Title :
Bispectrum analysis for impact sound of composite materials
Author :
Ogawa, Takehiko ; Kanada, Hajime ; Mori, Kiyomi ; Sakata, Masaru
Author_Institution :
Dept. of Electron. & Syst., Takushoku Univ., Tokyo, Japan
Abstract :
A method to estimate the elastic moduli of a composite material by the sound that occurs at an impact on the composite material was proposed in the field of the material engineering. To estimate elastic moduli from the impact sound, we have to estimate the natural frequencies of the vibration of the material from the obtained time-series waveform. In this report, we show that the natural frequencies of the vibration of the composite material can be estimated by the bispectrum analysis more clearly than the power spectrum analysis
Keywords :
acoustic emission testing; composite materials; elastic moduli measurement; impact testing; spectral analysis; time series; bispectrum analysis; composite materials; elastic modulus estimation; impact sound; material engineering; power spectrum analysis; time-series waveform; vibration natural frequencies estimation; Composite materials;
Conference_Titel :
SICE 2000. Proceedings of the 39th SICE Annual Conference. International Session Papers
Conference_Location :
Iizuka
Print_ISBN :
0-7803-9805-X
DOI :
10.1109/SICE.2000.889648
