摘要
系统地阐述了与有限元法相结合的模态试验分析方法。首先利用ANSYS Workbench对加工中心进行有限元模态分析,根据模态分析结果和具体情况布置模态试验激振点和测振点,然后采用单点激励多点响应模态试验分析方法来获取完整模态参数,引入相干性函数分析测试信号的可靠性。最后通过模态试验结果和有限元计算结果对比分析,准确识别出加工中心关键振型的模态参数,为加工中心的动态优化设计提供可靠的基础。
Acomprehensive approach based on modal test and finite element analysis for modal parameters identification is presented in this paper. Firstly, to a vertical machining center, modal analysis is performed by using the software -ANSYS Workbench. Secondly, excitation points and measuring points for modal test are selected according to the analysis results. Then we carried out some modal tests to identify the modal parameters via the single -input multi -output mode. The reliability of tests signals is also evaluated by the coherence function. Finally, results acquired from tests and from simulations are compared, and they are found in a good agreement with each other. All these provide us a solid basis for dynamic optimizing and designing an improved machining center.
出处
《制造技术与机床》
CSCD
北大核心
2010年第8期59-64,共6页
Manufacturing Technology & Machine Tool
基金
粤港关键领域重点突破项目(佛山专项:2008Z51)
关键词
加工中心
动态特性
有限元分析
模态试验
Machining Center
Dynamic Characteristic
Finite Element Analysis
Modal Test
