中国机械工程Issue(22)：3081-3087,7.DOI:10.3969/j.issn.1004-132X.2014.22.019
基于贝叶斯运行模态分析法的砂轮架动态特性分析
Dynamic Characteristics Analysis of Wheelhead Based on Bayesian OMA Approach
摘要
Abstract
In order to study the wheelhead’s intrinsic modes from natural environment and har‐monic modes under working conditions ,a modal parameter identification technology based on Bayesian theory and OMA - Bayesian OMA approach was adopted .It was applied to identify the wheelhead’s modal property by ambient vibration tests using different setups .The dynamic characteristics obtained included the natural frequencies ,mode shapes and damping ratios ,which were compared with tradi‐tional experimental modal analysis results then to verify the feasible practical applications of Bayesian OMA approach .The estimation for the level of excitation ,prediction error and signal-to-noise ratio al‐so added to the approach’s uniqueness .Furthermore ,vibration tests were conducted for the wheel‐head under operational situations .The contrast between identified results from natural environment and power spectral density(PSD) in actual working conditions helps to distinguish the wheelhead’s in‐trinsic modes and harmonic modes caused by periodic excitation successfully .关键词
贝叶斯理论/运行模态分析/动态特性/谐波模态Key words
Bayesian theory/operational modal analysis(OMA)/dynamic characteristics/harmonic mode分类
数理科学引用本文复制引用
胡育佳,徐琳琳,李郝林..基于贝叶斯运行模态分析法的砂轮架动态特性分析[J].中国机械工程,2014,(22):3081-3087,7.基金项目
国家自然科学基金资助项目（11002084）；上海市教委创新基金资助项目（12YZ092，12YZ074）；沪江基金资助项目 （）
