%0 Journal Article
%T 高速电主轴运行状态下模态识别及高速效应分析<br>Modal Parameter Identification and High-speed Effects Analysis of a High Speed Motorized Spindle under Running State
%A 赵川
%A 王红军
%A 张怀存
%A 徐一闯
%J 机械科学与技术
%D 2016
%X 为了研究电主轴在高速运转状态下的模态及不同转速对主轴固有频率的影响,首先应用有限元法进行电主轴的建模和分析,然后采用环境激励方法对某电主轴进行模态分析。通过实验数据比较,发现随着转速升高,离心力效应和轴承软化效应的综合作用降低了轴承径向支撑刚度,引起前三阶固有频率呈下降趋势,其对高阶固有频率的影响与转速有关。可见以主轴转速所引起的振动作为激振力的环境激励法,能够排除环境及虚模态等复杂干扰,从而准确地对高速运转状态下的主轴系统进行模态参数识别。<br>In order to study the motorized spindle's modal under the high speed running condition and the influence of different rotation speed on the motorized spindle's natural frequency, the finite element method is used for the modeling and analysis of the motorized spindle. Then the modal analysis of the motorized spindle is made on ambient excitation. Though the data comparison, it can be found that with the rise of rotating speed, the combination effect of the centrifugal force and the bearing softening reduces the radial support stiffness of the bearing, resulting in the downward trend of the first three natural frequencies. The impact on the high natural frequency is related to the speed. We can get to know the ambient excitation with the vibration caused by the spindle's speed as the exciting force can be able to eliminate the complex interference from the environment and the virtual modal for identifying the modal parameters of the spindle system
%K 电主轴
%K 环境激励
%K 模态分析
%K 高速效应分析&lt
%K br&gt
%K ambient excitation
%K high-speed effect analysis
%K modal analysis
%K motorized spindle
%U http://journals.nwpu.edu.cn/jxkxyjs/CN/abstract/abstract6407.shtml