2016 Vol. 36, No. 4
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2016, 36(4): 433-440.
doi: 10.11883/1001-1455(2016)04-0433-08
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Abstract:
In order to study the ballistic limits and damage properties of the basalt/Kevlar stuffed shields, hypervelocity impact tests were carried out by non-power two-stage light-gas gun facilities. The ballistic limit curves were fitted with the test data,...
In order to study the ballistic limits and damage properties of the basalt/Kevlar stuffed shields, hypervelocity impact tests were carried out by non-power two-stage light-gas gun facilities. The ballistic limit curves were fitted with the test data,...
2016, 36(4): 441-448.
doi: 10.11883/1001-1455(2016)04-0441-08
Abstract:
The detonation initiation distance for stoichiometric C2H4/O2 mixture gas in a narrow gap was experimentally studied at the initial pressure of 5.0-50.0 kPa. The channels were formed by the 10, 20, 30 mm×1.0 mm cross-sections and 1 220 mm long, respe...
The detonation initiation distance for stoichiometric C2H4/O2 mixture gas in a narrow gap was experimentally studied at the initial pressure of 5.0-50.0 kPa. The channels were formed by the 10, 20, 30 mm×1.0 mm cross-sections and 1 220 mm long, respe...
2016, 36(4): 449-456.
doi: 10.11883/1001-1455(2016)04-0449-08
Abstract:
On the basis of the three-wave theory and Whitham's method, the flow fields associated with regular reflection and Mach reflection in high explosives with waveshapers were investigated, and the relevant theoretical model for deriving the detonation c...
On the basis of the three-wave theory and Whitham's method, the flow fields associated with regular reflection and Mach reflection in high explosives with waveshapers were investigated, and the relevant theoretical model for deriving the detonation c...
2016, 36(4): 457-464.
doi: 10.11883/1001-1455(2016)04-0457-08
Abstract:
A series of experiments were conducted to study the factors influencing gas explosion venting in methane-air mixture explosion in linked vessels. For the linked vessels, the maximum explosion venting pressure in both the big vessel and the small vess...
A series of experiments were conducted to study the factors influencing gas explosion venting in methane-air mixture explosion in linked vessels. For the linked vessels, the maximum explosion venting pressure in both the big vessel and the small vess...
2016, 36(4): 465-471.
doi: 10.11883/1001-1455(2016)04-0465-07
Abstract:
The combustion-gas generator and liquid-filled cylindrical chamber are designed to study the expansion characteristics of annular four wall combustion-gas jets under high temperature and high pressure in a confined space. The expansion processes of T...
The combustion-gas generator and liquid-filled cylindrical chamber are designed to study the expansion characteristics of annular four wall combustion-gas jets under high temperature and high pressure in a confined space. The expansion processes of T...
2016, 36(4): 472-482.
doi: 10.11883/1001-1455(2016)04-0472-11
Abstract:
Tanking account of the mass conservation conditions, incompressible conditions and boundary conditions, this paper described the dynamic behaviors of the medium based on the plastic-rigid model and established the compatible dynamic velocity field in...
Tanking account of the mass conservation conditions, incompressible conditions and boundary conditions, this paper described the dynamic behaviors of the medium based on the plastic-rigid model and established the compatible dynamic velocity field in...
2016, 36(4): 483-490.
doi: 10.11883/1001-1455(2016)04-0483-08
Abstract:
By using a split Hopkinson pressure bar (SHPB) technique, impact experiments were carried out on the jointed rock specimens simulated by cement-based mortar specimens. The dynamic responses of the simulated jointed rock material with different joint ...
By using a split Hopkinson pressure bar (SHPB) technique, impact experiments were carried out on the jointed rock specimens simulated by cement-based mortar specimens. The dynamic responses of the simulated jointed rock material with different joint ...
2016, 36(4): 491-496.
doi: 10.11883/1001-1455(2016)04-0491-06
Abstract:
A convenient method for fabricating a layered impactor with a sample backed up by high hardness materials was developed to overcome the obstacle of the shock-reload experiments in the self-consistent yield strength technique. This method was validate...
A convenient method for fabricating a layered impactor with a sample backed up by high hardness materials was developed to overcome the obstacle of the shock-reload experiments in the self-consistent yield strength technique. This method was validate...
2016, 36(4): 497-502.
doi: 10.11883/1001-1455(2016)04-0497-06
Abstract:
The Mei extinction detection system and the self-developed 20 L pulse pneumatic spray multiphase explosion test system were applied to experimentally investigate the explosion parameters of the diethyl ether mist/air mixtures. By regulating pneumatic...
The Mei extinction detection system and the self-developed 20 L pulse pneumatic spray multiphase explosion test system were applied to experimentally investigate the explosion parameters of the diethyl ether mist/air mixtures. By regulating pneumatic...
2016, 36(4): 503-508.
doi: 10.11883/1001-1455(2016)04-0503-06
Abstract:
To solve the problems of bad convergence and to satisfy the strict requirement to initial conditions in the calculation of detonation parameters, a new calculation method was proposed based on the principles of chemical equilibrium and the method of ...
To solve the problems of bad convergence and to satisfy the strict requirement to initial conditions in the calculation of detonation parameters, a new calculation method was proposed based on the principles of chemical equilibrium and the method of ...
2016, 36(4): 509-515.
