Vibration analysis for underwater explosion in a small pond with diameter of 5.5 meters

DOI

10.2991/ifeesm-17.2018.218How to use a DOI?

Keywords

underwater explosion; vibration signal; Hilbert Huang transform; explosion mechanics

Abstract

With the development of marine resources and the demand of marine military protection, underwater explosion technology is getting more and more attention. The underwater explosion experiments with single charge & double charges were carried out in a small cylinder explosion pond with diameter of 5.5 m, height of 3.62 m in the paper. Blasting vibration testers of Ubox-5016 type were adopted to detect the vibration signal near the pond, and the results show that: (1) With the increasing of distance, the vibration velocity decreases, while the main vibration frequency increases. And, the increasing of the charge quantity, the vibration velocity increases. (2) From Hilbert energy spectrum analysis, the frequency distribution of underwater explosion vibration energy is within the range of 100 Hz, and the main energy is mainly concentrated in low frequency region below 50 Hz, but, the energy components for the frequency band range from 50 to 100 Hz is less. Moreover, the marginal spectrum analysis shows that the main vibration frequency band is in the range of 3 to 10 Hz. (3)Through the analysis of the energy spectrum and the marginal spectrum of the vibration signals by the HHT transform. It further verifies that the millisecond delay initiation can reduce the vibration energy of underwater explosion and the vibration effects. The results and analysis in the paper have important reference value for the design of hydraulic structures and the protection of underwater military confrontation.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Quan Wang
AU  - Zhimin Li
AU  - Youfu Tang
PY  - 2018/02
DA  - 2018/02
TI  - Vibration analysis for underwater explosion in a small pond with diameter of 5.5 meters
BT  - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
PB  - Atlantis Press
SP  - 1186
EP  - 1192
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-17.2018.218
DO  - 10.2991/ifeesm-17.2018.218
ID  - Wang2018/02
ER  -