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31 results about "TNT equivalent" patented technology

TNT equivalent is a convention for expressing energy, typically used to describe the energy released in an explosion. The "ton of TNT" is a unit of energy defined by that convention to be 4.184 gigajoules, which is the approximate energy released in the detonation of a metric ton (1,000 kilograms or one megagram) of TNT. In other words, for each gram of TNT exploded, 4,184 joules (or one large Calorie = 1,000 calories) of energy are released.

Chemical engineering equipment explosion risk assessment control system based on cloud computing

InactiveCN106952036AThe results are reasonably accurateAccurate discoveryTechnology managementResourcesControl systemRisk identification
The invention belongs to the technical field of explosion risk assessment and discloses a chemical engineering equipment explosion risk assessment control system based on cloud computing. The system comprises an extreme pressure acquisition module, an explosion probability acquisition module, a cloud computing module, a risk assessment module and a memory, can solve a problem that a traditional method (such as a TNT equivalent weight method, a Multi-Energy method and the like) has limitation, is not intuitive, poor in accuracy and expressive force, and cannot carry out explosion near-field prediction, takes account of the development process of an explosion accident, combines the influences of factors such as accident probability, comprehensively takes the explosion risk of the chemical engineering equipment into consideration, is reasonable and accurate in results, and suitable for explosion risk assessment and explosion risk identification of a chemical engineering factory with dense pipelines and a large number of apparatuses.
Owner:贵州省煤炭产品质量监督检验院

Damage effect evaluation method and device of explosion shock wave

The embodiment of the invention provides a damage effect evaluation method and device of an explosion shock wave. The method comprises obtaining the environmental model parameters and the mannequin model parameters, obtaining explosive category, explosive name and explosive mass, calculating TNT equivalent corresponding to explosive according to explosive category, explosive name and explosive mass, and obtaining explosive radius according to TNT equivalent corresponding to explosive; inputting the environmental model parameters and the mannequin model parameters, as well as the radius of theexplosive into the K file of ANSYS / LS-DYNA software to obtain the target calculation file; and then calling the ANSYS / LS-DYNA software to calculate the target calculation file based on the total timelength and the core number of ANSYS / LS-DYNA, and evaluate the damage grades of various parts of the human body according to the calculation results. The method and the device can automatically createand obtain different explosion environments according to parameterized settings, and are used for simulating human body damage under different explosion environments, and can directly, accurately andefficiently evaluate human body damage caused by explosion shock waves.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Pouring-type high-energy insensitive explosive and preparation method thereof

The invention relates to a pouring-type high-energy insensitive explosive and a preparation method thereof. In order to solve the problem of a low energy level of traditional butylated hydroxy castingPBX explosives, an energy-containing adhesive and an energy-containing plasticizer are introduced as a binder system, and through addition of high-energy explosives and metal fuel components, the prepared pouring-type PBX explosive has high energy characteristics; the explosive formula has a density greater than 1.85 g / cm<3>, the detonation velocity is greater than 7800 m / s, and the explosive power is that of 1.9 times or above the TNT equivalent; and at the same time, the explosive formula has good low-vulnerability, and especially has mild reactions in slow-speed burning tests, and the reaction level does not exceed a detonation level.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Testing cable sealing device for container for simulating deepwater environment explosion test

InactiveCN103822028AAchieving multiple longitudinal sealsImprove sealingPipesBlastingClassical mechanicsWasher
The invention relates to a testing cable sealing device for a container for simulating a deepwater environment explosion test. According to the technical scheme, two to fifteen cable holes (8) are formed around the center of a flange cover plate (1) and located in a protection cover (2); each cable hole (8) is a through hole which is formed by three sections, the hole diameter of the upper portion is larger than the hole diameter of the lower portion, a sprue (7), sealant (6) and a ring washer (5) are concentrically arranged on the middle section of each cable hole (8) from bottom to top, each compression bolt (4) is fixedly connected with the upper section of the corresponding cable hole (8) through threads, and the lower end of each compression bolt (4) is tightly pressed on the upper plane of the corresponding ring washer (5); a testing cable (3) sequentially penetrates through the protection cover (2), the corresponding compression bolt (4), the corresponding ring washer (5), the corresponding sealant (6) and the lower section of the corresponding cable hole (8) to be connected with an underwater impact wave pressure sensor. The testing cable sealing device is high in compression resistance, good in sealing performance, easy to assemble, wide in application range, and capable of meeting the requirement for simulating the 0.01-Kg TNT equivalent explosion test at the 200 m underwater environment.
Owner:WUHAN UNIV OF SCI & TECH

