2017 Vol. 37, No. 6
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2017, 37(6): 893-900.
doi: 10.11883/1001-1455(2017)06-0893-08
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Abstract:
In the present study, sampling technique was used to deal with the input parameter uncertainty in the numerical simulation of detonation CFD(computational fluid dynamics). Then the deterministic detonation CFD program was constructed with different i...
In the present study, sampling technique was used to deal with the input parameter uncertainty in the numerical simulation of detonation CFD(computational fluid dynamics). Then the deterministic detonation CFD program was constructed with different i...
2017, 37(6): 901-906.
doi: 10.11883/1001-1455(2017)06-0901-06
Abstract:
As the strain growth poses a potential hazard for the safety of an explosion vessel, it is of great importance to figure out its limit. The experiment, which was carried out in a spherical explosion vessel, shows that the maximum strain growth factor...
As the strain growth poses a potential hazard for the safety of an explosion vessel, it is of great importance to figure out its limit. The experiment, which was carried out in a spherical explosion vessel, shows that the maximum strain growth factor...
2017, 37(6): 907-914.
doi: 10.11883/1001-1455(2017)06-0907-08
Abstract:
In combination with the measured data of the blasting vibration, the total energy, the frequency band energy, and the PPV of each band of the blasting vibration signal with different numbers of free surfaces were obtained using the wavelet analysis. ...
In combination with the measured data of the blasting vibration, the total energy, the frequency band energy, and the PPV of each band of the blasting vibration signal with different numbers of free surfaces were obtained using the wavelet analysis. ...
2017, 37(6): 915-923.
doi: 10.11883/1001-1455(2017)06-0915-09
Abstract:
In the present work, shock initiation experiments on CL-20, CL-20/NTO and CL-20/FOX-7 mixed explosives were performed to investigate the shock initiation characteristics of Hexanitro-hexaazaisowurtzitane (CL-20) based explosives. An explosive driven ...
In the present work, shock initiation experiments on CL-20, CL-20/NTO and CL-20/FOX-7 mixed explosives were performed to investigate the shock initiation characteristics of Hexanitro-hexaazaisowurtzitane (CL-20) based explosives. An explosive driven ...
2017, 37(6): 924-930.
doi: 10.11883/1001-1455(2017)06-0924-07
Abstract:
In this work, lower explosion limits of methane, lycopodium dust and methane-lycopodium dust hybrid mixtures were determined under the same testing conditions based on the 20 L sphere vessel. The measured results were compared with the values calcula...
In this work, lower explosion limits of methane, lycopodium dust and methane-lycopodium dust hybrid mixtures were determined under the same testing conditions based on the 20 L sphere vessel. The measured results were compared with the values calcula...
2017, 37(6): 931-938.
doi: 10.11883/1001-1455(2017)06-0931-08
Abstract:
Abundant underground rock information can be obtained through the analysis of time-frequency of explosive seismic wave signals, which lays a foundation for further research on characteristics of explosive seismic waves. In this study, based on the no...
Abundant underground rock information can be obtained through the analysis of time-frequency of explosive seismic wave signals, which lays a foundation for further research on characteristics of explosive seismic waves. In this study, based on the no...
2017, 37(6): 939-945.
doi: 10.11883/1001-1455(2017)06-0939-07
Abstract:
In this work, aiming to the prediction speed and accuracy, we established a random forest model for residential structure damage induced by blast vibration identification on the basis of the random forest (RF) theory. Twelve indexes, i.e. peak partic...
In this work, aiming to the prediction speed and accuracy, we established a random forest model for residential structure damage induced by blast vibration identification on the basis of the random forest (RF) theory. Twelve indexes, i.e. peak partic...
2017, 37(6): 1001-1009.
doi: 10.11883/1001-1455(2017)06-1001-09
Abstract:
In this work, in view of the design issues concerning the strength of the explosion testing pool, we simulated numerically the shock wave propagation in water and structural dynamic responses of the testing pool subjected to a 10 kg TNT explosion imp...
In this work, in view of the design issues concerning the strength of the explosion testing pool, we simulated numerically the shock wave propagation in water and structural dynamic responses of the testing pool subjected to a 10 kg TNT explosion imp...
2017, 37(6): 1010-1016.
doi: 10.11883/1001-1455(2017)06-1010-07
Abstract:
In the present study, we loaded smooth and notched cylindrical specimens of magnesium alloy MB2 under quasi-static and dynamic tension states using the material testing machine and split Hopkinson tension bar (SHTB), to characterize the alloy's tensi...
In the present study, we loaded smooth and notched cylindrical specimens of magnesium alloy MB2 under quasi-static and dynamic tension states using the material testing machine and split Hopkinson tension bar (SHTB), to characterize the alloy's tensi...
2017, 37(6): 1017-1022.
doi: 10.11883/1001-1455(2017)06-1017-06
Abstract:
The present study investigates the growth and variation of the amplification effect in the propagation of the blasting vibration velocity in step topography. The results indicate that the blast vibration elevation amplification effect on a single ste...
The present study investigates the growth and variation of the amplification effect in the propagation of the blasting vibration velocity in step topography. The results indicate that the blast vibration elevation amplification effect on a single ste...
