果树振动力学模型分析与油茶枝干广义坐标系建立  

Mechanics Vibration Model of Fruit Tree Analysis and Generalized Coordinate System Establishment for Camellia Oleifera branches

作　　者：李芝茹 周建波 吴晓峰 李全罡 张北航 童琳 韩立志 胡景阳 李旭厚 LI Zhi-ru;ZHOU Jian-bo;WU Xiao-feng;LI Quan-gang;ZHANG Bei-hang;TONG Lin;HAN Li-zhi;HU Jing-yang;LI Xu-hou(Harbin Research Institute of Forestry Machinery,National Forestry and Grassland Administration,Harbin Heilongjiang 150086,China;Forestry Equipment Engineering Technology Center,National Forestry and Grassland Administration,Harbin Heilongjiang 150086,China)

机构地区：[1]国家林业和草原局哈尔滨林业机械研究所,黑龙江哈尔滨150086 [2]国家林业和草原局林业装备工程技术研究中心,黑龙江哈尔滨150086

出　　处：《林业机械与木工设备》2025年第2期70-74,共5页Forestry Machinery & Woodworking Equipment

基　　金：国家重点研发计划资助项目(2022YFD2202104);中央级公益性科研院所基本科研业务费专项“油茶振动采收能量传递规律和采收机理研究”(CAFYBB2024MA028)。

摘　　要：针对油茶树树形复杂、个体差异大、“花果同期”且花果坐落位置不固定,导致力学模型难以建立的现状,在综合分析现有受迫振动下果树力学模型基础上,应用集中质量法建立空间形态油茶树的广义坐标系:首先进行条件假设与边界条件建立,忽略风场、地磁场、地电场作用,将主干、各级分枝看成物理参数均匀连续分布的连续体系统,振动中的受力变形服从胡克定律;建立油茶植株绝对坐标系(x,y,z)、主干坐标系(x_(0),y_(0),z_(0))、各级分枝坐标系(x_(n),y_(n),z_(n))以及花、果坐标系(x_(i+1),y_(i+1),z_(i+1)),通过坐标平移、坐标旋转等变换将空间不同平面分枝、花、果转换到同一坐标系中,为后续的静力学分析与动力学模型建立奠定基础。In view of the complexity shape of Camellia Oleifera,large individual differences,simultaneous fruits and flowers,and the location of flowers and fruits are not fixed,which makes it difficult to establish a mechanical model.Based on the comprehensive analysis of the existing mechanical model of fruit trees under forced vibration,the generalized coordinate system of spatial morphology of camellia camellia tree was established by applying the concentrated mass method:Firstly,conditional assumptions and boundary conditions are established.Ignoring the effects of wind field,geomagnetic field and geomagnetic field,the trunk and branches are regarded as a continuous system with uniform and continuous distribution of physical parameters,and the force and deformation in vibration obey Hooke's law.The absolute coordinate system(x,y,z),main coordinate system(x_(0),y_(0),z_(0)),branch coordinate system at all levels(x_(n),y_(n),z_(n))and flower and fruit coordinate system(x_(i+1),y_(i+1),z_(i+1))of Camellia Oleifera were established,and the branches,flowers and fruits of different planes in space were converted into the same coordinate system through coordinate translation and coordinate rotation.It lays a foundation for the subsequent statics analysis and dynamics model establishment.

关 键 词：机械振动采收 动力学模型 能量传递 坐标转换 

分 类 号：S66[农业科学—果树学] TH113[农业科学—园艺学]