
[14]吴道远.核桃树体建模及其果实采摘机设计[D].福州:福建农林大学,2017.
[15]何苗,坎杂,李成松,等.枸杞植株的动力学特性研究[J].农机化研究,2018,40(5):18-23.