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Safety control for powder compaction of initiating explosive device 被引量:2
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作者 刘丰林 《Journal of Chongqing University》 CAS 2006年第1期16-18,共3页
Powder compaction is one of the most crucial processes in initiating explosive device manufacturing. The quality of powder compaction may influence the performances of product directly. Traditional powder compaction m... Powder compaction is one of the most crucial processes in initiating explosive device manufacturing. The quality of powder compaction may influence the performances of product directly. Traditional powder compaction mainly makes use of manual gravitational spiral loading machine or lever loading machine. Potential accident by the strike in powder compaction of initiating explosive device could risk life, property and the environment. To prevent this risk, automatic control system and control strategy can be used to guarantee no strike in pressing process. The scope of this paper is to analyze and review the control strategy for powder compact and discuss the experimental results for the application of the proposed strategy. 展开更多
关键词 safety control powder compaction initiating explosive device
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Field test and probabilistic analysis of irregular steel debris casualty risks from a person-borne improvised explosive device
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作者 Piotr W.Sielicki Mark G.Stewart +5 位作者 Tomasz Gajewski MichałMalendowski Piotr Peksa Hasan Al-Rifaie Robert Studzinski Wojciech Sumelka 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2021年第6期1852-1863,共12页
Person-borne improvised explosive devices(PBIEDs)are often used in terrorist attacks in Western countries.This study aims to predict the trajectories of PBIED fragments and the subsequent safety risks for people expos... Person-borne improvised explosive devices(PBIEDs)are often used in terrorist attacks in Western countries.This study aims to predict the trajectories of PBIED fragments and the subsequent safety risks for people exposed to this hazard.An explosive field test with a typical PBIED composed of a plastic explosive charge and steel nut enhancements was performed to record initial fragment behaviour,including positions,velocity,and trajectory angles.These data were used to predict the full trajectory of PBIED fragments using a probabilistic analysis.In the probabilistic analyses a probability of fatality or serious injury was computed.Based on the results presented,many practical conclusions can be drawn,for instance,regarding safe evacuation distances if a person were exposed to a suspected PBIED. 展开更多
关键词 Flying fragments Human safety Person-borne improvised explosive device experiment Probabilistic analysis
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Application of equivalent information method to high reliability assessment of initiating explosive devices
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作者 张天飞 董海平 蔡瑞娇 《Journal of Beijing Institute of Technology》 EI CAS 2012年第1期31-34,共4页
The amount of information required for reliability assessment of success/failure products is defined and the formula of equivalent information method is deduced. Based on the formula, a method for assessing reliabilit... The amount of information required for reliability assessment of success/failure products is defined and the formula of equivalent information method is deduced. Based on the formula, a method for assessing reliability of initiating explosive devices with small sample size is established. Compared with the assessment method for devices with large sample size, the new method is correct and feasible and can be used to assess the reliability of initiating explosive devices with high reliability requirements. 展开更多
关键词 success/failure product initiating explosive devices RELIABILITY equivalent information
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Concept of Application of Nuclear Explosive Devices in a Space-Rocket Complex to Protect the Earth against AsteroidaI-Cometary Danger
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作者 Vladimir Grigoryevich Degtyar Victor Alexandrovich Volkov Sergey Timofeyevich Kalashnikov 《Journal of Physical Science and Application》 2011年第3期188-195,共8页
Herein an estimation is given to the efficiency of nuclear explosive devices in a space-rocket complex to withdraw Hazardous Space Objects (HS0)-asteroids and cometary nuclei from the trajectories leading to their d... Herein an estimation is given to the efficiency of nuclear explosive devices in a space-rocket complex to withdraw Hazardous Space Objects (HS0)-asteroids and cometary nuclei from the trajectories leading to their dangerous entry to the atmosphere and falling to the Earth. A conceptual choice of parameters and schemes of application of nuclear explosive devices in impact modules of space-rocket complexes to ensure asteroidal-cometary safety was made. 展开更多
关键词 Space-rocket complex to protect the Earth asteroidal-cometary danger space object (SO) hazardous space object (HSO) nuclear explosive device (NED).
