61 results about "Overpressure" patented technology

The invention discloses a shock wave overpressure field global measurement method based on multi-view image fusion, belongs to the technical field of explosive shock wave measurement, and is suitable for weapon equipment power evaluation and blasting safety analysis. The method comprises the following steps of: synchronously acquiring a time sequence image of the whole explosion process through a distributed multi-view high-speed imaging system, preprocessing the image by adopting pixel-by-pixel comparison, square operation enhancement and normalization processing, and positioning a shock wave edge contour; the blasting center coordinate is positioned through binocular parallax, the shock wave initial radius is determined by combining spatial domain analysis, and the key feature points of the front and rear edges of the wavefront are detected by using a dynamic search window and a radial gradient field. Based on multi-view constraints, a three-dimensional point cloud is generated through direct linear triangulation, and a three-dimensional wave front form is reconstructed in combination with least square spherical fitting. And finally, constructing a wavefront radius-time evolution model, and deducing a quantitative relationship between the instantaneous propagation velocity and the peak overpressure in combination with a Ranki ne-Huton iot relationship, thereby realizing the global high-precision calculation of the overpressure field.

The invention discloses a gas leakage process dynamic parameter-based limited space combustion explosion consequence prediction method. The method comprises the following steps of: acquiring concentration and speed segmentation time sequence data in every delta t time period from gas leakage in each working condition; forming a three-dimensional primary ignition source array, and simplifying the ignition source array according to a blasting numerical simulation result; obtaining a maximum temperature field data set, a static pressure field data set and a dynamic pressure field data set on a typical section in the burning and explosion process; mapping the concentration and speed segmented time sequence data set to a maximum temperature field, static pressure field and dynamic pressure field data set to obtain a combustible gas leakage explosion result prediction data set, preliminarily establishing a combustion explosion result prediction model, and training; and collecting gas leakage concentration and speed time sequence data in the limited space, and inputting the data into the combustion explosion consequence prediction model to obtain a temperature, static pressure and dynamic pressure maximum value field in the combustion explosion process. According to the invention, automatic prediction of the maximum overpressure, the dynamic pressure and the temperature field in the explosion process after combustible gas leakage in a real-time or super-real-time limited space is realized, and the prediction result is accurate.

The invention relates to the field of hydrogen energy conveying safety, in particular to a method, device and equipment for estimating the explosion damage range of a hydrogen conveying pipeline. The method for estimating the explosion damage range of the hydrogen conveying pipeline comprises the following steps: acquiring physical parameters and environmental conditions of the hydrogen conveying pipeline; based on the physical parameters of the gas conveying pipeline, the isentropic expansion theory is adopted to calculate the explosion energy of the hydrogen conveying pipeline in unit length; calculating initial peak overpressure by adopting an exponential decay model on the basis of the explosion energy of the hydrogen conveying pipeline per unit length; based on environmental conditions, correcting the initial peak overpressure to obtain corrected peak overpressure; and determining a damage range based on the corrected peak overpressure. According to the method, the shock wave overpressure generated by explosion of the hydrogen conveying pipeline can be rapidly calculated, efficient, accurate and real-time damage range estimation is achieved in combination with environmental factor correction, and personnel injury and property loss caused by potential accidents are reduced.

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 discloses a square closed space combustible gas explosion overpressure prediction method and a processor, and relates to the technical field of combustible gas explosion overpressure prediction. The method comprises the following steps: firstly, assuming relevant parameters in the explosion process of the square closed space; establishing a simplified physical model according to flames development characteristics of combustible gas explosion in an experiment; then, according to the simplified physical model, combining with a control equation to obtain an explosion pressure prediction mathematical model; and finally, the engineering actual prediction initial parameters are substituted into the explosion pressure prediction mathematical model for calculation, and prediction values of the square confined space explosion overpressure in different explosion stages can be obtained. According to the invention, the explosion overpressure prediction model established by using the segmentation method has high conformity with an experimental result; according to the method, the explosion overpressure of the square closed space can be quickly predicted, and reliable reference basis is provided for combustible gas explosion disaster effect and consequence evaluation.

