29 results about "Overpressure" patented technology

The invention discloses a multi-point explosion hazard effect evaluation test method and a multi-point explosion hazard effect evaluation test system. The method comprises the following steps: uniformly distributing a plurality of explosion sources with prefabricated fragments on the same circumference and synchronously detonating; determining abdominal line distribution based on a shock wave superposition principle, and dividing a reference ring, an inner ring and an outer ring by taking an explosion central point O as a circle center according to a predicted overpressure peak value; and cake-shaped and penholder-type free field pressure sensors, impulse targets, simulation dummies, pine targets and speed measurement targets are systematically arranged on each ring layer along the abdominal line direction. By synchronously collecting multi-parameter data such as shock wave pressure-time history, fragment speed, target deformation, human body reflection overpressure and the like, quantitative analysis of shock wave superposition and attenuation characteristics, fragment power field distribution, human body damage risk and explosion impulse aftereffect is realized. The problem that the multipoint explosion hazard effect lacks a standardized test means is solved, and data support is provided for protection equipment research and development and safety standard formulation.

The invention relates to a device for operating non-explosion-proof equipment in a potentially explosive atmosphere, comprising a pressurized housing (1) designed to accommodate the non-explosion-proof equipment (2), a purge gas inlet (3) arranged upstream of the housing (1) through which a protective gas (4) can be supplied to the housing (1) under overpressure, and a purge gas outlet (7) arranged downstream of the housing (1) through which the protective gas (4) can be discharged from the housing (1). For the discharge of the protective gas (4), an outlet valve (8) with a valve seat (16) and a valve body (30) is arranged in the purge gas outlet (7). The valve body (30) is connected to the first end of a guide axis (31) which is slidably mounted in a through bore (21) in the valve seat (16) along the valve axis (15) so that the valve body (30) is axially adjustable between a closed position and an open position.By means of a spring element (34), the valve body (30) is biased against the valve seat (16) in the closed position. To achieve efficient and gentle operation with moderate equipment costs, the invention proposes that a baffle element (32) be attached to the opposite second end of the guide axis (31) and that a control housing (25) with a working chamber (28) be connected to the valve seat (16), wherein the baffle element (32) is arranged within the working chamber (28) and without contact with the control housing (25). Furthermore, the control housing (25) has a connection (27) to which a control line (9) is connected for supplying the working chamber (28) with a working fluid (29), via which the working chamber (28) and the baffle element (32) arranged therein can be pressurized with the working fluid (29) from the control line (9).

The utility model relates to the technical field of gas distribution, and provides a safe gas distribution device, which comprises a manifold, a gas inlet pipe arranged at the front end of the manifold, a gas inlet flange fixed at the end part of the gas inlet pipe, a plurality of groups of gas outlet pipes arranged at the rear end of the manifold, and a control assembly arranged at the end part of the gas outlet pipe and comprising a valve arranged at the end part of the gas outlet pipe, during use, air, nitrogen and other gas supplied from the outside are conveyed to gas using points through the manifold, explosion caused by overpressure of the manifold is effectively avoided in the use process, the pipe clamp is ingeniously and additionally arranged on the gas outlet pipe, one end of the pipe clamp is firmly connected with the gas outlet pipe, and the other end of the pipe clamp is tightly attached to an external hose. Even if the screw threads are loosened under the extreme condition, the hose can be effectively prevented from flying freely due to the fact that the hose loses constraint by means of the stable constraint effect of the pipe clamp, and then the personal safety of field operators is practically guaranteed.

The application relates to a combustion and explosion risk prediction method and device based on a working condition self-adaptive fractal dimension, and particularly relates to the technical field of combustion and explosion safety. The method comprises the following steps: firstly, acquiring environment monitoring data and space structure data of a closed space; then, determining a flow field working condition in the closed space according to the environment monitoring data and the space structure data, the flow field working condition being used for determining a fractal dimension and a flame acceleration critical radius, the fractal dimension and the flame acceleration critical radius being self-adaptive to the turbulent intensity of the flow field working condition; using an overpressure prediction model to determine a combustion and explosion overpressure prediction result of a combustible mixture in the closed space according to the fractal dimension and the flame acceleration critical radius; and finally, determining a combustion and explosion risk grade corresponding to the closed space according to the combustion and explosion overpressure prediction result. The application can self-adaptively determine the flame propagation characteristics corresponding to the fluid working condition, predict the combustion and explosion overpressure, and further improve the combustion and explosion overpressure prediction accuracy.