Aircraft fire numerical simulation calculating method

The invention relates to aircraft safety performance design, in particular to an aircraft fire numerical simulation calculating method. The numerical simulation calculating method comprises the steps of firstly, simplifying an aircraft geometric model, and building a corresponding mathematic model; secondly, selecting a constraint condition, wherein the constraint condition comprises the position of an ignition point, the varieties, number and distribution of combustible materials, and external environments; thirdly, conducting grid division on the mathematic model in the first step; fourthly, according to the results of the second step and the third step, conducting analogue simulation through a turbulent combustion model method, a heat radiation model method and a vaporous cloud explosion overpressure calculation TNT equivalent method so as to obtain a smog site, a temperature site and a fuel oil vapor explosion situation when an aircraft fire occurs. According to the aircraft fire numerical simulation calculating method, reliable data can be quickly obtained through simulation calculating, a guiding suggestion is put forward about the influence and prevention of the aircraft fire, the cost is saved, and the danger and pollution can be avoided at the same time.
Owner:XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA

Assessment method for leakage safety of mixed working medium in organic Rankine cycle system

The invention discloses an assessment method for leakage safety of a mixed working medium in an organic Rankine cycle system. The method comprises the steps of firstly, building a working medium leakage simulation model; performing numerical simulation on spatial distribution after leakage of the working medium by utilizing Fluent software, and exploring a diffusion law after leakage of the mixed working medium; based on a numerical simulation result, marking out a region in which combustion and explosion occur possibly in combination with an explosion limit of the working medium; by applying a TNT equivalent method and an overpressure criterion, quantitatively assessing the damage / harm degree of an explosion accident to buildings and indoor personnel; and through further numerical simulation, exploring proper risk avoidance measures. According to the method, the leakage risk of the mixed working medium is assessed based on a system operation level in combination with a CFD technology, the TNT equivalent method and the explosion limit of the working medium, and based on this, targeted risk prevention measures are proposed, so that the security performance of the system is improved, the risk assessment is more comprehensive and specific, and an accurate reference basis is provided for assessing the safety of the working medium applied by a waste heat recovery and thermal cycle system.
Owner:TIANJIN UNIV

Charging method for solid carbon dioxide in fracturing hole for non-blasting excavation rock

InactiveCN107989611AOptimizing the rock-breaking charge structureClear stepsDisloding machinesBlastingStep heightSolid carbon dioxide
The invention discloses a charging method for solid-state carbon dioxide in fracturing hole for non-blasting excavation rock. The charging method comprises the following steps that S1, complete gasification of a single solid-state carbon dioxide in site is determined to reach the energy of rock breaking level; S2, the catalyst dosage is determined; and S3, the single solid-state carbon dioxide andthe catalyst are put at certain distance in an opening of the rock mass, and charging is carried out using a sectionalized charging way. An analogy method is adopted, the completely vaporized energyof the solid-state carbon dioxide is equivalent to the standard TNT equivalent of blasting, and then a selection is carried out by parameter choice of the sectionalized charging of the existing blasting; and the steps are clear, the operation is possible, the structure of solid-state carbon dioxide rock-breaking charging is optimized, step height is increased, the limitations of existing chargingmethod is broke, the amount of single rock breaking can be effectively increased, and the rock breaking efficiency is improved.
Owner:中铁(广州)投资发展有限公司 +1

Vibration speed prediction method for foundation pit static blasting close to structures