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Experimental and numerical investigation on alternatives to sandy gravel
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作者 V.Denefeld H.Aurich 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第1期130-141,共12页
The NATO agreement STANAG 4569 defines the protection levels for the occupants of logistic and light armored vehicle.The Allied Engineering Publication,AEP-55,Volume 2 document outlines the test conditions for underbe... The NATO agreement STANAG 4569 defines the protection levels for the occupants of logistic and light armored vehicle.The Allied Engineering Publication,AEP-55,Volume 2 document outlines the test conditions for underbelly improvised explosive device(IEDs),which must be buried in water-saturated sandy gravel.The use of sandy gravel has some drawbacks,for instance reproducibility,time consumption,and cost.This paper focuses on the investigation of four alternatives to sandy gravel,which could produce similar specific and cumulative impulses:a concrete pot filled with water,a concrete pot filled with quartz sand,a steel pot without filling and a concrete pot filled with glass spheres(diameter 200μm—300μm)and different water contents.The impulses are measured with a ring technology developed at the Fraunhofer EMI.A numerical soil model based on the work of Marrs,2014 and Fi serov a,2006 and considering the soil moisture was used to simulate the experiments with glass spheres at different water contents,showing much better agreement with the experiments than the classical Laine&Sandvik model,even for high saturation levels.These results can be used to create new test conditions at original scale that are more cost-effective,more reproducible and simpler to manage in comparison to the current tests carried out with STANAG sandy gravel. 展开更多
关键词 Improvised explosive device(IED) Specific impulse Momentum transfer Sandy gravel Glass spheres Numerical model Soil moisture
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Design of multi-channel equivalent system for IED based on Gigabit Ethernet transmission 被引量:1
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作者 CHENG Nai-peng LI Jin-ming +2 位作者 HOU Tian-xi CHENG Ya-li MA Lin 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2019年第1期21-27,共7页
To test the pulse signal of initiating explosive device (IED) in an aircraft,a multi-channel equivalent system for IED based on Gigabit Ethernet transmission is designed according to its electrical parameters. The out... To test the pulse signal of initiating explosive device (IED) in an aircraft,a multi-channel equivalent system for IED based on Gigabit Ethernet transmission is designed according to its electrical parameters. The output voltage of multi-channel equivalent circuit is converted by analog-to-digital converter (ADC). Then the validity of the converted signal is judged by field programmable gate array (FPGA). Finally,it is transmitted the host computer through Gigabit Ethernet for waveform displaying. Compared with the traditional equivalent equipment of IED,the designed system here can not only test the validity of the pulse signal and normal operation of equivalent circuit,but also realize fast and reliable analysis of pulse signal by means of Gigabit Ethernet. It solves the problems of low speed and lag of response of traditional equivalent equipment. 展开更多
关键词 initiating explosive device (IED) equivalent circuit Gigabit Ethernet
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Low Cost,Low Power Magnetic IEDs Detection Method Using Biaxial Magnetometry Digital Sensors
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作者 Hamzah Naser Alrawi Widad Ismail 《Journal of Electronic Science and Technology》 CAS CSCD 2016年第3期229-233,共5页
The magnetic improvised explosive devices (IEDs), also commonly known as a type of a sticky bomb, is simply constructed devices yet very lethal. This paper puts forward the idea of an electronic compass that is capa... The magnetic improvised explosive devices (IEDs), also commonly known as a type of a sticky bomb, is simply constructed devices yet very lethal. This paper puts forward the idea of an electronic compass that is capable of sensing the change of a magnetic field generated by a magnet and translating it into interpretable data, which could act as the base for the further studies and assist in developing a greener automated system for detecting this device. The electronic compass is specifically chosen for reducing power consumption of systems in addition to the fact that it is available at a low cost. 展开更多
关键词 COMPASS detect low power sensor improvised explosive devices (lED) MAGNETS magnetometer.
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Neural Networks Combined with Importance Sampling Techniques for Reliability Evaluation of Explosive Initiating Device 被引量:10
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作者 GONG Qi ZHANG Jianguo +1 位作者 TAN Chunlin WANG Cancan 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2012年第2期208-215,共8页
Concerning the issue of high-dimensions and low-failure probabilities including implicit and highly nonlinear limit state function, reliability analysis based on the directional importance sampling in combination with... Concerning the issue of high-dimensions and low-failure probabilities including implicit and highly nonlinear limit state function, reliability analysis based on the directional importance sampling in combination with the radial basis function (RBF) neural network is used, and the RBF neural network based on first-order reliability method (FORM) is to approximate the unknown implicit limit state functions and calculate the most probable point (MPP) with iterative algorithm. For good efficiency, based on the ideas that directional sampling reduces dimensionality and importance sampling focuses on the domain contributing to failure probability, the joint probability density function of importance sampling is constructed, and the sampling center is moved to MPP to ensure that more random sample points draw belong to the failure domain and the simulation efficiency is improved. Then the numerical example of initiating explosive devices for rocket booster explosive bolts demonstrates the applicability, versatility and accuracy of the approach compared with other reliability simulation algorithm. 展开更多
关键词 neural networks importance sampling explosive initiating device RELIABILITY NONLINEARITY
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Blast Injury from Locally Manufactured“Hakka Patas”
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作者 Chathula Ushari Wickramasinghe Amal Nishantha Vadysinghe 《Journal of Forensic Science and Medicine》 2023年第1期81-83,共3页
Explosives are potentially harmful devices that can create an explosion by a rapid release of a pressurized gas consequent to a chemical reaction within the device.They can inflict a variety of injuries,due to the bla... Explosives are potentially harmful devices that can create an explosion by a rapid release of a pressurized gas consequent to a chemical reaction within the device.They can inflict a variety of injuries,due to the blast wave,fire,and shrapnel.The pattern and severity of injuries will be determined by various factors,including explosive potential and constituents such as shrapnel.Homemade explosive devices(HEDs)pose a further threat due to their volatile,unpredictable nature which can lead to accidental explosions.We present the case of a 28-year-old farmer who presented with extensive blast injury to the left hand from a“Hakka patas,”a HED endemic to Sri Lanka.The injuries to his hand consisted of extensive soft tissue and muscle loss,and fractures of metacarpal bones with amputation of the first distal phalanx.Low-grade explosives such as“Hakka patas”have the potential to cause injury greater than expected due to their volatile,unpredictable nature,causing accidental explosions.This can injure unintended targets,resulting in grave consequences.The specific pattern described in low-grade explosive injuries will be important to differentiate other explosive-related injuries for medicolegal purposes. 展开更多
关键词 Blast injury explosive devices hand injury
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