湖南大学学报（自然科学版）2011，Vol.38Issue(8)：13-18,6.
HHT方法在结构模态参数识别中的改进
Improvement of H HT in Structural Modal Parameter Identification
摘要
Abstract
Based on the HHT (Hilbert-Huang Transform), the Chebyshev I type filter was adopted to process the measured free vibration signal to solve the mode-mixing problem, so that all the structural modes could be acquired from IMFs. Meanwhile, removing endpoints were used during the linear least-square fit procedure to avoid the endpoint effect. Besides obtaining the modal frequencies and damping ratios, the formulation of mode shapes of proportional-damping structure was also derived. The simulation results of 4-NDOF numerical case and 4-NDOF frame structure in the laboratory have demonstrated that the proposed approach is accurate and effective.关键词
模态参数识别/Hilbert- Huang变换/ChebyshevⅠ类滤波器/模态混淆/端点问题Key words
modal parameter identification/ Hilbert-Huang transformation/ Chebyshev type I filter/mode mixing/ endpoint effect分类
建筑与水利引用本文复制引用
祁泉泉,辛克贵,杜运兴,崔定宇..HHT方法在结构模态参数识别中的改进[J].湖南大学学报（自然科学版）,2011,38(8):13-18,6.基金项目
国家自然科学基金资助项目(50878117) （50878117）