ActiveCN108399296AReduce on-site forecast workloadReduce forecasting costsArtificial lifeDesign optimisation/simulationGeological Strength IndexEngineering
The invention discloses a vibration speed prediction method for foundation pit static blasting close to structures. The method includes: adopting a genetic neural network to predict vibration speed ina static blasting influence range, to be more specific, taking GSI (geological strength index), rock hardness degree mi, rock disturbing degree D, explosive load G and distance b between explosive load holes and nearby structures or pipelines as input parameters, acquiring sample input parameter distribution on the basis of an orthogonal design principle, and adopting a TNT equivalent method forequivalence of a liquid carbon dioxide rock breaking device into a TNT explosive model to further adopt LS-DYNA software for calculating to generate sample output parameters, adopting a training sample set to train the genetic neural network to obtain a mapping relation between the input parameters and the output parameters, and adopting the mapping relation to realize practical vibration speed prediction in engineering.
Owner:DALIAN MARITIME UNIVERSITY

Chemical storage tank steam cloud explosion accident simulation analysis method and system

The invention discloses a chemical storage tank steam cloud explosion accident simulation analysis method which comprises the following steps: analyzing a liquid pool evaporation process according tophysicochemical characteristics of substances stored in a chemical storage tank and environmental conditions including a wind direction and ground heat, and establishing a heat transfer model betweenthe ground and a liquid pool according to an analysis result to obtain an actual fuel quantity in steam cloud; based on the actual fuel quantity in the steam cloud, creating a steam cloud explosion consequence model in combination with a TNT equivalent method, and simulating and analyzing the steam cloud explosion accident consequence of the chemical storage tank. According to the invention, the analysis result of the steam cloud model is more accurate, the damage degree of life and property caused by the steam cloud explosion accident of the chemical storage tank is simulated and analyzed, and the accuracy of the simulation result is high; and the optimal escape path can be quickly planned according to the explosion simulation result and the actual environment information of the storage tank area, and is displayed on a GIS map in an animation form to prompt workers to quickly evacuate from the dangerous area, so that the casualty risk is effectively reduced.
Owner:山东慧泰智能科技有限公司

Toxic gas explosion box testing device and testing method thereof

ActiveCN110243861AExtended Measuring DoseReduce the measurement conditionsComponent separationMaterial exposibilityToxic gasExhaust valve
The invention discloses a toxic gas explosion box testing device and a testing method thereof. The toxic gas explosion box testing device comprises an explosion box, a mixing mechanism, an collecting and analyzing mechanism and an exhaust mechanism; the explosion box has an explosion chamber, and a carronade for placing a sample is arranged in the explosion chamber; the mixing mechanism comprises a mixing pipeline, both ends of the mixing pipeline are connected with the explosion chamber, and an air compressor and a pneumatic valve are connected to the mixing pipeline; and the gas collecting mechanism comprises a collecting pipeline and a vent valve, and one end of the collecting pipeline communicates with the mixing pipeline. By means of the cooperation of the mixing mechanism, the collecting and analyzing mechanism and the exhaust mechanism, an explosive is exploded under a normal pressure, the test dose can reach 500g TNT equivalent, the charging diameter can reach 100mm, the blank of domestic explosive toxic gas generation amount test is filled, an emulsion explosive is applied to the test, and a scientific means is provided for testing the toxic gas contents of explosives without cap sensitivity.
Owner:CHINA COAL TECH & ENG GRP HUAIBEIBLASTING TECHN RES INST

Simplified calculation method for terrorist explosion shock wave characteristic parameters

The invention relates to a simplified calculation method for terrorist explosion shock wave characteristic parameters. Firstly, it is assumed that an explosive device with the explosive load being W kg TNT equivalent explodes on the ground which is R meters away from the center of a building orifice, wherein the ambient atmospheric pressure is P0, the air density is rho0, the volume of the orificestructure is V0, the volume of the building structure is V, the pressure of shock waves entering the building structure from the orifice structure is uniformly distributed, and the shock wave characteristic parameters comprise shock wave uniform distribution pressure delta PC, positive pressure action time tau + C and average positive pressure impulse IC; and then an explosion simulation test iscarried out, and data fitting is adopted to obtain a calculation formula of an average value of explosion shock wave parameters entering the building structure from any orifice structure when the conventional weapons with different equivalents explode at any position outside the building structure. According to the method, the characteristic parameters of the shock waves entering the building fromthe orifice structure can be rapidly and accurately calculated, and the method is of great significance to damage evaluation and protection evaluation of the interior of the orifice structure.
Owner:中国人民解放军军事科学院国防工程研究院工程防护研究所

