Time-frequency analysis of vehicle/bridge coupling system based on Hilbert-Huang Transform

Author

Chen, S.X. ; Lin, J.H. ; Chen, J.Z.

Author_Institution

State Key Lab. of Traction Power, Southwest Jiaotong Univ., Chengdu, China

fYear

2011

fDate

8-10 Aug. 2011

Firstpage

6052

Lastpage

6055

Abstract

In order to investigate the change of time-frequency characteristics of vehicle/track/bridge coupling system caused by wheel tread reprofiling, a coupling model of vehicle/track/bridge system is developed, the empirical mode decomposition (EMD) and Hilbert-Huang Transformation (HHT) are introduced to the analysis of vibration signal. Based on the theory of vehicle/track/-bridge coupling dynamics, vibration acceleration of coupling system of motor car moving over bridge are calculated before and after wheel tread reprofiling, respectively. Vibration signal of coupling system is firstly decomposed into intrinsic mode functions (IMFs) by EMD method, and then Hilbert marginal spectrum is obtained from Hilbert-Huang transform. Compared with Fourier amplitude spectrum, Hilbert spectrum has higher resolution power in frequency domain in the time-frequency analysis. The simulation indicates that the proposed method is effective in the time-frequency characteristics extraction of vehicle/track/bridge coupling system.

Keywords

Hilbert transforms; automobiles; bridges (structures); structural engineering; time-frequency analysis; vehicle dynamics; vibrations; wheels; EMD method; Hilbert marginal spectrum; Hilbert-Huang transforms; empirical mode decomposition; intrinsic mode functions; motor cars; time frequency analysis; vehicle-track-bridge coupling system; vibration acceleration; vibration signal analysis; wheel tread reprofiling; Bridges; Couplings; Mathematical model; Rails; Vehicle dynamics; Vehicles; Wheels; Hilbert spectrum; empirical mode decomposition; vehicle/track/bridge coupling dynamics; vibration signal; wheel tread reprofiling;

fLanguage

English

Publisher

ieee

Conference_Titel

Artificial Intelligence, Management Science and Electronic Commerce (AIMSEC), 2011 2nd International Conference on

Conference_Location

Deng Leng

Print_ISBN

978-1-4577-0535-9

Type

conf

DOI

10.1109/AIMSEC.2011.6009895

Filename

6009895