2017, 37(6): 1023-1030.
doi: 10.11883/1001-1455(2017)06-1023-08
Abstract:
In this study the transfer functions of the mechanical quantities (i.e. the particle velocity, the particle displacement, the stress and the strain, etc.) at different propagation distances were analytically presented based on the solutions of the li...
In this study the transfer functions of the mechanical quantities (i.e. the particle velocity, the particle displacement, the stress and the strain, etc.) at different propagation distances were analytically presented based on the solutions of the li...
2017, 37(6): 1031-1038.
doi: 10.11883/1001-1455(2017)06-1031-08
Abstract:
In the present work, to address the premature explosion for the detonating network, we designed a new type of irreversible detonation explosive diode and studied the mechanism and limiting factors about the explosive diode in transmitting the positiv...
In the present work, to address the premature explosion for the detonating network, we designed a new type of irreversible detonation explosive diode and studied the mechanism and limiting factors about the explosive diode in transmitting the positiv...
2017, 37(6): 1039-1045.
doi: 10.11883/1001-1455(2017)06-1039-07
Abstract:
To address the issue of the increase of the fragment velocity of an eccentric initiation warhead, we put forward the view that this increase was caused by the Mach overpressure formed by the detonation wave collision. We used the AUTODYN software to ...
To address the issue of the increase of the fragment velocity of an eccentric initiation warhead, we put forward the view that this increase was caused by the Mach overpressure formed by the detonation wave collision. We used the AUTODYN software to ...
2017, 37(6): 1046-1050.
doi: 10.11883/1001-1455(2017)06-1046-05
Abstract:
The mechanical properties of polyetrafluoroethylene (PTFE), which is being used increasingly in diverse applications owing to its many attractive properties, are important for applications involving either high-velocity impact or blast loading at ver...
The mechanical properties of polyetrafluoroethylene (PTFE), which is being used increasingly in diverse applications owing to its many attractive properties, are important for applications involving either high-velocity impact or blast loading at ver...
Dynamic correction and compensation method about the measuring curve of shockwave reflected pressure
2017, 37(6): 1051-1056.
doi: 10.11883/1001-1455(2017)06-1051-06
Abstract:
In the present work, to obtain the accurate measuring curve of explosive shockwave reflected pressure, we analyzed the three factors that influence the peak value, i.e. the band width of the pressure test system, the pressure test method, and the len...
In the present work, to obtain the accurate measuring curve of explosive shockwave reflected pressure, we analyzed the three factors that influence the peak value, i.e. the band width of the pressure test system, the pressure test method, and the len...
2017, 37(6): 1057-1064.
doi: 10.11883/1001-1455(2017)06-1057-08
Abstract:
In order to improve the design and safety assessment of the reliability of blast-resistant structures, we studied the simplified calculation of the shock wave loads caused by HE explosions in straight tunnel based on the theoretical calculation and n...
In order to improve the design and safety assessment of the reliability of blast-resistant structures, we studied the simplified calculation of the shock wave loads caused by HE explosions in straight tunnel based on the theoretical calculation and n...
2017, 37(6): 1065-1071.
doi: 10.11883/1001-1455(2017)06-1065-07
Abstract:
Internal short-circuit arcing explosion in a medium-voltage (MV) switchgear poses a serious hazard to the safety of equipments, buildings and personnel. In the present work, to find out an appropriate method to calculate the pressure effect resulting...
Internal short-circuit arcing explosion in a medium-voltage (MV) switchgear poses a serious hazard to the safety of equipments, buildings and personnel. In the present work, to find out an appropriate method to calculate the pressure effect resulting...
2017, 37(6): 1072-1079.
doi: 10.11883/1001-1455(2017)06-1072-08
Abstract:
In the present study, we designed the electromagnetic and explosive driving expanding ring/cylinder experiments and investigated the expanding fracture characteristics of oxygen-free high-conductivity copper (OFHC) in consideration of the conception ...
In the present study, we designed the electromagnetic and explosive driving expanding ring/cylinder experiments and investigated the expanding fracture characteristics of oxygen-free high-conductivity copper (OFHC) in consideration of the conception ...
2017, 37(6): 1080-1086.
doi: 10.11883/1001-1455(2017)06-1080-07
Abstract:
In this work, we investigated a study of the mechanism governing the internal blast in a warship cabin and the technique for preventing it. We developed a multi-cabin structure and carried out experiments with/without water were on the cabin to recor...
In this work, we investigated a study of the mechanism governing the internal blast in a warship cabin and the technique for preventing it. We developed a multi-cabin structure and carried out experiments with/without water were on the cabin to recor...
2017, 37(6): 1087-1092.
doi: 10.11883/1001-1455(2017)06-1087-06
Abstract:
In this work we combined the powerful computing capabilities of Matlab programs combined with VB friendly interface and developed the forecast system for blasting vibrational velocity peak using ActiveX automation technologies and BP neural network a...
In this work we combined the powerful computing capabilities of Matlab programs combined with VB friendly interface and developed the forecast system for blasting vibrational velocity peak using ActiveX automation technologies and BP neural network a...