Natural gas station yard analysis cabin on-line analysis instrument installation interval design method

The invention relates to a natural gas station yard analysis cabin on-line analysis instrument installation distance design method. The method comprises: (A) collecting basic parameters of an on-lineanalysis instrument; (B) calculating blasting energy of all instruments according to the collected data, converting the blasting energy into TNT equivalent values, and selecting the instrument with ahigher value as a layout basis; (C) fitting the relationship between the correlation failure probability and the equivalent distance by combining a Gaussian distribution function probability model onthe basis of shock wave overpressure generated by explosion of 1,000 kg of TNT explosives, selecting an acceptable correlation failure probability, and qualitatively determining the equivalent distance; (D) calculating the safety distance of the selected instrument by combining the calculation results of the step (B) and the step (C) on the basis of the principle of shock wave overpressure equality; and (E) designing or adjusting the layout between the online analytical instruments according to the calculation result of the step (D). The calculated safety distance of the online analytical instrument provides guidance for installation and layout of the instrument, and provides guarantee for safe operation of an analytical cabin.
Owner:SOUTHWEST PETROLEUM UNIV

Explosion equivalent and reaction level test system and method

The invention discloses an explosion equivalent and reaction level test system, comprising a computer, a sound level meter and an explosive device, wherein the sound level meter is composed of a sensor, an amplifier and a host, and the host is in charge of performing conditioning and acquisition storage on a signal. The system can take sound power as an explosion equivalent evaluation means and method and can quantitatively judge a reaction level of an explosive, and a new means is provided for testing the reaction level and equivalent of the explosive.
Owner:INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS

Electrical appliance emergency equipment explosion disaster environment adaptability evaluation method

The invention discloses a method for evaluating environmental adaptability of explosion disasters of electric appliance emergency equipment. The evaluation method comprises the following specific evaluation steps of explosion disaster accidents and emergency equipment field data information being obtained; a TNT equivalent method being used for obtaining the TNT equivalent of the explosion disaster accident; acquiring an overpressure value borne by the emergency equipment according to an overpressure formula; according to an overpressure criterion and a similarity law, determining experiment parameters of the explosive quantity and the explosion distance of the experiment platform; determining performance evaluation indexes of the emergency equipment from national standards according to vulnerability and importance principles, determining evaluation index layering and index weights by an analytic hierarchy process, and determining the adaptive capacity of the emergency equipment facingan explosion disaster environment by a fuzzy mathematical method according to an experimental result, namely the performance damage condition of the emergency equipment. According to the method provided by the invention, an experiment platform can be adopted to evaluate the damage condition of the electric appliance emergency equipment in the explosion disaster environment, and then a fuzzy mathematics comprehensive evaluation method is adopted to evaluate the adaptive capacity of the electric appliance emergency equipment in the actual explosion disaster environment.
Owner:NANJING UNIV OF SCI & TECH

Electronic detonator underwater explosive power testing device based on water hammer wave signals

The invention provides an electronic detonator underwater explosive power testing device based on water hammer wave signals. During testing, an open and safe water area is selected; the testing device is assembled, an electronic detonator and an underwater shock wave sensor are arranged in an annular frame, and a detonating circuit and a signal receiving circuit are connected; the connection condition of the device is checked, and the testing device is placed in the water area after it is determined that no problem exists; the electronic detonator is detonated, the water hammer wave signals are collected through a sensor, a P-t curve is obtained, and parameters such as the underwater explosive shock wave pressure peak value are obtained; and the TNT equivalent value of the tested electronic detonator is calculated. The device is developed on the basis of the water hammer wave signals, the interference of environmental noise is small, the testing precision is high, no noise is generated in the testing process, the device is environmentally friendly and free of pollution, in addition, fragments generated after the detonator is detonated in water cannot fly into the air, no threat is caused to surrounding persons, safety and reliability are achieved, and the testing requirements under different water depth conditions can be met.
Owner:ZHENGZHOU UNIV

