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基于ADAMS的宽窄行分插机构动力学分析论文[带图纸].pdf

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基于ADAMS的宽窄行分插机构动力学分析论文[带图纸].pdf

摘要宽窄行插秧是由农艺专家提出的一种适合我国水稻种植要求的种植方式,该种植方式的目标是增加通风,减少病虫害,增加水稻产量。目前国内插秧机用分插机构都是等行距30cm形式,延吉插秧机制造有限公司和黑龙江农业机械研究所研制了一种宽窄行插机,采用等行距插秧用的曲柄摇杆式分插机构,只是在分插机构和秧箱的布置上做了一定的改进。实现了20cm40cm的插秧行距,但秧箱未能有效利用,尤其是采用20cm秧盘,与现有30cm秧盘不通用,机器不成熟,限制了机器的推广。另外,浙江理工大学赵匀等提出了多种行星轮系宽窄行分插机构,并进行了机构运动学的分析和参数优化。宽窄行分插机构是宽窄行水稻插秧机的关键工作部件,其性能的优劣将直接影响水稻插秧质量、插秧机工作可靠性、使用寿命和插秧效率,直接决定插秧机的整体工作性能和品牌竞争力。因此,对宽窄行水稻插秧机分插机构进行运动学、动力学、强度方面的分析、研究,具有重大的现实意义和经济效益,对高速插秧机的发展,宽窄行分插机构的研制以及我国水稻种植机械化水平的提高具有重要的理论意义,同时还给零件的刚柔耦合分析提供了一种实现方法。本课题以水稻插秧机宽窄行分插机构为研究对象,首先分析了分插机构在高速和低速运动下机座的受力变化情况,讨论了在多高的转速下需要考虑分插机构的不平衡现象,并通过在机构上增加配重来优化高速下机座受力变化幅度其次将分插机构栽植臂壳体看作柔性体,对其在水稻插秧机分插机构工作过程中受到的应力、应变、位移进行了分析、研究,主要内容如下1实现UG与ADAMS的数据转换,实现虚拟样机的仿真2分析不同转速下机座受力3在ADAMS中进行动平衡研究4实现UG与ANSYS的数据转换,在ANSYS中生成取苗臂壳体中性文件5实现ADAMS与ANSYS的数据转换,在ADAMS中实现分插机构的刚柔耦合模型并进行仿真分析6仿真载荷文件的提取及在ANSYS环境下的取苗臂壳体强度分析关键词宽窄行分插机构动平衡柔性体ANSYSADAMSAbstractWidenarrowdistanceplantingisputforwardbyagriculturalexpertsandisacultivationmodesuitabletoChinasriceplantingrequirements,thegoalofthiscroppingsystemistoincreaseventilation,reduceplantdiseasesandinsectpests,increasetheyieldofrice.Atpresent,domestictransplanterwithmechanismarespaced30cm,yanjitransplantermanufacturingcommpanyandHeiLongJiangagriculturalmachineryhavedevelopedawidenarrowdistancetransplatingmachine,adoptingwidenarrowdistanceplantingwiththecrankrockermechanism,justdoacertainimprovementonthemechanismandtheseedlingboxslayout.Acheivetheplantingspaceof20cm40cm,buttheseedlingboxfailstouseeffectively,especiallyusing20cmseedlingbox,whichisnotgeneralusingwiththeexisting30cmseedlingbox.Becausemachineisnotmature,soitlimitthepromotionofthemachine.Inaddition,ZhaoYunofZheJiangSci_TechUniversityputforwardavarietyoftransplantingmechanismwithplanetarygeartrainspacing,andtheanalysisofkinematicsandparameteroptimization.Widenarrowdistancetransplatingmechanismisthekeyparttothespacingofricetransplanterworkingparts,itsqualityperformancewilldirectlyaffectthequalityofriceseedlingtransplanter,workreliability,servicelifeandplantingefficiency,theoverallworkperformanceanddeterminetransplantersbrandcompetitiveness.Therefore,thekinematics,dynamics,strengthanalysisandresearchforspacingricetransplantermechanismhasthesignificantpracticalsignificanceandeconomicbenefits,forthedevelopmentofhighspeedricetransplanterandthatthedevelopmentandtheimprovementofriceplantingmechanizationwidenarrowdistancetransplatingmechanisminourcountryhasimportanttheoreticalsignificance,italsoprovidesanimplementationmethodaboutthecoupledanalysisofpart.Thisreaserchobjectisaboutthericetransplanterwidenarrowdistancetransplatingmechanism,firstlyanalyzesthestressofmechanismonhighspeedandlowspeedmovementchanges,discussesinhowhighspeedweneedtoconsiderthemechanismimbalance,andoptimizationthevariationsinforcethroughtoaddweighttothemechanismSecondregardtheplantingarmshellasflexiblebody,analysisandreaserchthestress,strainanddisplacementofricetransplantermechanismintheprocessofworking,themaincontentlistasfollows1RealizetheUGandADAMSdataconversion,andthesimulationofvirtualprototype2)Analysisofthechassisforceindifferentspeed3ReaserchdynamicbalancinginADAMS4RealizetheUGandANSYSdataconversion,andgeneratethe.mnffile5ToachievedataconversionofADAMSandANSYS,andrealizationthecoupledmodelofthemechanismandthesimulationanalysisinADAMS6ExtractiontheloadfileofSimulationandtakeplantingarmshellstrengthanalysisinANSYSKeywordswidenarrowdistancetransplatingmechanismdynamicbalanceflexiblebodyANSYSADAMS目录摘要Abstract第一章绪论.......................................................................................................................................11.1课题研究的背景和意义.............................................................................................................11.1.1研究背景..............................................................................................................................11.1.2研究意义..............................................................................................................................11.2行星系分插机构的研究现状....................................................................................................21.2.1传统行星系分插机构.........................................................................................................21.2.2宽窄行行星系分插机构....................................................................................................41.3研究内容.......................................................................................................................................51.4课题的研究思路.........................................................................................................................61.4.1联合仿真分析.....................................................................................................................6第二章UG三维建模及虚拟样机装配.....................................................................................82.1虚拟样机技术..............................................................................................................................82.2栽植臂装配图..............................................................................................................................82.3UG建立分插机构虚拟样机的三维模型...................................................................................92.4ADAMS仿真步骤........................................................................................................................112.4.1创建几何模型....................................................................................................................112.4.2创建约束和运动...............................................................................................................112.4.3施加力................................................................................................................................122.4.4添加驱动............................................................................................................