The uniqueness of the presented invention is a biofidelic, metamaterial structured, integrated with wireless sensors, modular, reusable, and anatomically accurate human surrogate (for both male and female) designed for testing and evaluation of personal protective equipment (PPE), and blast environments. Structured with metamaterials, the surrogate demonstrates a biofidelic response to blast overpressure. Metamaterials tailored for blast applications manipulate properties such as wave speed, acoustic impedance, and frequency response to match human tissues with minimized complexity. Incorporating technology from wearable blast sensors, the Blast Overpressure Body (BOB) provides high-resolution, high sampling rate, and time-synchronized simulated human blast data. Its modular design allows for easy replacement of damaged parts, alternative testing scenarios, and enhanced biofidelity, increasing flexibility and reusability. The BOB is a tool for testing, evaluating, and developing PPE and weapon systems, and for research, surveillance, and mitigation of blast exposure in military, industrial, civilian, and law enforcement contexts.

The utility model discloses a kind of gas active safety defense devices, it is related to gas safety equipment technical field, including shell, one side in the shell is equipped with air inlet pipe, another side in the shell is equipped with air outlet pipe, one end of the air inlet pipe and the air outlet pipe respectively with gas pipeline air inlet pipe and gas pipeline air outlet pipe intercommunication after penetrating out the shell, another end of the air inlet pipe and the air outlet pipe is communicated with gas meter after penetrating out the shell;Valve is installed on the air inlet pipe, valve front pressure sensor and valve rear pressure sensor are respectively installed on the air inlet pipe located the two sides of valve before and after;Flow sensor is installed on the air outlet pipe.The utility model gas active safety defense device can detect the data of gas pipeline in real time, can determine that gas pipeline under pressure, overpressure, gas over flow, leakage, earthquake and other abnormalities in time, and actively cut off gas pipeline, greatly improve the security of gas use.

According to the quasi-static load loading device with the condensed explosive as the explosion source, the condensed explosive is adopted as the explosion source, the structural design of the perforated plate is combined, the shock wave load generated by the explosion of the condensed explosive is converted into the quasi-static load, the load characteristic of the explosion of combustible gas is effectively simulated, and the explosive explosion efficiency is improved. Solid explosives can be used for simulating a load action form of gas explosion, so that the difficulty of a gas explosion experiment is remarkably reduced; the device provides an experiment detection platform for the structural damage effect under the gas explosion load effect, obviously improves the explosion overpressure on the basis of ensuring quasi-static loading, and solves the problems that the explosion overpressure is too small and the structure cannot be damaged in the original gas explosion experiment. Meanwhile, the homogeneous fine sand layer can be used for absorbing shock wave loads transmitted from holes in the perforated plate, the quasi-static load loading effect of the lower portion of the perforated plate is guaranteed, the pressure sensor can be protected, and an efficient and reliable experiment means is provided for explosion disaster protection research.

The utility model discloses an anti-explosion system for a main ash discharging bin, which comprises the main ash discharging bin, a pressure sensor and a nitrogen pipe are connected to the side of the main ash discharging bin, the pressure sensor is electrically connected with a PLC (programmable logic controller), the PLC is electrically connected with a control valve on the nitrogen pipe, and a bypass of the nitrogen pipe is connected with a pressure relief system. When the pressure is small, the nitrogen is filled into the ash discharging main bin to improve the internal pressure and guarantee the conveying stability, and when the pressure is large, the nitrogen is discharged into the buffer collector through the pressure relief pipe for pressure relief, so that the risk of explosion caused by overpressure in the ash discharging main bin is avoided; and dust in exhausted gas can be collected, and pollution to the surrounding environment is avoided.

A kind of anti-pressing multiple explosion-proof explosion door, be provided with explosion door body, the explosion door body is divided into front explosion door body and rear explosion door body, explosion space is arranged between the front explosion door body and rear explosion door body, the front explosion door body and rear explosion door body are provided with door body frame for fixing, the door body frame is provided with assembly component for further and wall assembly, front explosion door body and rear explosion door body and intermediate explosion space constitute the energy dissipation system of certain space, explosion shock wave is sequentially deformed through outer door body, realizes explosion-proof energy step-by-step attenuation, cooperation cross locking system formed by locking screw and transverse bolt, locking screw top drive motor is equipped with torque sensor, can dynamically adjust locking force according to impact intensity, under explosion overpressure, locking screw is forced to tighten by drive motor, so that door body and locking platform form rigid constraint.