A test cable sealing device for simulating deep water environment explosion test container

InactiveCN103822028BAchieving multiple longitudinal sealsImprove sealingPipesBlastingWave pressureEngineering
The invention relates to a testing cable sealing device for a container for simulating a deepwater environment explosion test. According to the technical scheme, two to fifteen cable holes (8) are formed around the center of a flange cover plate (1) and located in a protection cover (2); each cable hole (8) is a through hole which is formed by three sections, the hole diameter of the upper portion is larger than the hole diameter of the lower portion, a sprue (7), sealant (6) and a ring washer (5) are concentrically arranged on the middle section of each cable hole (8) from bottom to top, each compression bolt (4) is fixedly connected with the upper section of the corresponding cable hole (8) through threads, and the lower end of each compression bolt (4) is tightly pressed on the upper plane of the corresponding ring washer (5); a testing cable (3) sequentially penetrates through the protection cover (2), the corresponding compression bolt (4), the corresponding ring washer (5), the corresponding sealant (6) and the lower section of the corresponding cable hole (8) to be connected with an underwater impact wave pressure sensor. The testing cable sealing device is high in compression resistance, good in sealing performance, easy to assemble, wide in application range, and capable of meeting the requirement for simulating the 0.01-Kg TNT equivalent explosion test at the 200 m underwater environment.
Owner:WUHAN UNIV OF SCI & TECH

Rapid low-humidity explosion tank device for static safety detection

The invention discloses a rapid low-humidity explosion tank device for static safety detection, comprising an anti-explosion tank body and a sealing cover at the upper part of the tank body; the inner part of the anti-explosion tank body is provided with a molecular sieve, the inner part of the anti-explosion tank body is further provided with an isolating sieve; a static discharge pillar is installed in the isolating sieve, a humidity sensor and an air changing channel are arranged on the sealing cover; a part of a static discharging pillar is located in the isolating sieve, and a part is extended out of the outer part of the sealing cover. The two dehumidifying methods of the molecular sieve and the vacuumizing are carried out at the same time, thus the dehumidifyin speed is quick, and the lowest humidity can be reached. The humidity can rapidly reach about 10% RH level, and realize the extreme low humidity for the test. An isolating sieve can stop breaking pieces generated from the explosion, and protect the molecular sieve. The anti-explosion tank body can bear a certain TNT equivalent explosion.
Owner:INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS

Test observation method for electric explosion and energetic material synergistic explosion effect

The invention provides a test observation method for an electric explosion and energetic material synergistic explosion effect. The test observation method comprises the following steps: connecting a metal wire and an energetic material capsule between an upper discharge electrode and a lower discharge electrode; arranging an electrical parameter measuring unit; building and debugging an optical observation unit; controlling the trigger time sequence of the high-speed framing camera, the laser and the discharge trigger through a delayer, and setting the trigger delay; setting charging / discharging parameters of an energy storage capacitor according to the to-be-fed electric energy, and debugging an oscilloscope and setting to be in a to-be-triggered state; connecting a circuit; filling nitrogen into the explosion cavity; pressing a trigger button of the discharge trigger to form a synergistic explosion effect; calculating and analyzing an electrical parameter measurement result; and processing and analyzing framing image data. According to the invention, the circuit conduction time is prolonged, the energy fed into the energetic material is increased, the output energy reaches three times of the TNT equivalent, and the synergistic explosion of the electrical explosion and the energetic material is realized.
Owner:XIAN MODERN CHEM RES INST

Method for predicting bending response of simply supported reinforced concrete beam under near-field explosion

