摘要
针对机器人、空间结构等领域的应用,给出了一种三棱柱剪式可展结构的构型设计、传动方案设计及零部件详细设计。建立了考虑节点5个自由度的剪式铰单元有限元模型,对其刚度矩阵和质量矩阵进行了有效缩聚,减少了计算量;把剪式铰单元作为重复的子结构,建立了三棱柱剪式可展结构的有限元模型及其振动方程;在此基础上进行模态分析和仿真,得到前8阶固有频率及相应的振型曲线;并给出了三棱柱剪式可展结构的1阶固有频率随展开角的变化关系,为三棱柱剪式可展结构的优化设计和控制提供了依据。
The configuration design,transmission scheme design and detail design of a triangular prism deployable scissor structure are presented for application in the fields as robot,space structure and etc.The finite element model of scissor hinge unit that takes five dimensions of freedom of each node into consideration is established.The stiffness matrix and mass matrix of scissor hinge unit is minimized effectively and the amount of calculation is reduced.By taking the scissor hinge unit as a repetitive substructure,the finite element model and vibration equation of triangular prism scissor deployable structure are constructed.Based on this,the eight step natural frequencies and respective vibration mode curves are obtained after the dynamic analysis and simulated.The relationship between the first step natural frequency and deploy angle of triangular prism scissor deployable structure is provided.The present work has laid a foundation for the design and control of triangular prism scissor deployable structure.
出处
《机械设计》
CSCD
北大核心
2011年第10期55-60,共6页
Journal of Machine Design
基金
国家自然科学基金资助项目(50875044)
关键词
剪式结构
可展结构
有限元方法
动力学分析
scissor structure
deployable structure
finite element method
dynamic analysis
