2013 Vol. 33, No. 5
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2013, 33(5): 449-455.
doi: 10.11883/1001-1455(2013)05-0449-07
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Abstract:
A five-stage cylindrical stepped-wall observation chambers and a cylindrical observation chambers were designed to explore the expansion characteristics of high-temperature high-pressure twin combustion-gas jets in bulk-loaded liquid. The expansion p...
2013, 33(5): 456-462.
doi: 10.11883/1001-1455(2013)05-0456-07
Abstract:
The critical impact velocity range was obtained by using the updown method in the fragment impact experiments. In the numerical simulations, the mechanical damage and ignition reaction of the charge were depicted by the node tiebreaking method and ...
2013, 33(5): 463-470.
doi: 10.11883/1001-1455(2013)05-0463-08
Abstract:
For the explosion and shock loading in the 1-100 s time scale, the linear visco-elastic ZWT constitutive equation under a three-dimensional stress state was derived by ignoring the relaxation effect of the low-frequency Maxwell element and the nonlin...
For the explosion and shock loading in the 1-100 s time scale, the linear visco-elastic ZWT constitutive equation under a three-dimensional stress state was derived by ignoring the relaxation effect of the low-frequency Maxwell element and the nonlin...
2013, 33(5): 471-478.
doi: 10.11883/1001-1455(2013)05-0471-08
Abstract:
Numerical simulations were conducted to investigate the penetration process of single and double fragments produced by a typical missile warhead into the liquid-filled cabin. The penetration process was defined as five typical stages. The velocity at...
Numerical simulations were conducted to investigate the penetration process of single and double fragments produced by a typical missile warhead into the liquid-filled cabin. The penetration process was defined as five typical stages. The velocity at...
2013, 33(5): 479-486.
doi: 10.11883/1001-1455(2013)05-0479-08
Abstract:
A Hopkinson pressure bar device was utilized in high overloading tests for initiators as a high-g-value acceleration generator. And a finite element model was created to simulate the operation process of producing acceleration pulses. The effects of ...
A Hopkinson pressure bar device was utilized in high overloading tests for initiators as a high-g-value acceleration generator. And a finite element model was created to simulate the operation process of producing acceleration pulses. The effects of ...
2013, 33(5): 487-493.
doi: 10.11883/1001-1455(2013)05-0487-07
Abstract:
The subgrid-scale (SGS) turbulence transport terms were modeled by using the stretched-vortex SGS stress model and a large-eddy simulation (LES) code MVFT was developed to investigate the multi-viscous-flow and turbulence problems. Then the interface...
The subgrid-scale (SGS) turbulence transport terms were modeled by using the stretched-vortex SGS stress model and a large-eddy simulation (LES) code MVFT was developed to investigate the multi-viscous-flow and turbulence problems. Then the interface...
2013, 33(5): 494-500.
doi: 10.11883/1001-1455(2013)05-0494-07
Abstract:
In solving the shock response problems of three-dimensional far-field underwater explosion by the material point method, the calculation of the propagation process of the shock wave before it reaches the structure will cost a large amount of computin...
In solving the shock response problems of three-dimensional far-field underwater explosion by the material point method, the calculation of the propagation process of the shock wave before it reaches the structure will cost a large amount of computin...
2013, 33(5): 501-506.
doi: 10.11883/1001-1455(2013)05-0501-06
Abstract:
With a view to obtaining the application prospect of metal-sheathed detonating cords in the research of underwater sound sources, an experimental apparatus called underwater continuous pulse wave generator, which can orderly generate a series of shoc...
With a view to obtaining the application prospect of metal-sheathed detonating cords in the research of underwater sound sources, an experimental apparatus called underwater continuous pulse wave generator, which can orderly generate a series of shoc...
2013, 33(5): 507-512.
doi: 10.11883/1001-1455(2013)05-0507-06
Abstract:
To obtain the mechanical properties and constitutive behaviors of double-base propellant under impact loading, uniaxial compression experiments were performed on the material test machine and the split Hopkinson pressure bar (SHPB) device. The availa...
To obtain the mechanical properties and constitutive behaviors of double-base propellant under impact loading, uniaxial compression experiments were performed on the material test machine and the split Hopkinson pressure bar (SHPB) device. The availa...
