2015 Vol. 35, No. 5
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2015, 35(5): 609-616.
doi: 10.11883/1001-1455(2015)05-0609-08
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Abstract:
A high-speed video camera was employed to record the flow field directly. Different explosion energy (discharging voltage) and explosion depth were examined. It is found that the surface jet formed in the narrow tube consists of a smooth upper body a...
A high-speed video camera was employed to record the flow field directly. Different explosion energy (discharging voltage) and explosion depth were examined. It is found that the surface jet formed in the narrow tube consists of a smooth upper body a...
2015, 35(5): 617-624.
doi: 10.11883/1001-1455(2015)05-0617-08
Abstract:
Small-angle oblique and vertical water entry experiments were carried out to observe the supercavitation generated by the blunt bodies with different initial velocities. The development features of the supercavitation in different cases were analyzed...
Small-angle oblique and vertical water entry experiments were carried out to observe the supercavitation generated by the blunt bodies with different initial velocities. The development features of the supercavitation in different cases were analyzed...
2015, 35(5): 625-632.
doi: 10.11883/1001-1455(2015)05-0625-08
Abstract:
A gridless method for simulation of reactive flows involving moving boundaries was investigated based on the linear basis least-squares gridless method. The Euler equations of arbitrary Lagrangian-Eulerian form were employed as governing equations. T...
A gridless method for simulation of reactive flows involving moving boundaries was investigated based on the linear basis least-squares gridless method. The Euler equations of arbitrary Lagrangian-Eulerian form were employed as governing equations. T...
2015, 35(5): 633-640.
doi: 10.11883/1001-1455(2015)05-0633-08
Abstract:
Assuming that sand grains are incompressible, a compaction equation for porous dry sand was derived by applying the dynamic systolic model of a spherical cavity and the generalized Mises strength criterion. Based on the Hugoniot jump condition and th...
Assuming that sand grains are incompressible, a compaction equation for porous dry sand was derived by applying the dynamic systolic model of a spherical cavity and the generalized Mises strength criterion. Based on the Hugoniot jump condition and th...
2015, 35(5): 641-650.
doi: 10.11883/1001-1455(2015)05-0641-10
Abstract:
For studying the chemical mechanism of thermal deflagration of gasoline-air mixture in the confined space, the temperature of the system, the concentration of main components and the generation rate of production in the deflagration process of C1-C4 ...
For studying the chemical mechanism of thermal deflagration of gasoline-air mixture in the confined space, the temperature of the system, the concentration of main components and the generation rate of production in the deflagration process of C1-C4 ...
2015, 35(5): 651-658.
doi: 10.11883/1001-1455(2015)05-0651-08
Abstract:
An experimental system of dynamic caustics was applied to carry out fracture experiments for pre-cracked beam-column specimens. The following dynamic fracture behaviors of the specimens under impact loads were discussed: the crack extension tracks, v...
An experimental system of dynamic caustics was applied to carry out fracture experiments for pre-cracked beam-column specimens. The following dynamic fracture behaviors of the specimens under impact loads were discussed: the crack extension tracks, v...
2015, 35(5): 659-667.
doi: 10.11883/1001-1455(2015)05-0659-09
Abstract:
To confirm and reveal the characteristics of the flow field of the abrasive supercritical CO2 jet, the structure of the jet and the influence of the ambient factors were analyzed through numerical simulation, with the computational fluid dynamics sof...
To confirm and reveal the characteristics of the flow field of the abrasive supercritical CO2 jet, the structure of the jet and the influence of the ambient factors were analyzed through numerical simulation, with the computational fluid dynamics sof...
2015, 35(5): 668-674.
doi: 10.11883/1001-1455(2015)05-0668-07
Abstract:
To research the analytical method and affecting factors of the additional impact load, an integral expression formula was derived for the additional impact load. Three major parameters affecting the additional impact load were obtained. A numerical m...