The invention discloses a pre-filter with a pressure display function and a pipeline system, and relates to the technical field of pre-filters. Through the pressure display assembly, the pressure display cavity, the compression filling part and the transparent window on the filter cup, the visual display of the internal pressure of the pre-filter is realized; when the pipeline pressure is normal, the sliding piece is in a normal range of the pressure indication mark; when a water hammer effect occurs or pipeline pressure suddenly rises, the compression filling part is compressed, the sliding piece slides relative to the filter cup, pressure shock waves are absorbed, and the buffering protection effect is achieved; under the low-temperature icing condition, the sliding piece can be driven by ice expansion pressure to move, the compression filling part is compressed to vacate the containing space, and damage of icing expansion to the filter cup is relieved; meanwhile, the pressure display function is completely integrated in the filter cup, and an external pressure gauge is not needed, so that the risks of meter explosion and leakage caused by overpressure of a traditional external pressure gauge are avoided, and the safety, reliability and environmental adaptability of equipment operation are remarkably improved.

This application provides a method and system for simulating and predicting explosive shock waves. The method involves collecting geometric parameters of the target street; determining the equivalent diameter of the street cross-section and the relative positions of the explosion location and various street intersections based on these parameters; simulating the energy dissipation effect of the explosive shock wave based on all relative positions and the equivalent diameter to obtain the dominant mode; predicting the overpressure distribution when the explosive shock wave's load changes due to energy dissipation based on the dominant mode; predicting the temporal relationship of explosive shock waves from different paths arriving at the same street intersection based on the explosive equivalent and explosion location; spatiotemporally coupling the pressure time history in the overpressure distribution using the temporal relationship to obtain multiple overpressure peaks when the load of multiple explosive shock waves changes; and determining the load distribution under the constraint of the target street structure based on all overpressure peaks. Using the scheme of this application, the load of explosive shock waves can be accurately predicted under the constraint of urban street structures.

The invention discloses a test system and method for controllable blast impact load and high-temperature thermal effect, and the system comprises a gas explosion control device which is used for generating controllable blast impact load, the gas explosion control device controls the explosion peak overpressure, the explosion duration and the explosion continuous impact frequency by adjusting the type, the concentration and the turbulent flow structure of fuel in an explosion chamber of the gas explosion control device; the combustion control device is used for generating a controllable high-temperature heat effect, and the combustion control device enables the combustor to generate fire loads with different intensities by regulating and controlling fuel pressure, flow and ignition time; the load restraining device is used for simulating the initial stress state of the test body and monitoring the response of the test body; wherein the gas explosion control device, the combustion control device and the load restraint device are arranged cooperatively, so that the blast impact load and the high-temperature heat effect act on the same area of the test body according to a preset action mode, and the preset action mode is one of simultaneous action, sequential action and multiple action.

The invention belongs to the field of material safety testing, and discloses a comprehensive testing system for judging energetic material mixed liquid pipeline explosion propagation, which comprises a testing module, a detonation velocity measuring module, an overpressure measuring module, a video monitoring module, a synchronous triggering module and a data acquisition module, and is characterized in that the testing module comprises a testing pipe, a plastic plug and an initiating explosive column; the detonation velocity measurement module comprises a detonation velocity sensor; the overpressure measurement module comprises a shock wave overpressure sensor; the video monitoring module comprises an anti-explosion shelter and a high-speed camera; the synchronous trigger module comprises a metal target wire and a trigger body, and the metal target wire is wound on the initiating explosive column; the data acquisition module comprises a data acquisition instrument, and the detonation velocity sensor, the shock wave overpressure sensor, the high-speed camera and the trigger body are all connected to the data acquisition instrument. The explosion velocity, overpressure and image measurement modules are integrated, multi-parameter synchronous acquisition and cooperative comparison of explosion shock wave velocity, external overpressure and real-time images are realized, and the credibility of a judgment result is high.

The application discloses a kind of based on multiple software cooperative simulation box girder bridge explosion damage assessment analysis method.The steps of the method are as follows: firstly, precise three-dimensional model is established using SolidWorks parameterization technology, and high-precision material constitutive definition and complex assembly pre-processing are completed through ABAQUS;Then, the complete pre-processing model is seamlessly imported into ANSYS for explicit dynamics solution, realizing explosion shock wave propagation, fluid-structure coupling and full-process high-fidelity simulation of structural nonlinear response;Finally, the multi-physical field data such as damage pressure, stress, strain, displacement and overpressure are extracted, and the dynamic weight fusion algorithm proposed in the application is used to calculate the comprehensive damage index, realizing fast, objective, four-level quantitative evaluation from data to decision.The application constructs a standardized and integrated technology chain of "design-preprocessing-solution-evaluation", which significantly improves the analysis efficiency, accuracy and engineering practicability.