2013, 33(5): 513-518.
doi: 10.11883/1001-1455(2013)05-0513-06
Abstract:
To understand the blasting mechanism of electronic detonators in weakening blasting vibration and improving rock fragmentation, a calculation formula was given for the millisecond-delayed time between blasting holes based on the energy change in the ...
To understand the blasting mechanism of electronic detonators in weakening blasting vibration and improving rock fragmentation, a calculation formula was given for the millisecond-delayed time between blasting holes based on the energy change in the ...
2013, 33(5): 519-524.
doi: 10.11883/1001-1455(2013)05-0519-06
Abstract:
The nonlinear dynamic finite element procedure of ANSYS/LS-DYNA was used and the fluid-solid coupling algorithm was selected to numerically simulate the vertical explosion process of underground arch structures. And the wave theory of p-u Hugoniot cu...
The nonlinear dynamic finite element procedure of ANSYS/LS-DYNA was used and the fluid-solid coupling algorithm was selected to numerically simulate the vertical explosion process of underground arch structures. And the wave theory of p-u Hugoniot cu...
2013, 33(5): 525-530.
doi: 10.11883/1001-1455(2013)05-0525-06
Abstract:
Aimed at the dynamic instability problems of a supercavitating projectile subjected to an axial random load, a dynamic partial differential equation for the supercavitating projectile structure was established, and the dynamic stability was numerical...
Aimed at the dynamic instability problems of a supercavitating projectile subjected to an axial random load, a dynamic partial differential equation for the supercavitating projectile structure was established, and the dynamic stability was numerical...
2013, 33(5): 531-536.
doi: 10.11883/1001-1455(2013)05-0531-06
Abstract:
The conventional calibration methods for shock accelerometers include the absolute, relative and comparative methods. A new calibration method, analogy comparison was proposed by synthesizing the advantages of the relative method and the comparison m...
The conventional calibration methods for shock accelerometers include the absolute, relative and comparative methods. A new calibration method, analogy comparison was proposed by synthesizing the advantages of the relative method and the comparison m...
2013, 33(5): 537-543.
doi: 10.11883/1001-1455(2013)05-0537-07
Abstract:
Based on the launching characteristics of an electromagnetic railgun, the formation mechanism of railgun gouging was analyzed, and the formation process of railgun gouging was numerically simulated by using the finite element code ABAQUS. The results...
Based on the launching characteristics of an electromagnetic railgun, the formation mechanism of railgun gouging was analyzed, and the formation process of railgun gouging was numerically simulated by using the finite element code ABAQUS. The results...
2013, 33(5): 544-550.
doi: 10.11883/1001-1455(2013)05-0544-07
Abstract:
A new three-dimensional LS-DYNA program was used to simulate the electromagnetic ring expansion experiment. Some key factors were analyzed for influencing the experimental results: coil winding methods, coil sizes, loading current waveforms, expandin...
A new three-dimensional LS-DYNA program was used to simulate the electromagnetic ring expansion experiment. Some key factors were analyzed for influencing the experimental results: coil winding methods, coil sizes, loading current waveforms, expandin...
2013, 33(5): 551-555.
doi: 10.11883/1001-1455(2013)05-0551-05
Abstract:
The combustion process in the combustion light gas gun chamber was numerically simulated by using the computational fluid dynamics method. And the influences of the different factors on the interior ballistic characteristics of the combustion light g...
The combustion process in the combustion light gas gun chamber was numerically simulated by using the computational fluid dynamics method. And the influences of the different factors on the interior ballistic characteristics of the combustion light g...
2013, 33(5): 556-560.
doi: 10.11883/1001-1455(2013)05-0556-05
Abstract:
Taking the explosion of a 10 kg TNT explosive device in an open, breezeless zone as the background, the states of the detonation products at 1 ms after the explosion were calculated using Autodyn, which provided reliable source term geometric models ...
Taking the explosion of a 10 kg TNT explosive device in an open, breezeless zone as the background, the states of the detonation products at 1 ms after the explosion were calculated using Autodyn, which provided reliable source term geometric models ...
