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| Experimental study on the influence of the bottom medium on the peak pressure of explosion shock waves in shallow water |
| WANG Zhenxiong1,GU Wenbin 1,CHEN Jianghai 1,XU Jinglin 1,LIU Xin1,LU Ming2 |
1.College of Field Engineering,PLA University of Science and Technology,Nanjing 210007,China;
2.Wuhan Ordnance N.C.O school,Wuhan 430075,China |
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Abstract Peak pressure of the shock wave in water,an important factor for evaluating shock wave intensity of the underwater explosion,is vital to relevant studies. Based on the similarity law of the explosion,this research makes a deduction on similar requirements of the simulation experiments of underwater explosion and establishes the regression model about peak pressure of the underwater shock wave under test condition. Simulated tests were carried out under the condition of two types of water bottom media and different water depths,then peak pressures of underwater blast wave at different measuring points were acquired. Through formula fitting of test data by the π theorem,dimensional analysis and the least squares,a formula consistent with similarity law of explosion was obtained. And the analysis on regression precision of formula verified its accuracy. Significance test indicates that the influence of distance between measuring points and charge on peak pressure of underwater blast wave is the largest while that of water depth is the least and can be ignored. With analysis on data from tests with different water media,it is concluded that water bottom mediums affect peak pressure more. And peak pressure of blast wave in test at the water bottom of soft mud with stones is about 4/3 times that of the water bottom of soft mud.
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Received: 10 October 2015
Published: 15 February 2017
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