The embodiment of the application provides a safety distance determination method based on a liquid ethane pipeline leakage accident, which can solve the technical problem of poor flexibility of liquid ethane pipeline safety distance setting. The method comprises the following steps: obtaining the leakage rate and combustible gas mass of the liquid ethane pipeline under different leakage aperture conditions according to finite element calculation; determining the effective leakage source diameter according to the leakage rate; determining the jet fire length and jet fire surface area according to the effective leakage source diameter; determining the combustion heat according to the jet fire length and jet fire surface area; determining the surface emissivity according to the combustion heat; determining the thermal radiation value on the preset distance according to the surface emissivity; determining the combustible gas equivalent and explosion total energy according to the combustible gas mass; determining the positive maximum overpressure and shock wave positive impulse according to the explosion total energy and combustible gas equivalent; and determining the safety distance according to the thermal radiation value, the positive maximum overpressure and the shock wave positive impulse.

The application provides a shale gas reservoir fracturing method based on in-situ methane explosion, and belongs to the technical field of shale gas exploitation, and comprises the following steps: obtaining particles with specific physical properties by mechanically grinding original modifier crystals to prepare an ignition modifier; injecting oxygen into a shale gas exploitation pipeline, and mixing hydrogen into reservoir methane to form CH4-O2-air mixed gas; arranging multiple groups of high-pressure injection devices in the exploitation pipeline, respectively filling the ignition modifier and the modifier particles, and injecting high-pressure air as a driving gas source; synchronously triggering the high-pressure injection devices to inject materials and igniting the ignition assembly by a power controller, so that the mixed gas is burned and exploded, and explosion parameters are monitored; after the burning and explosion are completed, residual substances in the pipeline are removed, waste gas is discharged, and fracturing operation is completed. The application realizes significant synergistic improvement of explosion overpressure and explosion speed, has the advantages of high efficiency, cleanness, safety, environmental protection and economy, and is suitable for deep and high ground stress reservoir development.

The invention relates to the technical field of extra-high voltage direct current transmission, and discloses an anti-explosion calculation method for converter transformer valve side sleeve hole plugging, which comprises the following steps: arranging an anti-explosion and fireproof integrated plug with an anti-explosion framework at a hole, and providing anti-explosion bearing capacity by the anti-explosion framework; explosive shock wave overpressure borne by the plugging surface is simplified into equivalent evenly-distributed overpressure according to the midspan bending moment equal principle, and then the equivalent evenly-distributed overpressure is further simplified into equivalent static pressure based on the dynamics principle. An anti-knock framework is simplified into a simply-supported member with two hinged ends, and anti-knock performance evaluation is realized by verifying that the bending resistance of the simply-supported member is not less than a midspan equivalent static bending moment and the equivalent corner of a support of a node connected with a firewall does not exceed an allowable corner. By means of the method, the integrally-plugged anti-explosion framework meets the anti-explosion bearing capacity and deformation requirements and can be applied to actual engineering, the method does not need to depend on a full-scale explosion test, the method is suitable for hole plugging scenes of different sizes and different structures, the engineering applicability is improved, and the technical application cost is reduced.

The utility model provides a kind of protective box for anti-explosion fluorescent oxygen analyzer, it is related to protective box technical field, including explosion-proof box main body, analyzer main body and explosion-proof valve, explosion-proof box main body includes installation shell, two door main bodies are equipped with in the side of installation shell, the bottom of installation shell is fixedly installed with base.The utility model is measured when oxygen by inductor, explosion-proof box combines explosion-proof valve and other components to form protective system, explosion-proof box is isolated by heat-insulating blanket explosion high temperature radiation, reduce external temperature and reduce internal heat accumulation, delay equipment damage, iron wire net enhances the strength of box body, fixed heat-insulating blanket, inhibit the splashing of debris, disperse flame energy to hinder deflagration when explosion, rear explosion-proof valve is through movable plate when explosion, instantaneously release overpressure, prevent box body to break, reduce explosive power and keep structure intact, effectively isolate dangerous area, reduce personnel and equipment safety risk.

