摘要
机床电主轴的精细化动力学建模是确保其高速高精且平稳运行的理论基础。电主轴结构复杂,而采用统计能量分析原理可以实现对复杂系统动力学模型的求解。针对统计能量分析研究模型中的关键参数,以耦合损耗因子为研究对象,建立了多结构的内损耗因子、总损耗因子、能量比及耦合损耗因子的试验理论模型;依据瞬态衰减法测试并通过数据处理获得了耦合子系统内损耗因子和总损耗因子,利用均值导纳法获取耦合子系统能量比,根据瞬态能量平衡方程计算了耦合损耗因子;通过与理论分析对比,验证了提出的瞬态激励试验实现耦合损耗因子的测量分析方法是正确的。该方法可实现快速高效的获取复杂动力学系统的耦合损耗因子。
The refinement dynamic model of electrical spindle is significant for design to keep machine operating smoothly in high speed.Statistical energy analysis is proved to be effective to solve the dynamics of complicated system,such as the electrical spindle.In order to investigate the key parameters by statistical energy analysis,an experiment was carried out to build models of the damping loss factors,the total loss factors,the energy ratio and the coupling loss factors.The damping loss factors and total loss factors of coupling subsystem were obtained by processing the data form attenuation response by transient excitation.The coupling subsystems energy ratio was worked out by the average admittance.The coupling loss factor was calculated by solving the transient energy balance equations.By comparing with theoretical analysis,it is testified that the measurement and analysis method are effective to obtain the coupling loss factors by the transient excitation.They are useful to get the coupling loss factors of complicated dynamics system easily and efficiently.
作者
李海虹
王菲
LI Haihong;WANG Fei(College of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2018年第16期98-103,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51541501)
山西省"1331工程"重点学科建设计划
关键词
瞬态激励
总损耗因子
均值导纳法
耦合损耗因子
transient excitation
total loss factors
average admittance
coupling loss factors
