复合材料冲击声的双谱分析

SICE 2000. Proceedings of the 39th SICE Annual Conference. International Session Papers (IEEE Cat. No.00TH8545) Pub Date : 2000-07-26 DOI:10.1109/SICE.2000.889648

T. Ogawa, H. Kanada, K. Mori, M. Sakata

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引用次数: 3

摘要

在材料工程领域，提出了一种利用复合材料受到撞击时产生的声音来估计复合材料弹性模量的方法。为了从冲击声中估计弹性模量，我们必须从得到的时间序列波形中估计材料振动的固有频率。在本报告中，我们证明了双谱分析可以比功率谱分析更清楚地估计复合材料振动的固有频率。

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Bispectrum analysis for impact sound of composite materials

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.

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来源期刊

SICE 2000. Proceedings of the 39th SICE Annual Conference. International Session Papers (IEEE Cat. No.00TH8545)

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