[1]ZHENG Lulu,LIN Jianmin,PANG Lichen,et al.Research on Time-frequency Analysis and Attributes Extraction of Air-gun Signal Based on HHT[J].Journal of Seismological Research,2016,39(03):466-472.
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Research on Time-frequency Analysis and Attributes Extraction of Air-gun Signal Based on HHT
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
39
Number of periods:
2016 03
Page number:
466-472
Column:
Public date:
2016-07-23
- Title:
- Research on Time-frequency Analysis and Attributes Extraction of Air-gun Signal Based on HHT
- Keywords:
- Hilbert-Huang transform; air-gun source; high-frequency pressure pulse; low-frequency bubble pulse
- CLC:
- P315.3
- DOI:
- -
- Abstract:
- The characteristics of wavelet excited by the air-gun source in shallow water was studied by using the Hilbert-Huang transform. The results indicate that: firstly, the high frequency pressure signal which was excited by the air-gun of pressure pulse has the characteristic of broad frequency band,and dominant frequency with 40～80 Hz, and the primary frequency decreases with time. Then the low frequency bubble pulse which was excited by bubble oscillation induced by high pressure gas in underwater had the characteristic of narrow frequency band,the dominant frequency with 4～12 Hz, and the main frequency of bubble pulse excited by the bubble oscillation was relatively low in shallower water. The obtained study results will contribute to understanding the complicated near-field air-gun signal in shallow water.
- References:
- -
- Similar References:
Memo
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Last Update:
1900-01-01