The invention discloses a method for predicting the bending response of a simply supported reinforced concrete beam under near-field explosion. According to the method, the bending response process ofa structure under near-field explosion can be predicted according to the explosive TNT equivalent, the relative position relation between an explosive and a target and the target characteristic quantity. The method comprises the steps that firstly, a shock wave pressure peak value and specific impulse distribution model of the structure surface is established according to the explosive TNT equivalent and position, then deformation functions and equivalent conversion coefficients of elastic and plastic stages are calculated according to load characteristics, and a single-degree-of-freedom kinetic equation of the structure under near-field explosion is established; and finally, the bending response of the structure can be predicted through equation difference solution.
Owner:XIAN MODERN CHEM RES INST

Explosive substance solution critical explosion temperature testing container

PendingCN112858386AObserve the temperature in real timeSolve problems that have a very large impact on test resultsMaterial exposibilityExplosives safetyEngineering
The invention belongs to the technical field of explosive safety testing, and particularly relates to a novel explosive substance solution critical explosion temperature testing container. The container is used for testing the critical explosion temperature of an explosive mixture of one or more impurities in different solvents with different concentrations. The container comprises a container barrel, a barrel cover and a barrel bottom, wherein a pressure release valve and a non-contact infrared temperature sensor are arranged on the barrel cover, a reaction tank is arranged at the bottom of the container barrel, a reaction pool is arranged in the reaction tank, an electric heating wire is disposed outside the reaction pool, a contact type temperature sensor is disposed at the bottom of the reaction tank, a pressure sensor is disposed at the bottom of the container barrel, a non-contact infrared temperature sensor is arranged on the barrel cover, a sealing cover is arranged on the upper portion of a sensor hole, and transparent tempered glass is arranged on the lower portion of the sensor hole. The container has the main advantages that the required volume of the reaction container can be designed according to the TNT equivalent of the actual reaction, the design program is clear, and calculation and processing are easy; the equivalent is convenient to adjust, the experiment cost is greatly reduced and the safety performance is high.
Owner:TAIYUAN INST OF TECH

Electric explosion and energetic material synergistic explosion effect test platform and observation device

PendingCN113533429AIncrease plasma concentrationExtended on-timeMaterial exposibilityCapacitanceEngineering
The invention provides an electric explosion and energetic material synergistic explosion effect test platform and an observation device. The platform comprises an explosion cavity, a first optical window and a second optical window which are coaxially arranged are arranged on the side wall of the explosion cavity along the radial direction, and an energetic material capsule is arranged in the middle position in the explosion cavity. A metal wire penetrates through the energetic material capsule in the axial direction, the top end of the metal wire is connected to an upper discharge electrode arranged at the top of the explosion cavity, and the bottom end of the metal wire is connected to a lower discharge electrode arranged at the bottom of the explosion cavity. The lower discharge electrode, the trigger switch, the energy storage capacitor, the upper discharge electrode and the metal wire are sequentially connected in series through a cable to form an electric explosion loop; and the test platform has the characteristics that the explosion heat reaches 3 times of TNT equivalent and the like, and is suitable for a novel high-energy material explosion effect simulation test.
Owner:XIAN MODERN CHEM RES INST

A Monte Carlo method-based dangerous goods storage yard explosion power determination method

ActiveCN109740196ADetermination of the explosive power of the yardImprove adaptabilitySpecial data processing applicationsStatistical classificationYard
The invention discloses a method for determining the explosive power of a hazardous article storage yard based on a Monte Carlo method. The method comprises the following steps: (10) explosive statistical classification: classifying explosives piled up in the storage yard according to types; (20) determining the number of times of random simulation: determining the number n of times of random simulation through an error calculation formula of a Monte Carlo method; (30) carrying out random simulation: carrying out n groups of random simulation and calculating equivalent TNT equivalent values corresponding to each group of random simulation values; (40) determining a probability density distribution function: determining the distribution function of the probability density through the distribution of equivalent TNT equivalent values; and (50) calculating an equivalent TNT equivalent design value: calculating the equivalent TNT equivalent design value of the storage yard on the basis of the given effective protection probability. The method for determining the explosion power of the hazardous article storage yard is good in adaptability and high in accuracy.
Owner:ARMY ENG UNIV OF PLA +1