Abstract:
Both aleatory uncertainty and epistemic uncertainty exist in the initial and boundary conditions when we numerically solve the CFD with sharp discontinuity. In this paper, mixed uncertainty quantification approaches are developed to deal with this si...
Both aleatory uncertainty and epistemic uncertainty exist in the initial and boundary conditions when we numerically solve the CFD with sharp discontinuity. In this paper, mixed uncertainty quantification approaches are developed to deal with this si...
2016, 36(4): 516-524.
doi: 10.11883/1001-1455(2016)04-0516-09
Abstract:
On the basis of the smoothed particle hydrodynamics (SPH) method with fully variable smoothing lengths, the modified Ott-Schnetter SPH method was used to cope with the computational instability in the large density gradient problems. The Holmquist-Jo...
On the basis of the smoothed particle hydrodynamics (SPH) method with fully variable smoothing lengths, the modified Ott-Schnetter SPH method was used to cope with the computational instability in the large density gradient problems. The Holmquist-Jo...
2016, 36(4): 525-531.
doi: 10.11883/1001-1455(2016)04-0525-07
Abstract:
To explore the mitigating mechanism of detonation of a high explosive surrounded by water, experiments of explosion with and without water were carried out in an open-ended steel cylinder. The particle velocity and the displacement of the outer surfa...
To explore the mitigating mechanism of detonation of a high explosive surrounded by water, experiments of explosion with and without water were carried out in an open-ended steel cylinder. The particle velocity and the displacement of the outer surfa...
2016, 36(4): 532-540.
doi: 10.11883/1001-1455(2016)04-0532-09
Abstract:
Under shock loading a specimen undergoes a uniaxial-strain loading process and a lateral release process, both of which have an influence on the residual structure, while the influence of the latter is often underestimated or even totally neglected. ...
Under shock loading a specimen undergoes a uniaxial-strain loading process and a lateral release process, both of which have an influence on the residual structure, while the influence of the latter is often underestimated or even totally neglected. ...
2016, 36(4): 541-547.
doi: 10.11883/1001-1455(2016)04-0541-07
Abstract:
Experiments were carried out and the dynamic response test of the tube wall was conducted simultaneously to characterize the flame and pressure wave propagation generated by methane-air mixture explosion in a shock tube. Our results show that in the ...
Experiments were carried out and the dynamic response test of the tube wall was conducted simultaneously to characterize the flame and pressure wave propagation generated by methane-air mixture explosion in a shock tube. Our results show that in the ...
2016, 36(4): 548-556.
doi: 10.11883/1001-1455(2016)04-0548-09
Abstract:
In this work, based on the determination of the rockfall impact energy and using the dynamic finite element numerical method, we analyzed dynamic responses of large-span shed-tunnels of mountain tunnels under rockfall impact, and investigated the cha...
In this work, based on the determination of the rockfall impact energy and using the dynamic finite element numerical method, we analyzed dynamic responses of large-span shed-tunnels of mountain tunnels under rockfall impact, and investigated the cha...
2016, 36(4): 562-567.
doi: 10.11883/1001-1455(2016)04-0562-06
Abstract:
The experimental system with a closed bomb was employed to discuss the characteristics of 4/7 high-nitrogen solid propellant burning rate enhanced by plasma. The plasma energy transferred into the closed bomb was measured by the utilization efficienc...
The experimental system with a closed bomb was employed to discuss the characteristics of 4/7 high-nitrogen solid propellant burning rate enhanced by plasma. The plasma energy transferred into the closed bomb was measured by the utilization efficienc...
2016, 36(4): 568-572.
doi: 10.11883/1001-1455(2016)04-0568-05
Abstract:
The detonation reaction of CL-20 composite explosive was numerically simulated to analyze its detonation reaction characteristics, and then an experimental setup was designed for measuring the particle velocity at the explosive-window interface. The ...
The detonation reaction of CL-20 composite explosive was numerically simulated to analyze its detonation reaction characteristics, and then an experimental setup was designed for measuring the particle velocity at the explosive-window interface. The ...
2016, 36(4): 573-576.
doi: 10.11883/1001-1455(2016)04-0573-04
Abstract:
In order to investigate the characteristics of the thermobaric explosives, the 25 g charge of thermobaric explosive was ignited in the sealed explosion chamber of 5.8 L volume, and the explosion pressure and temperature were measured and the gas prod...
In order to investigate the characteristics of the thermobaric explosives, the 25 g charge of thermobaric explosive was ignited in the sealed explosion chamber of 5.8 L volume, and the explosion pressure and temperature were measured and the gas prod...
2016, 36(4): 509-515.
doi: 10.11883/1001-1455(2016)04-0509-07
Abstract:
Both aleatory uncertainty and epistemic uncertainty exist in the initial and boundary conditions when we numerically solve the CFD with sharp discontinuity. In this paper, mixed uncertainty quantification approaches are developed to deal with this si...
Both aleatory uncertainty and epistemic uncertainty exist in the initial and boundary conditions when we numerically solve the CFD with sharp discontinuity. In this paper, mixed uncertainty quantification approaches are developed to deal with this si...
2016, 36(4): 557-561.
doi: 10.11883/1001-1455(2016)04-0557-05
Abstract:
Using the line array Doppler pins system(DPS) test technique, the velocity history of the collision region of a tungsten alloy plate was measured, and 16 test points were arranged within the 4-mm-long range in the collision region. The velocity curve...
