Modal Analysis and Wavelet Transform in Evaluating Dam Vibration Response Caused by Blasting

JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2012, Vol. 29 ›› Issue (4): 26-29.

• ENGINEERING SAFETY AND DISASTER PREVENTION • Previous Articles Next Articles

Modal Analysis and Wavelet Transform in Evaluating Dam Vibration Response Caused by Blasting

DENG Cheng-Fa^1,2, XU Chang³, GE Guo-Chang¹

1.Zhejiang Guangchuan Engineering Consultation Co., Ltd., Hangzhou 310020, China; 2.Zhejiang Institute of Hydraulics & Estuary, Hangzhou 310020, China; 3.Department of Municipal Engineering, Zhejiang Water Conservancy and Hydropower College, Hangzhou　　310018, China)

Received:2011-02-28 Online:2012-04-01 Published:2012-06-15

Abstract

Abstract: The safety assessment for blasting vibration of the tunnel excavation near a dam is presented. Spectral analysis is performed to obtain the vibration frequencies. Wavelet multi-resolution analysis is used to extract the vibration energy in different frequency bands, and the energy distribution is also discussed. 3-D finite element vibration modal analysis of the dam with empty or full reservoir is conducted. Considering the safety criterion including vibration frequency, energy, structural modal parameters, and peak values of vibration velocity, we find the dam is safe under the impact of blasting vibration. The result is also helpful for the safety assessment of blasting vibration for similar projects.

Key words: blasting vibration, wavelet, dam, modal analysis, safety criterion

CLC Number:

TU235.4

DENG Cheng-Fa, XU Chang, GE Guo-Chang. Modal Analysis and Wavelet Transform in Evaluating Dam Vibration Response Caused by Blasting[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2012, 29(4): 26-29.

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Modal Analysis and Wavelet Transform in Evaluating Dam Vibration Response Caused by Blasting

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