The invention discloses a method for rapidly applying a motion charge explosion load on a structure, and belongs to the technical field of explosion mechanics, and the method comprises the following steps: obtaining finite element models of motion charge incident explosion and reflection explosion, and obtaining overpressure time-history curves of incident shock waves and reflection shock waves at different positions in a space; spatial distribution of incidence peak overpressure, specific impulse and overpressure reflection coefficient of incident shock waves of the motion charge explosion is obtained through the overpressure time-history curve; and a calculation formula of incident peak overpressure, specific impulse and overpressure reflection coefficient of incident shock waves of the motion charge explosion is introduced through spatial distribution. By accurately capturing shock wave space distribution and introducing a quantification formula, the situation that local pressure is amplified due to reflection superposition of load deviation is avoided; the fitting coefficient optimizes the dynamic prediction, refines the duration to match the structural response, resulting in a subprogram generating a unit level curve, which can quickly apply a motion charge blast load to the structure.

The present application belongs to the technical field of shock wave overpressure test and data analysis, and particularly relates to a shock wave overpressure measurement precision evaluation method based on a high-speed camera system. The method comprises the following steps: S1: constructing a shock wave wave velocity measurement error model based on optical parameters of the high-speed camera system; S2: calculating a zero-order overpressure measurement error value based on the shock wave wave velocity measurement error model; S3: calculating a physical space wave velocity and an undisturbed air sound velocity based on explosion image sequences collected by the high-speed camera system; and S4: calculating a velocity correction factor based on the physical space wave velocity and the undisturbed air sound velocity to obtain overpressure measurement precision. The present application can accurately calculate the shock wave overpressure measurement precision of the optical measurement method, effectively solve the difficult problem of the wave velocity dependence on the overpressure measurement error uncertainty, and provide an effective basis for subsequent optical measurement method optimization and shock wave field three-dimensional measurement.

The application discloses a shock wave free field overpressure measurement method and system based on high-speed photography of a UAV, and relates to the field of shock wave measurement. Based on the refraction phenomenon of light caused by a wave front during propagation of a shock wave in air, high-speed photography of a ground explosion process is performed by using a high-speed camera of a UAV, an image difference value algorithm and an edge recognition algorithm are used to determine the wave front of each frame of shock wave image, the propagation speed of the wave front in air is obtained, analysis and measurement of the shock wave wave front are realized, and then the shock wave free field overpressure is obtained.

The application discloses a kind of limited space combustion consequence prediction methods based on gas leakage process dynamic parameter, collect every working condition from gas leakage starts every Δt time period concentration, velocity segmented time series data;Form three-dimensional primary ignition source array, according to the result of numerical simulation of combustion and explosion to simplify ignition source array;Get the maximum temperature field, static pressure field and dynamic pressure field data set on typical cross section in combustion process;Concentration, velocity segmented time series data set is mapped to maximum temperature field, static pressure field and dynamic pressure field data set, obtain combustible gas leakage explosion combustion consequence prediction data set, preliminary establish combustion consequence prediction model and train;Collect gas leakage concentration, velocity time series data in limited space input combustion consequence prediction model, obtain the maximum value field of combustion process temperature, static pressure and dynamic pressure.The application realizes real-time or super real-time combustible gas leakage in limited space after combustion process in the maximum overpressure, dynamic pressure and temperature field automatic prediction, and prediction result is accurate.

The invention discloses an explosion overpressure calculation method suitable for an end plugging tunnel. The explosion overpressure calculation method comprises the steps that 1, the position LD of an end effect demarcation point is determined; step 2, calculating a first overpressure peak value PF; 3, according to the distance LBC from the target to the explosion center, the distance Lmax from the tunnel blocking end to the explosion center and the reflected wave overpressure PF, r on the tunnel blocking face, the end reflection overpressure peak PER is calculated; and step 4, comparing the LBC with the LD, and calculating the maximum overpressure Pmax borne by the target. The method comprises the following steps: determining an end reflection effect demarcation point LD and an end reflection overpressure PER; when the explosion center distance LBC does not exceed the LD, the maximum overpressure in the tunnel is determined by a first overpressure peak value; and when the explosion center distance is greater than LD, the maximum overpressure in the tunnel is determined by an end reflection overpressure peak value, so that the target maximum overpressure of the shock waves in the blocked tunnel can be accurately calculated, and the calculation error does not exceed 10%.