Evaluation method and device for damage effect of blast shock wave

Embodiments of the present invention provide a method and device for evaluating the damage effect of an explosion shock wave. By obtaining environmental model parameters and human body model parameters, and obtaining the explosive category, explosive name and explosive quality, according to the explosive category, explosive name and Calculate the mass of the explosive to obtain the TNT equivalent of the explosive, and obtain the radius of the explosive according to the TNT equivalent of the explosive; input the environmental model parameters, human body model parameters and the radius of the explosive into the K file of the ANSYS / LS-DYNA software to obtain Target calculation file; then call ANSYS / LS-DYNA software to calculate the target calculation file according to the total time of calculation and solution and the number of ANSYS / LS-DYNA cores, and evaluate the damage level of each part of the human body according to the calculation results. The method and device can automatically create and obtain different explosion environments according to parameterized settings, are used to simulate human body damage in different explosion environments, and can intuitively, accurately and efficiently evaluate the damage to the human body caused by blast shock waves.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

A Source Term Estimation Method for Radioactive Aerosol Diffusion in Conventional Explosions

The invention discloses a method for estimating the source term of conventional explosion radioactive aerosol diffusion, comprising the following steps: aiming at the conventional explosion of radioactive substances on the ground, estimating the explosion equivalent, and estimating the size of the explosion smoke cloud based on the explosion equivalent, and the size of the explosion smoke cloud includes: The height of the explosion smoke cloud, the radius of the explosion smoke cloud, the volume of the explosion smoke cloud, and the density of the explosion smoke cloud, estimate the proportion of the explosion aerosol and the particle size distribution of the aerosol, estimate the impact of the heavy gas effect on the source term, and set the explosion event Nuclides of concern. This method is based on the explosion equivalent, explosive mass, and local wind speed, and comprehensively considers the size of the explosion smoke cloud, the proportion of the explosion aerosol, the particle size distribution of the aerosol, and the influence of the heavy gas effect on the source item to form a source item estimation method. , which is more in line with the actual situation, and the effect is better than that of the point source diffusion model.
Owner:CHINA INST FOR RADIATION PROTECTION

Intelligent chemical industry park canned substance explosion influence analysis method

PendingCN113051715AReduce the impactSolve the problem of dividing standards for safety levelsData processing applicationsDesign optimisation/simulationChemical industryExplosive Agents
The invention provides an intelligent chemical industry park canned substance explosion influence analysis method. The method comprises the following steps: S1, calculating the explosion energy Q of a medium contained in a storage tank according to the attribute of the medium contained in the storage tank and storage tank container parameters; S2, converting the explosion energy Q into TNT equivalent QTNT, wherein the QTNT is explosion energy released by explosion of a medium contained in the storage tank; S3, executing a simulation experiment, igniting and detonating the Q0 amount of TNT explosive at a safe open position, and recording the distance R0 from the target to the explosion center and the shock wave overpressure P0 of the corresponding distance; S4, fitting a unary multiple curvilinear equation of the shock wave overpressure P0 with respect to the distance R0; S5, calculating the simulation ratio alpha of the medium explosion energy Q to the simulation experiment TNT explosive energy; S6, traversing the critical value of the impact wave overpressure on the damage level of the human body or / and the building, and solving the corresponding distance R under each damage level. The method for analyzing the explosion influence of the canned substances in the intelligent chemical industrial park has the advantage that the safety awareness of the chemical industrial park is improved conveniently.
Owner:CHONGQING NORMAL UNIVERSITY

Warhead fragment mass distribution test method and system

ActiveCN113405411ASolve the problem of fragment mass distributionImprove test efficiencyAmmunition testingExplosive AgentsEngineering
The invention discloses a warhead fragment mass distribution test method and system. The penetration condition of a target plate caused by a high-speed fragment group generated by the explosion of a to-be-tested warhead obtained through a test is combined with a fragment scattering angle and speed, and the mass distribution of fragments is obtained through fitting, so that the problem that the mass distribution of the fragments of the large-size warhead filled with the explosive with the large TNT equivalent is difficult to directly obtain through the test is solved; and meanwhile, the flying angle and speed distribution of the fragments can be obtained through a single experiment, so that the test efficiency is effectively improved, and a large amount of manpower, material resources and financial resources are saved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
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