THE ORTHOGONAL HILBERT-HUANG TRANSFORM AND ITS APPLICATION IN EARTHQUAKE MOTION RECORDINGS ANALYSIS

摘要：

Based on the numerical simulation, the problem that the intrinsic mode functions (IMFs) decomposed by the empirical mode decomposition (EMD) in Hilbert-Huang transform (HHT) are not exactly orthogonal is presented. A new method based on the Gram-Schmidt orthogonalization method referred as the orthogonal empirical mode decomposition (OEMD) is proposed and the complete orthogonal intrinsic mode functions (OIMFs) are attained. The method is validated through the decomposition of a typical time history and demonstrated through the El Centro earthquake recording. The comparison between the Hilbert spectrum, the Hilbert marginal spectrum and the orthogonal Hilbert spectrum, the orthogonal Hilbert marginal spectrum of the El Centro earthquake recording showed that the latter can more faithfully and quantitatively characterize the signal energy distribution at different frequency components.

关键词： Orthogonality empirical mode decomposition intrinsic mode function Hilbert-Huang transform Earthquake motion recording analysis

作者: Tianli Huang Weixin Ren Menglin Lou

作者单位: Ph. D., School of Civil Engineering & Architecture, Central South University, Changsha, P. R. China Professor, School of Civil Engineering & Architecture, Central South University, Changsha, P. R. Chi Professor, School of Civil Engineering, Tongji University, Shanghai, P. R. China

会议类型: 国际会议

会议名称: 14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)

会议地点: 北京

会议语种:英文

在线出版日期: 2008-10-12（万方平台首次上网日期，不代表论文的发表时间）