2017, 37(6): 1093-1100.
doi: 10.11883/1001-1455(2017)06-1093-08
Abstract:
In this study a theoretical model was established to predict the interface defeat/penetration transition velocity of a ceramic armor impacted by a long-rod projectile. Predications of the transition velocity were obtained by measuring the stress insi...
In this study a theoretical model was established to predict the interface defeat/penetration transition velocity of a ceramic armor impacted by a long-rod projectile. Predications of the transition velocity were obtained by measuring the stress insi...
2017, 37(6): 1101-1106.
doi: 10.11883/1001-1455(2017)06-1101-06
Abstract:
Based on the virtual origin theory, the shock wave reflection theory and the jet interference theory, the theoretical model for the jet penetrating a liquid-filled unit cell structure was improved and perfected in consideration of the liquid's spray ...
Based on the virtual origin theory, the shock wave reflection theory and the jet interference theory, the theoretical model for the jet penetrating a liquid-filled unit cell structure was improved and perfected in consideration of the liquid's spray ...
2017, 37(6): 1107-1112.
doi: 10.11883/1001-1455(2017)06-1107-06
Abstract:
In this study we carried out an static overall tensile experiment at room temperature and a transient blast experiment under ultra high pressure to investigate the structural strength of glass fiber reinforced (GFR) composite cartridge of CTA gun wit...
In this study we carried out an static overall tensile experiment at room temperature and a transient blast experiment under ultra high pressure to investigate the structural strength of glass fiber reinforced (GFR) composite cartridge of CTA gun wit...
2017, 37(6): 946-951.
doi: 10.11883/1001-1455(2017)06-0946-06
Abstract:
In this work we investigated the influence of the constrained layer, composed of metal aluminum and polyurethane foam, on the expanding deformation of a metal cylindrical shell using numerical simulation, obtained the velocity and displacement profil...
In this work we investigated the influence of the constrained layer, composed of metal aluminum and polyurethane foam, on the expanding deformation of a metal cylindrical shell using numerical simulation, obtained the velocity and displacement profil...
2017, 37(6): 952-958.
doi: 10.11883/1001-1455(2017)06-0952-07
Abstract:
This paper studied the interaction mechanism between the dynamic crack and the precast static crack (horizontal angle for 90° and 150°) under the action of explosion stress and the dynamic behavior of crack propagation using the digital laser dynamic...
This paper studied the interaction mechanism between the dynamic crack and the precast static crack (horizontal angle for 90° and 150°) under the action of explosion stress and the dynamic behavior of crack propagation using the digital laser dynamic...
2017, 37(6): 959-965.
doi: 10.11883/1001-1455(2017)06-0959-07
Abstract:
In this study we carried out ballistic tests to explore the residual characteristics of moderately thick water-backed steel plates penetrated by high-velocity fragments. Damage modes of projectiles as well as targets were analyzed. We compared the ve...
In this study we carried out ballistic tests to explore the residual characteristics of moderately thick water-backed steel plates penetrated by high-velocity fragments. Damage modes of projectiles as well as targets were analyzed. We compared the ve...
2017, 37(6): 966-975.
doi: 10.11883/1001-1455(2017)06-0966-10
Abstract:
In this work, in view of the widely understood idea that topography and geological conditions are usually complicated and have a critical influence on the level of blast induced ground vibrations, we analyzed the effect of topography on the path thro...
In this work, in view of the widely understood idea that topography and geological conditions are usually complicated and have a critical influence on the level of blast induced ground vibrations, we analyzed the effect of topography on the path thro...
2017, 37(6): 976-981.
doi: 10.11883/1001-1455(2017)06-0976-06
Abstract:
In the present work we developed a strain wire measurement technique that can be used to measure the dynamic deformation process of cylindrical explosion vessels. The strain wires, compactly fixed along the circumference of the explosion vessels, ext...
In the present work we developed a strain wire measurement technique that can be used to measure the dynamic deformation process of cylindrical explosion vessels. The strain wires, compactly fixed along the circumference of the explosion vessels, ext...
2017, 37(6): 982-989.
doi: 10.11883/1001-1455(2017)06-0982-08
Abstract:
In this study, we investigated the dynamic stress concentration factor of single circular inclusion shallow buried in surface softlayered half space impacted by steady SH-wave using the complex variable function method and the wave function expansion...
In this study, we investigated the dynamic stress concentration factor of single circular inclusion shallow buried in surface softlayered half space impacted by steady SH-wave using the complex variable function method and the wave function expansion...
2017, 37(6): 990-1000.
doi: 10.11883/1001-1455(2017)06-0990-11
Abstract:
Based on the kinetic theory of granular flow (pseudo-fluid model), a new Smoothed Particle Hydrodynamics (SPH) algorithm suited for hyper velocity collision was presented in this paper. The damaged debris of the hyper velocity impact was equated with...
Based on the kinetic theory of granular flow (pseudo-fluid model), a new Smoothed Particle Hydrodynamics (SPH) algorithm suited for hyper velocity collision was presented in this paper. The damaged debris of the hyper velocity impact was equated with...
