2015 Vol. 35, No. 3
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2015, 35(3): 289-295.
doi: 10.11883/1001-1455-(2015)03-0289-07
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Abstract:
On the basis of multi-group radiation hydrodynamics method of fireball radiation in strong explosion, operator splitting method is used to split the equations into convection items and source items, which are split into radiation groups due to the eq...
On the basis of multi-group radiation hydrodynamics method of fireball radiation in strong explosion, operator splitting method is used to split the equations into convection items and source items, which are split into radiation groups due to the eq...
2015, 35(3): 296-303.
doi: 10.11883/1001-1455-(2015)03-0296-08
Abstract:
TiNi tubes with and without lateral constraint subjected to radial impact were investigated experimentally for the purpose of developing repeatedly used energy absorption devices.By using a modified SHPB apparatus and wave separation technique, the s...
TiNi tubes with and without lateral constraint subjected to radial impact were investigated experimentally for the purpose of developing repeatedly used energy absorption devices.By using a modified SHPB apparatus and wave separation technique, the s...
2015, 35(3): 304-311.
doi: 10.11883/1001-1455-(2015)03-0304-08
Abstract:
A new experimental system of digital laser dynamic caustics was used and the distribution of dynamic stress field around empty holes and the influence of empty holes upon the main cracks expanding under the blasting loading were studied.Experimental ...
A new experimental system of digital laser dynamic caustics was used and the distribution of dynamic stress field around empty holes and the influence of empty holes upon the main cracks expanding under the blasting loading were studied.Experimental ...
2015, 35(3): 312-319.
doi: 10.11883/1001-1455-(2015)03-0312-08
Abstract:
Several groups of compression tests at different strain rates(10-3~3 000 s-1)are carried out for MDYB-3 polymethyl methacrylate.Yield stress in the quasi-static tests and peak stress in the dynamic tests are obtained.Compression tests are performed a...
Several groups of compression tests at different strain rates(10-3~3 000 s-1)are carried out for MDYB-3 polymethyl methacrylate.Yield stress in the quasi-static tests and peak stress in the dynamic tests are obtained.Compression tests are performed a...
2015, 35(3): 320-325.
doi: 10.11883/1001-1455-(2015)03-0320-06
Abstract:
For investigating bubble pulse of small scale charge exploded under deepwater in the laboratory, an experiment platform of charge exploded under simulated deepwater is established by means of adding atmospheric pressure over the water surface to incr...
For investigating bubble pulse of small scale charge exploded under deepwater in the laboratory, an experiment platform of charge exploded under simulated deepwater is established by means of adding atmospheric pressure over the water surface to incr...
2015, 35(3): 326-334.
doi: 10.11883/1001-1455-(2015)03-0326-09
Abstract:
A new interface treating method is presented for the compressible-incompressible gas-water multi-phase flow.The Riemann problem is constructed at the compressible gas-water interface, and then solved according to the hypothesis that the sound speed t...
A new interface treating method is presented for the compressible-incompressible gas-water multi-phase flow.The Riemann problem is constructed at the compressible gas-water interface, and then solved according to the hypothesis that the sound speed t...
2015, 35(3): 335-342.
doi: 10.11883/1001-1455-(2015)03-0335-08
Abstract:
Flight trajectory experiments were conducted with⌀60 mm diameter EFP warhead in order to investigate the effect of eccentric initiation on the flight characteristics of EFP.The results indicate that the projectile flight stability with perforations n...
Flight trajectory experiments were conducted with⌀60 mm diameter EFP warhead in order to investigate the effect of eccentric initiation on the flight characteristics of EFP.The results indicate that the projectile flight stability with perforations n...
2015, 35(3): 343-349.
doi: 10.11883/1001-1455-(2015)03-0343-07
Abstract:
Aiming at rockburst geological disaster induced by discontinuity such as faults or joints in deep lay rock mass, numerical model is presented according to distributional characteristics and geometrical aspects of potential seismic faults in undergrou...
Aiming at rockburst geological disaster induced by discontinuity such as faults or joints in deep lay rock mass, numerical model is presented according to distributional characteristics and geometrical aspects of potential seismic faults in undergrou...
2015, 35(3): 350-358.
doi: 10.11883/1001-1455(2015)03-0350-09
Abstract:
To meet higher security requirements for blasting vibration from urban tunnel excavation under dense buildings, a new blasting technology was proposed and the corresponding method for obtaining parameters was explored.The proposed blasting technology...
To meet higher security requirements for blasting vibration from urban tunnel excavation under dense buildings, a new blasting technology was proposed and the corresponding method for obtaining parameters was explored.The proposed blasting technology...
2015, 35(3): 359-365.
doi: 10.11883/1001-1455(2015)03-0359-07
Abstract:
Aimed at the selection problem of priming parameters of two-point explosion in concrete, a method for optimizing the parameters was proposed based on the gray theory.The experimental program was developed by the orthogonal experimental design techniq...
Aimed at the selection problem of priming parameters of two-point explosion in concrete, a method for optimizing the parameters was proposed based on the gray theory.The experimental program was developed by the orthogonal experimental design techniq...
2015, 35(3): 366-371.
doi: 10.11883/1001-1455(2015)03-0366-07
Abstract:
Due to the huge differences in pressure and duration of dynamic loading process and quasistatic loading process in high-pressure water jet impacting HTPB propellant, possible ignition modes were prejudged on the basis of the calculation of water hamm...
Due to the huge differences in pressure and duration of dynamic loading process and quasistatic loading process in high-pressure water jet impacting HTPB propellant, possible ignition modes were prejudged on the basis of the calculation of water hamm...