................122.4.5仿真分析与结果后处理..................................................................................................132.5建立分插机构虚拟样机...........................................................................................................132.5.1分插机构三维模型导入ADAMS.......................................................................................132.5.2定义分插机构构件属性..................................................................................................142.5.3添加运动副.......................................................................................................................152.5.4施加载何及驱动...............................................................................................................162.5.5分插机构虚拟样机仿真..................................................................................................172.6本章小结....................................................................................................................................19第三章基于ADAMS的配重研究..............................................................................................203.1不同转速下支座力的研究.......................................................................................................203.2确定配重块位置.......................................................................................................................213.2添加配重块................................................................................................................................213.3参数化配重块半径...................................................................................................................213.4设计研究....................................................................................................................................223.5最优化求解................................................................................................................................233.6结果分析....................................................................................................................................233.7本章小结....................................................................................................................................24第四章基于ANSYS和ADAMS的栽植臂壳体强度分析...................................................254.1ADAMS建立柔性体....................................................................................................................254.1.1离散柔性连接...................................................................................................................254.1.2利用有限元程序建立柔性体..........................................................................................254.1.3利用ADAMS/AutoFlex创建柔性体...............................................................................254.2UG、ANSYS、ADAMS之间的数据转换.....................................................................................264.2.1UG与ANSYS之间的数据转换........................................................................................264.2.2UG与ADAMS之间的数据转换.........................................................................................264.2.3ANSYS与ADAMS之间的数据转换...................................................................................264.3ANSYS生成模态中性文件........................................................................................................274.3.1设置单位制.......................................................................................................................274.3.2设定单元类型...................................................................................................................274.3.3定义材料属性...................................................................................................................274.3.4设置实常数.......................................................................................................................274.3.5定义单元截面...................................................................................................................284.3.6划分网格............................................................................................................................284.3.7建立蜘蛛网模型...............................................................................................................294.3.8ANSYS生成柔性体中性文件...........................................................................................314.4ADAMS生成载荷文件................................................................................................................314.4.1替换刚性栽植臂壳体.......................................................................................................314.4.2定义外部载荷....................................................................................................................324.4.3刚柔耦合模型运动仿真分析..........................................................................................324.4.4输出载荷文件...................................................................................................................334.5栽植臂壳体强度分析...............................................................................................................374.6本章小结....................................................................................................................................39第五章总结与展望......................................................................................................................405.1总结............................................................................................................................................405.2展望............................................................................................................................................40参考文献...........................................................................................................................................42致谢......................................................................................................................................................44第一章绪论

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