The application provides a kind of air shock wave and fragment composite injury rapid evaluation method and system, it is related to data processing technical field.The method comprises: obtaining explosion working condition parameters;According to the explosion working condition parameters, determine the peak value of air shock wave overpressure;According to the peak value of air shock wave overpressure, determine the damage probability value of air shock wave to personnel;According to the explosion working condition parameters, determine the initial velocity of fragment and the number of fragments;According to the initial velocity of fragment and the number of fragments, determine the damage probability value of fragment to personnel;Comprehensive air shock wave damage probability value of personnel and the damage probability value of fragment to personnel, evaluate air shock wave and fragment composite damage probability value.The application can quickly evaluate air shock wave and fragment composite damage probability value, the evaluation cost is low, the implementation difficulty is small, without complex biological modeling, evaluation time is short, can meet the timeliness demand of emergency treatment, can provide more rapid, convenient decision support for actual rescue.

The invention discloses a method for predicting the explosion intensity of a steam cloud based on a flame velocity. The method comprises the following steps: constructing a flame propagation prediction formula by integrating factors such as a gas cloud limitation degree, obstacle blockage, steam cloud activity and a flame propagation distance; collecting data in different scenes for fitting analysis, and determining values of undetermined parameters in the flame propagation prediction formula in different scenes; solving a flame propagation prediction formula to obtain a dimensionless flame velocity based on the value of the undetermined parameter in the target scene, and determining an actual flame velocity in combination with the sound velocity; based on the determined actual flame speed, predicting the explosion overpressure through a relational expression between the actual flame speed and the explosion overpressure established in the target scene; based on the predicted explosion overpressure, the explosion impulse is predicted through a relational expression between the explosion overpressure and the explosion impulse established in the target scene; and representing the explosion intensity of the steam cloud based on the predicted explosion overpressure and explosion impulse. The method is simple in process, high in reliability and wide in application range.

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 present application relates to a method for analyzing the surface load of a finite-size structure under the action of a far-field explosion wave, wherein the method comprises: determining shock wave parameters at a location of the finite-size structure based on explosion pressure parameters and environmental parameters, calculating the stagnation load on the surface of the structure and a first decay time history of the reflected overpressure based on the shock wave parameters; calculating the propagation speed of a diffraction wave on the surface of the structure based on the environmental parameters and the first decay time history, calculating the first moment when the diffraction wave reaches the target point and the second moment when the shock wave stagnates based on the speed and position parameters of the target point on the surface of the structure; calculating the second decay time history of the diffraction wave with respect to the reflected load based on the reflected overpressure on the surface of the structure at the first moment, the stagnation load at the second moment, the first moment, and the second moment; and determining the load time history of the target point based on the difference between the first decay time history and the second decay time history.

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 application discloses a blast furnace overpressure comprehensive protection method, comprising the following steps: monitoring the air pressure in the blast furnace and whether the blast furnace top pressure detection is distorted, obtaining the air pressure result and the distortion condition; and performing comprehensive protection according to the air pressure result and the distortion condition, wherein when the air pressure is higher than a threshold value, overpressure automatic control diffusion valves and blast furnace overpressure automatic air reduction functions are started; when the blast furnace top pressure detection is distorted, the dust removal system overpressure diffusion system diffusion and the blast furnace turbine unit static blade opening degree automatic control switching to manual opening degree function are started, and the blast furnace clean gas is reduced in pressure; and if the overpressure is distorted, an audible and visual alarm is sounded. The blast furnace overpressure comprehensive protection system can effectively protect the normal production of the blast furnace, prevent serious production loss, personal injury and environmental protection accidents caused by the blast furnace overpressure.

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.

This invention relates to a method, apparatus, medium, and equipment for analyzing the overpressure characteristic values ​​of combustible gas explosions in marine oil and gas production facilities. The analysis method includes the following steps: geometrically modeling the marine oil and gas production facility; calculating the congestion degree of the process area of ​​the marine oil and gas production facility; calculating the volume of the combustible gas cloud under different filling ratios in the process area of ​​the marine oil and gas production facility; performing transient CFD simulations of combustible gas explosions with varying gas cloud positions and ignition positions to obtain the overpressure value of the protected target changing over time; determining the maximum overpressure value of the protected target under combustible gas explosion conditions; expanding the sample and performing statistical analysis and characteristic value calculations to obtain probability density curves and characteristic values; and determining the explosion-proof level of the protected target according to protection requirements.

