林区智能作业车臂架动力学建模及优化设计  

Dynamic Modeling and Optimization Design of the Boomof Intelligent Work Vehicles in Forest Areas

作　　者：翁天浩 邓旻涯 李科军 WENG Tianhao;DENG Minya;LI Kejun(College of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China)

机构地区：[1]中南林业科技大学材料科学与工程学院,长沙410004

出　　处：《森林工程》2024年第2期159-167,共9页Forest Engineering

基　　金：湖南省自然科学基金面上项目(2022JJ31015)。

摘　　要：针对林区作业环境复杂等问题,设计一款面向林区作业的林区智能作业车。建立作业车臂架系统的运动学和动力学模型并进行三维软件仿真和优化设计。首先,采用解析几何法与拉格朗日动力学方程结合,建立臂架系统的动力学模型。其次,利用软件NX1899的机构动力学仿真工具Simcenter 3D Motion对臂架系统进行分析,得到臂架系统各油缸驱动力和行程随时间变化曲线。最后,基于响应面BBD(Box-Behnken design)设计响应面试验,对变幅油缸前后两铰点位置进行优化。结果表明,在油缸行程仅增加0.000 04%情况下,油缸驱动力减小2.33%,BBD所提供的试验设计可靠。因此,该动力学模型可为油缸选型和油缸受力优化提供理论依据。To address the complex working environment in forest areas,a forest intelligent work vehicle was designed for forest operations.The kinematic and dynamic models of the boom system of the work vehicle was established and the 3D software simulation and optimization design were carried out.Firstly,a dynamic model of the boom system was established by combining analytical geometry with Lagrangian dynamic equations.Secondly,the mechanism dynamics simulation tool Simcenter 3D Motion of software NX1899 was used to analyze the boom system,and the time-dependent curves of the driving force and stroke of each cylinder in the boom system was obtained.Finally,response surface experiments were designed based on Box Behnken design(BBD)to optimize the positions of the front and rear hinge points of the variable amplitude oil cylinder.The results showed that when the cylinder stroke only increased by 0.00004%,the driving force of the cylinder decreased by 2.33%,and the experimental design provided by BBD was reliable.Therefore,this dynamic model can provide a theoretical basis for cylinder selection and force optimization of the cylinder.

关 键 词：林区智能作业车 臂架系统 动力学建模 油缸驱动力 优化 

分 类 号：S776.34[农业科学—森林工程]