Title :
Application of EMMD in Modal Parameter Identification of Structures under Ambient Excitation
Author :
Sun, Zhaowei ; Liu, Xiaoping
Author_Institution :
Sch. of Autom., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
This paper mainly provides a modal parameter identification method based on combination of extremum field mean mode decomposition (EMMD) and random decrement technique (RDT), which is applied to structures under ambient excitation. In this method, firstly, a number of intrinsic mode functions (IMFs) are decomposed from acceleration response of structure under ambient excitation by using EMMD. Next, the RDT is applied to calculate response of free vibration for each IMF, and then identify the modal parameters from free vibration response. The principle and concrete steps of the method are given in this paper, and the feasibility and validity of this method are demonstrated through a emulation experiment.
Keywords :
parameter estimation; structural engineering; vibrations; EMMD application; ambient excitation; extremum field mean mode decomposition; free vibration; intrinsic mode functions; modal parameter identification; random decrement technique; structures; Acceleration; Damping; Mirrors; Parameter estimation; Spline; Structural beams; Vibrations; EMMD; RDT; ambient excitation; boundary-extension; local wave method (LWM); modal parameters identification;
Conference_Titel :
Intelligence Information Processing and Trusted Computing (IPTC), 2010 International Symposium on
Conference_Location :
Huanggang
Print_ISBN :
978-1-4244-8148-4
Electronic_ISBN :
978-0-7695-4196-9
DOI :
10.1109/IPTC.2010.130