To research the analytical method and affecting factors of the additional impact load, an integral expression formula was derived for the additional impact load. Three major parameters affecting the additional impact load were obtained. A numerical m...
2015, 35(5): 675-681.
doi: 10.11883/1001-1455(2015)05-0675-07
Abstract:
Experiments were carried out to explore the mechanical properties of the attenuation of shock waves respectively interacted with wooded plates, open and closed cellular foams. Based on the experimental data, the peak overpressure and positive impulse...
Experiments were carried out to explore the mechanical properties of the attenuation of shock waves respectively interacted with wooded plates, open and closed cellular foams. Based on the experimental data, the peak overpressure and positive impulse...
2015, 35(5): 682-688.
doi: 10.11883/1001-1455(2015)05-0682-07
Abstract:
On the basis of the industrial experiment of medium-depth hole caving in Jinchanggouliang Gold Mine, the authers carried out the optimization research of hole pattern blasting parameters. ANSYS/LS-DYNA was used to make several schemes of numerical si...
On the basis of the industrial experiment of medium-depth hole caving in Jinchanggouliang Gold Mine, the authers carried out the optimization research of hole pattern blasting parameters. ANSYS/LS-DYNA was used to make several schemes of numerical si...
2015, 35(5): 689-695.
doi: 10.11883/1001-1455(2015)05-0689-07
Abstract:
Aimed to the safety of an explosive charge in a projectile during penetration, the visco-statistical crack mechanics (Visco-SCRAM) model was applied to numerically calculate the bulk heat of the explosive charge, the heat produced by the friction bet...
Aimed to the safety of an explosive charge in a projectile during penetration, the visco-statistical crack mechanics (Visco-SCRAM) model was applied to numerically calculate the bulk heat of the explosive charge, the heat produced by the friction bet...
2015, 35(5): 696-702.
doi: 10.11883/1001-1455(2015)05-0696-07
Abstract:
The failure mode and mechanism of floating-roof oil storage tanks under the blast impact through the combustible gas explosion were discussed, on the basis of the scaled model tests and the numerical simulations comprehensively. It is found that the ...
The failure mode and mechanism of floating-roof oil storage tanks under the blast impact through the combustible gas explosion were discussed, on the basis of the scaled model tests and the numerical simulations comprehensively. It is found that the ...
2015, 35(5): 703-710.
doi: 10.11883/1001-1455(2015)05-0703-08
Abstract:
The interaction between explosion waves in soil and underground structures is the theory basis of underground protective structures design. Based on the tests, the rational media dynamic constitutive relationships were introduced and the wave propaga...
The interaction between explosion waves in soil and underground structures is the theory basis of underground protective structures design. Based on the tests, the rational media dynamic constitutive relationships were introduced and the wave propaga...
2015, 35(5): 711-716.
doi: 10.11883/1001-1455(2015)05-0711-06
Abstract:
Experiments and numerical simulations were carried out to explore a mechanical method for discarding the sabot of a high-velocity projectile by a laminated wood target. First, the feasibility and parametric regular pattern of an orthotropic material ...
Experiments and numerical simulations were carried out to explore a mechanical method for discarding the sabot of a high-velocity projectile by a laminated wood target. First, the feasibility and parametric regular pattern of an orthotropic material ...
2015, 35(5): 717-722.
doi: 10.11883/1001-1455(2015)05-0717-06
Abstract:
Reinforcing design for the opening on a certain experiment-used spherical explosive containment vessel was carried out referring to the pressure vessel code GB150-2011. The relationships between the effective plastic strain around the opening and the...
Reinforcing design for the opening on a certain experiment-used spherical explosive containment vessel was carried out referring to the pressure vessel code GB150-2011. The relationships between the effective plastic strain around the opening and the...
2015, 35(5): 723-728.
doi: 10.11883/1001-1455(2015)05-0723-06
Abstract:
A new discrete rod warhead named profiled rod warhead was proposed to improve the damage aftereffect, and the experimental research on detonation-driven profiled rod dispersing was employed. The initial velocity of the rods were obtained. The dispers...