The invention discloses a hydrogen energy ship cabin hydrogen detonation overpressure calculation method considering a vertical concentration gradient, and relates to the technical field of hydrogen energy ship cabin hydrogen detonation disaster assessment, and the method comprises the steps: obtaining a hydrogen concentration gradient vector in a ventilation cabin in a vertical direction, and a height coordinate vector of a hydrogen concentration measurement point; calculating the average hydrogen volume fraction in the ventilation cabin; according to the average hydrogen volume fraction, the hydrogen detonation overpressure is calculated according to non-uniform hydrogen flammable gas cloud detonation, or the hydrogen detonation overpressure is calculated according to hydrogen release plume ignition, and the problem that in the prior art, a method for evaluating the hydrogen explosion overpressure in the ventilation cabin under the natural ventilation condition is lacked is solved; the hydrogen concentration gradient in the vertical direction is considered, the detonation overpressure of the hydrogen flammable gas cloud with the non-uniform concentration under the real engineering condition can be evaluated, and the method has important practical significance for guiding the evaluation of the hydrogen explosion disaster consequence in the ventilation cabin.

The invention belongs to the technical field of shock wave overpressure test and data analysis, and particularly relates to a shock wave overpressure measurement precision evaluation method based on a high-speed camera system. The method comprises the following steps: S1, constructing a shock wave velocity measurement error model based on optical parameters of a high-speed camera system; s2, calculating a zero-order overpressure measurement error value based on a shock wave velocity measurement error model; s3, calculating a physical space wave velocity and an undisturbed air sound velocity based on the explosion image sequence collected by the high-speed camera system; and S4, calculating a speed correction factor based on the physical space wave velocity and the undisturbed air sound velocity, and obtaining the overpressure measurement precision. According to the method, the shock wave overpressure measurement precision of the optical measurement method can be accurately calculated, the difficult problem that the uncertainty of wave velocity dependence on overpressure measurement errors is large is effectively solved, and an effective basis is provided for follow-up optical measurement method optimization, shock wave field three-dimensional measurement and the like.

This invention discloses a method, system, and equipment for determining the safe distance of air shock waves during tunnel blasting excavation, relating to the field of tunnel blasting excavation. The method includes: determining the overpressure safety control standard ΔP0 for air shock waves; calculating the overpressure ΔP1 of the air shock wave propagating along the tunnel and the overpressure ΔP2 of the air shock wave at the tunnel entrance based on blasting design parameters and tunnel characteristic parameters; calculating the overpressure ΔP3 of the air shock wave at any distance along the tunnel axis in an open-air environment at the tunnel entrance based on ΔP2; drawing a nomogram of the safe distance of the air shock wave action within the tunnel based on ΔP0 and ΔP1, and determining the first safe distance based on the nomogram; drawing an isopleth map of the air shock wave overpressure based on ΔP3, and determining the second safe distance based on ΔP0 and the isopleth map. This invention eliminates the need for extensive blasting tests, providing a new approach for the safety protection of blasting air shock waves near the tunnel face and entrance.

The present application relates to a kind of ammunition danger assessment method, belong to the technical field of shell explosive. Including: the reaction intensity expression of constrained charge and its normalized function are constructed;Based on energy method, shell crushing energy, shell kinetic energy, air shock wave overpressure and its corresponding reaction degree are obtained, and terminal state reaction degree is obtained;Based on terminal state reaction degree and reaction time, maximum reaction rate is obtained;Based on terminal state reaction degree and maximum reaction rate, the reaction intensity of constrained charge and its normalized value are obtained;Based on the normalized value of the reaction intensity of constrained charge, the corresponding danger score of constrained charge under different IM accidental stimulation and the total score of danger are obtained.The method obtains the reaction intensity of constrained charge and its normalized value by establishing the reaction intensity expression of constrained charge, and obtains the corresponding danger score under different IM accidental stimulation and the total score of danger based on the normalized value, solves the problem of lacking the method for quantitatively evaluating the danger of ammunition under accidental stimulation.

The invention relates to the technical field of pipeline gas explosion venting, in particular to a simulation method for venting of a square pipeline with a lateral guide pipe. The method comprises the following steps: S1, establishing a pipeline model comprising a main pipeline and a plurality of lateral conduits, and establishing an external environment area in a preset range outside the pipeline model; s2, performing grid division on the pipeline model; s3, importing a grid file, and setting a basic model; s4, setting a component transportation model, boundary conditions, a pressure and speed coupling method, a discrete method and overpressure and temperature monitoring; s5, an ignition area is established, and design is initialized; and S6, iterative calculation is carried out, post-processing is carried out on a calculation result, explosion overpressure and flame wave characteristics are obtained, and a flow field flow trace is displayed. The method solves the problem that discharge safety is not considered in existing pipeline explosion venting, and a theoretical basis is provided for engineering protection measures.