Wavelet analysis on shock response of a real ship subjected to non-contact underwater explosion

Xie Yaoguo; Yao Xiongliang; Cui Hongbin; Li Xinfei

doi:10.11883/1001-1455(2017)01-0099-08

Volume 37 Issue 1

Jan. 2017

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Xie Yaoguo, Yao Xiongliang, Cui Hongbin, Li Xinfei. Wavelet analysis on shock response of a real ship subjected to non-contact underwater explosion[J]. Explosion And Shock Waves, 2017, 37(1): 99-106. doi: 10.11883/1001-1455(2017)01-0099-08

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Wavelet analysis on shock response of a real ship subjected to non-contact underwater explosion

doi: 10.11883/1001-1455(2017)01-0099-08

College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China

Received Date: 2015-07-01
Rev Recd Date: 2015-12-18
Publish Date: 2017-01-25

Abstract

Abstract

With a view to obtaining the characterisstic of shock response of the hull to underwater explosion, based on the experimental impact vibration data subjected to underwater explosion trial of ship, the time-frequency characteristics of the monitored impact vibration signals were studied by wavelet analysis. By using these signals, the acceleration-time curves and the energy distributions in different blasting frequency bands were obtained. The result show that the time-frequency characteristics of impact vibration can be obtained by the wavelet analysis, it is easy to get the time-frequency information details of the impact vibration signal intensity, frequency and duration, including the peak values and attenuation and vibration energy of impact vibration signals. Based on the analysis of the energy statistics and impact strength of the wavelet frequency band, found that has a wide distribution of shock response spectrum energy, more than 80% of vibration energy distributed above 312.5Hz at the main deck and below deck, and more vibration energy in low frequency at superstructure deck platform.
- mechanics of explosion,
- time-frequency characteristic,
- wavelet analysis,
- real ship,
- underwater explosion,
- shock response

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References

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