A new discrete rod warhead named profiled rod warhead was proposed to improve the damage aftereffect, and the experimental research on detonation-driven profiled rod dispersing was employed. The initial velocity of the rods were obtained. The dispers...
2015, 35(5): 729-734.
doi: 10.11883/1001-1455(2015)05-0729-06
Abstract:
To research the influence of the T-shaped branch structure during the explosions of gasoline-air mixture in pipelines, the explosion wave overpressure of gasoline-air mixture explosion in the T-shaped branch pipeline and the straight pipeline at diff...
To research the influence of the T-shaped branch structure during the explosions of gasoline-air mixture in pipelines, the explosion wave overpressure of gasoline-air mixture explosion in the T-shaped branch pipeline and the straight pipeline at diff...
2015, 35(5): 735-740.
doi: 10.11883/1001-1455(2015)05-0735-06
Abstract:
To investigate the characteristics of rocket launching noise and the acoustic distribution around the nozzle, the gas jet noise was studied experimentally and numerically. Three main components (turbulent mixing noise, screech tone and broadband shoc...
To investigate the characteristics of rocket launching noise and the acoustic distribution around the nozzle, the gas jet noise was studied experimentally and numerically. Three main components (turbulent mixing noise, screech tone and broadband shoc...
2015, 35(5): 741-746.
doi: 10.11883/1001-1455(2015)05-0741-06
Abstract:
The basic principle of regression analysis was considered for the prediction formula of blasting vibration velocity. On the basis of the considered principle, an opinion was put forward that certain reliability indexes should be chosen according to t...
The basic principle of regression analysis was considered for the prediction formula of blasting vibration velocity. On the basis of the considered principle, an opinion was put forward that certain reliability indexes should be chosen according to t...
2015, 35(5): 747-752.
doi: 10.11883/1001-1455(2015)05-0747-06
Abstract:
Flammability limits for the binary mixtures of CH4/N2 and CH4/CO2 were measured, and the ternary mixtures of CH4/N2/CO2 with three different diluent volume ratios were studied. A method based on the adiabatic flame temperature was introduced to estim...
Flammability limits for the binary mixtures of CH4/N2 and CH4/CO2 were measured, and the ternary mixtures of CH4/N2/CO2 with three different diluent volume ratios were studied. A method based on the adiabatic flame temperature was introduced to estim...
2015, 35(5): 753-757.
doi: 10.11883/1001-1455(2015)05-0753-05
Abstract:
Explosion characteristics of dimethyl ether (DME)/air and DME/air/ argon (Ar) mixtures were studied by using a 20-L spherical explosion-containment vessel under different initial conditions. This paper analyzed the effects of different initial condit...
Explosion characteristics of dimethyl ether (DME)/air and DME/air/ argon (Ar) mixtures were studied by using a 20-L spherical explosion-containment vessel under different initial conditions. This paper analyzed the effects of different initial condit...
2015, 35(5): 758-762.
doi: 10.11883/1001-1455(2015)05-0758-05
Abstract:
There is an oscillation signal superposition on measured acceleration signals during the process of penetrating multilayer hard targets, which can cause a misjudgement of the target layer number. To overcome the above problem, a time-frequency analys...
There is an oscillation signal superposition on measured acceleration signals during the process of penetrating multilayer hard targets, which can cause a misjudgement of the target layer number. To overcome the above problem, a time-frequency analys...
2015, 35(5): 763-767.
doi: 10.11883/1001-1455(2015)05-0763-05
Abstract:
Based on the Gurney velocity formula for cylindrical shells with finite length, the average strain rate was estimated by the average radius of the shell. And by taking into account the differences between the shear fracture surface length of the shel...
Based on the Gurney velocity formula for cylindrical shells with finite length, the average strain rate was estimated by the average radius of the shell. And by taking into account the differences between the shear fracture surface length of the shel...