2015, 35(3): 372-379.
doi: 10.11883/1001-1455-(2015)03-0372-08
Abstract:
Experiments were conducted to investigate the effect of conveying airflow characteristics on flame structure for the electric spark ignition in air flow of lycopodium dust.Hot wire anemometers were used to measure the distributions of velocity and tu...
Experiments were conducted to investigate the effect of conveying airflow characteristics on flame structure for the electric spark ignition in air flow of lycopodium dust.Hot wire anemometers were used to measure the distributions of velocity and tu...
2015, 35(3): 380-385.
doi: 10.11883/1001-1455-(2015)03-0380-06
Abstract:
The square tube with pre-designed corrugations shape is presented and the folding angles formula of the corrugated tubes is established in this study base on geometrical relationship.Buckling modes and energy absorption of square tube and six kinds o...
The square tube with pre-designed corrugations shape is presented and the folding angles formula of the corrugated tubes is established in this study base on geometrical relationship.Buckling modes and energy absorption of square tube and six kinds o...
2015, 35(3): 386-392.
doi: 10.11883/1001-1455(2015)03-0386-07
Abstract:
Monolithic and three-layered plates were normally impacted by hemispherically-nosed projectiles.The residual velocity-the initial velocity curves of the projectiles and ballisitic limit velocities were constructed.The penetration process of metal pla...
Monolithic and three-layered plates were normally impacted by hemispherically-nosed projectiles.The residual velocity-the initial velocity curves of the projectiles and ballisitic limit velocities were constructed.The penetration process of metal pla...
2015, 35(3): 393-400.
doi: 10.11883/1001-1455-(2015)03-0393-08
Abstract:
Gas explosion is the leading accident in underground coal mining in China.In order to prevent mine gas explosion effectively, methane, the dominant sector of mine gases, was taken as experimental medium.A quartz tube test system, in which the ratio o...
Gas explosion is the leading accident in underground coal mining in China.In order to prevent mine gas explosion effectively, methane, the dominant sector of mine gases, was taken as experimental medium.A quartz tube test system, in which the ratio o...
2015, 35(3): 401-408.
doi: 10.11883/1001-1455-(2015)03-0401-08
Abstract:
The model of circular honeycomb structures randomly filled with rigid inclusions which keeps the relative density as a constant is developed.And then the effects of impact velocity and packing ratio on the deformation modes, dynamic plateau stress an...
The model of circular honeycomb structures randomly filled with rigid inclusions which keeps the relative density as a constant is developed.And then the effects of impact velocity and packing ratio on the deformation modes, dynamic plateau stress an...
2015, 35(3): 409-415.
doi: 10.11883/1001-1455-(2015)03-0409-07
Abstract:
In order to analyze influences of multistage divergent chamber structure of combustion light gas gun on the combustion characteristics of hydrogen-oxygen mixed gas, the propellant combustion launching process in the multistage divergent chamber and s...
In order to analyze influences of multistage divergent chamber structure of combustion light gas gun on the combustion characteristics of hydrogen-oxygen mixed gas, the propellant combustion launching process in the multistage divergent chamber and s...
2015, 35(3): 416-422.
doi: 10.11883/1001-1455-(2015)03-0416-07
Abstract:
As the metal fragments of penetration can not be effectively simulated by finite element method(FEM), a three-dimensional(3D)calculation code was developed to simulate penetration problem of multi-layered spaced metal plates based on theory of 3D FE-...
As the metal fragments of penetration can not be effectively simulated by finite element method(FEM), a three-dimensional(3D)calculation code was developed to simulate penetration problem of multi-layered spaced metal plates based on theory of 3D FE-...
2015, 35(3): 423-427.
doi: 10.11883/1001-1455(2015)03-0423-05
Abstract:
The mixing induced by Richtmyer-Meshkov instability under lower and high compression ratios is studied by using buoyancy-drag model.It is found by the comparison between the experimental and theoretical analytic results that in order to achieve good ...
The mixing induced by Richtmyer-Meshkov instability under lower and high compression ratios is studied by using buoyancy-drag model.It is found by the comparison between the experimental and theoretical analytic results that in order to achieve good ...
2015, 35(3): 428-436.
doi: 10.11883/1001-1455-(2015)03-0428-09
Abstract:
In view of the fact that the jointed rockmass contains both macroscopic flaws such as the joint and crack and the mesoscopic flaws such as the microcrack and microhole, the viewpoint that the above two kinds of flaws should be considered at the same ...
In view of the fact that the jointed rockmass contains both macroscopic flaws such as the joint and crack and the mesoscopic flaws such as the microcrack and microhole, the viewpoint that the above two kinds of flaws should be considered at the same ...
2015, 35(3): 437-441.
doi: 10.11883/1001-1455(2015)03-0437-05
Abstract:
Air blast experiments of small-scale charges were conducted in an explosion containment vessel.The shock wave velocity was measured by sensor series.And the approximately theoretic peak pressure was determined from the shock wave velocity by using th...
Air blast experiments of small-scale charges were conducted in an explosion containment vessel.The shock wave velocity was measured by sensor series.And the approximately theoretic peak pressure was determined from the shock wave velocity by using th...
2015, 35(3): 442-448.
doi: 10.11883/1001-1455(2015)03-0442-07
Abstract:
On the basis of conservation of mass and momentum, a mechanical model was established for high-pressure water jets impinging on coal.By using this model, the mechanical characteristics were analyzed for the intact water jet, cracked water jet, and th...
On the basis of conservation of mass and momentum, a mechanical model was established for high-pressure water jets impinging on coal.By using this model, the mechanical characteristics were analyzed for the intact water jet, cracked water jet, and th...
