摘要
针对立铣加工系统动力学建模问题,笔者提出了一种立铣刀与刀柄结合部的模型。建立了坐标系,定义了子结构及结合部的导纳函数。采用包含了线性刚度和扭转刚度及相应阻尼项的刚度矩阵表征结合部。采用导纳综合法分析了其耦合导纳函数。研究了基于遗传算法辨识模型刚度和阻尼参数的方法,算例及试验研究结果表明遗传算法辨识模型参数准确,与试验测试一致性较好。
Aimed at the issue of modeling end milling process systems,this paper proposes a two-component dynamic model for assembly.The coordinate systems are established,and the receptance of the substructures and combination unit are defined.A complex frequency-dependent stiffness matrix that contains linear stiffness,rotation stiffness and damping are adopted to describe the dynamical model of the combination unit.Receptance coupling substructure analysis is employed to predict the dynamics of the whole assembly.Based on the genetic algorithm,the value of stiffness and damping are identified.A case study proves that the proposed method has good precision to identify the parameters.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2014年第5期868-872,976,共5页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(51105067
51135003)
"高档数控机床与基础制造装备"科技重大专项课题资助项目(2013ZX04011011)
关键词
遗传算法
立铣
建模
参数识别
导纳综合
genetic algorithm
end milling
modeling
parameter identification
receptance coupling
