Research of High-Power Underwater Explosive Based on Analysis of Underwater Energy

2013 ◽  
Vol 848 ◽  
pp. 183-187
Author(s):  
Qiu An Huang ◽  
Geng Guang Xu ◽  
Yong Jiang Wei ◽  
Xue Mei Liu
Keyword(s):  
Shock Wave ◽  
High Power ◽  
Energy Output ◽  
Underwater Shock Wave ◽  
Tnt Equivalent ◽  
Shock Wave Energy ◽  
Output Structure ◽  
Main Charge ◽  
New Type ◽  
Underwater Shock

In this paper,by researching the underwater energy output structure of explosion and improving the technical method to enhance the energy of underwater high-power explosive,a new type of underwater high-power PBX explosive was developed. This type of PBX,of which the underwater shock wave energy was 1.75 TNT equivalent and its bubble energy was 2.41 TNT equivalent,was suitable for the main charge of underwater weapon warhead and its energy archived the domestic leading level.

Effects of Steel Case on Underwater Shock Wave

2011 ◽  
Vol 52-54 ◽  
pp. 943-948
Author(s):  
Ji Li Rong ◽  
Da Lin Xiang ◽  
Jian Li
Keyword(s):  
Shock Wave ◽  
Peak Pressure ◽  
Underwater Explosion ◽  
Steel Shell ◽  
Cylindrical Charge ◽  
Underwater Shock Wave ◽  
Shock Wave Energy ◽  
Lag Effect ◽  
Underwater Shock ◽  
Different Thickness

The effects of steel case confinement for the aluminized explosive on underwater explosion(UNDEX) were experimentally and numerically investigated. The experimental results using 1kg cylindrical charge cased 6mm steel shell, show that steel case enhance the peak pressure, impulse, shock wave energy and decay time relative to the bare charge. The effect of different thickness of steel case was analyzed. With the increase of the case thickness, the shock wave were enhanced first and weaken later, and there is a lag-effect for the peak pressure of shock wave. There is an optimal case thickness which could maximum enhance the peak pressure. According to dimensional analysis, it's found that the ratio of case mass and charge mass( ) is a better dimensionless parameter to estimate UNDEX for a cased charge.

Explosive Welding Using Underwater Shock Wave Generated by the Detonation of the Detonating Code

2011 ◽  
Vol 673 ◽  
pp. 265-270 ◽  
Author(s):  
Akihisa Mori ◽  
Li Qun Ruan ◽  
Kazumasa Shiramoto ◽  
Masahiro Fujita
Keyword(s):  
Shock Wave ◽  
Sound Velocity ◽  
Detonation Velocity ◽  
Explosive Welding ◽  
New Method ◽  
Underwater Shock Wave ◽  
Metal Plates ◽  
Experimental Parameters ◽  
Underwater Shock ◽  
Point Velocity

Detonating code is a flexible code with an explosive core. It is used to transmit the ignition of explosives with high detonation velocity in the range of 5.5 to 7 km/s. However, it is difficult to use detonating code for the explosive welding of common metals since the horizontal point velocity usually exceeds the sound velocity. Hence, in the present work, a new method using underwater shock wave generated by the detonation of detonating code was tried. The details of the experimental parameters and the results are presented. From the results it is observed that the above technique is suitable to weld thin metal plates with relatively less explosives.

Von Neumann reflection of underwater shock wave

1999 ◽  
Vol 85 (1-3) ◽  
pp. 48-51 ◽  
Author(s):  
Y Nadamitsu ◽  
Z.Y Liu ◽  
M Fujita ◽  
S Itoh
Keyword(s):  
Shock Wave ◽  
Underwater Shock Wave ◽  
Von Neumann ◽  
Underwater Shock

Numerical Simulation on Explosive Welding Process Using Reflected Underwater Shock Wave

2007 ◽  
Vol 566 ◽  
pp. 309-314
Author(s):  
Kazumasa Shiramoto ◽  
Masahiro Fujita ◽  
Yasuhiro Ujimoto ◽  
Hirofumi Iyama ◽  
Shigeru Itoh
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Explosive Welding ◽  
Welding Process ◽  
Underwater Shock Wave ◽  
Underwater Shock ◽  
Effective Use

The paper describes a numerically simulated result for the explosive welding using reflected underwater shock wave. Through the numerical simulation, the effective use of reflected underwater shock wave was clearly suggested and the method to improve the assembly was demonstrated.

An underwater shock wave research device

1991 ◽  
Vol 62 (7) ◽  
pp. 1849-1854 ◽  
Author(s):  
Fernando E. Prieto ◽  
Achim M. Loske ◽  
Frederick L. Yarger
Keyword(s):  
Shock Wave ◽  
Underwater Shock Wave ◽  
Wave Research ◽  
Underwater Shock

scholarly journals Study of Ho:YAG Laser Generated Underwater Shock Waves and Cavity Bubble for Revascularization Therapy

2000 ◽  
Author(s):  
S. H. R. Hosseini ◽  
T. Hirano ◽  
O. Onodera ◽  
K. Takayama
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Optical Fiber ◽  
Optical Fibers ◽  
Early Stage ◽  
Underwater Shock Wave ◽  
Ho:Yag Laser ◽  
Direct Laser ◽  
Order Of Magnitude ◽  
Underwater Shock

Abstract For applying shock waves to precise medical procedures like neurosurgery, a reliable generation of micro shock waves is required. Such sensitive applications make limits on usage of conventional underwater shock wave sources like Extracoporeal Shock Waves ESW [1] or micro explosives [2]. In the present study a Q-switched Ho:YAG laser and an optical fiber are used. Advantages of this method over previous shock wave sources are two order of magnitude reduction in focusing area if compared with ESW and elimination of product gases of micro explosives. Nakahara and Nagayama [3] studied underwater shock waves emanated from surface of an optical fiber by pulse Nd:YAG laser input using shadowgraph technique. Their qualitative study limited to visualization of shock waves at its early stage. The present research aims to clarify quantitatively process of the shock wave generation by direct laser beam irradiation through optical fibers, growth and behavior of generated cavities, and structure of heat induced flow in front of the optical fiber.

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