This invention discloses a physical enhancement and reconstruction method and system for explosion overpressure fields oriented towards sparse observations. It utilizes a pre-trained and optimized explosion overpressure sparse reconstruction model to physically enhance and reconstruct the on-site explosion overpressure field. The explosion overpressure sparse reconstruction model includes a sparse enhancement module, a feature identification module, a denoising module, and an output module. The sparse reconstruction method of this invention offers high reconstruction accuracy, strong generalization ability, and high efficiency, enabling high-precision reconstruction of the entire flow field of sparse overpressure data from explosion impacts in complex, multi-dimensional, and multi-scale scenarios.

The invention relates to the technical field of industrial control, in particular to a steam cloud explosion overpressure calculation method, system and equipment, a medium and a program product. According to the method, static data and dynamic data of a target area are obtained, event simulation is carried out, diffusion analogue simulation data representing the leakage dynamic diffusion process of leakage substances corresponding to a target event are obtained, and therefore overpressure calculation is carried out based on the diffusion analogue simulation data; explosion overpressure data representing pressure value distribution of the explosion shock waves at different positions of the target area are obtained, so that the accuracy and efficiency of overpressure data calculation are improved, and chemical production safety is guaranteed.

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) is arranged in the purge gas outlet (7) with a valve seat (16) and a valve body (30). 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 present invention discloses a device and method for evaluating the influence of nozzle structure on the thermal safety of solid motors, belonging to the field of solid motor testing technology. In the device of the present invention, the engine test piece includes a heating rod shell, a motor shell, a nozzle constraint and a propellant sample. The heating control system includes a heating rod, a heating control device, a heating rod shell thermocouple and a motor shell thermocouple. The laser schlieren system includes a continuous laser light source, an incident spherical mirror, an exit spherical mirror, a CCD high-speed camera, a slit and a filter. The pressure data acquisition system includes a chamber pressure sensor, a shock wave overpressure sensor, a multi-channel acquisition card and a computer. The present invention simulates the propellant thermal stimulation response process under the engine structural constraint state, and quantitatively characterizes the intensity of ignition and detonation of the propellant sample under thermal stimulation by measuring the shock wave overpressure and the chamber pressure in the engine shell. Combined with the response level criterion, a quantitative evaluation of the engine thermal safety response level is achieved.

This invention discloses a method and processor for predicting overpressure in a square confined space flammable gas explosion, relating to the field of flammable gas explosion overpressure prediction technology. The method includes: first, assuming relevant parameters during the explosion process in a square confined space; establishing a simplified physical model based on the flame development characteristics of flammable gas explosions in experiments; then, deriving a mathematical model for predicting explosion pressure based on the simplified physical model and the governing equations; finally, substituting the actual initial parameters from engineering predictions into the mathematical model for calculating explosion pressure, thus obtaining the predicted values ​​of overpressure at different stages of the explosion in the square confined space. The explosion overpressure prediction model established by this invention using a segmented method shows high agreement with experimental results; it can quickly predict the overpressure in a square confined space explosion, providing a reliable reference for assessing the hazard effects and consequences of flammable gas explosions.

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 a solid-containing chemical gas discharging device which comprises an exhaust pipe and a flame arrester, wherein the front end of the exhaust pipe is connected with a reactor, and the flame arrester is arranged in the exhaust pipe; the device is characterized in that a spraying head is arranged in the exhaust pipe on the front side of the flame arrester, a cleaning liquid conveying pipe penetrates through the exhaust pipe to be connected with the spraying head, and more than one liquid inlet control valve is arranged on the cleaning liquid conveying pipe; a gas purging pipe penetrates through the exhaust pipe, more than one gas inlet control valve is arranged on the gas purging pipe, and a gas conveying pipe is positioned at the tail end in the exhaust pipe and is arranged on the front side of the flame arrester; according to the utility model, the risk of overpressure caused by pipeline blockage can be prevented, accidents such as fire blast can be avoided, continuous and stable discharge can be realized, and the efficiency and safety of chemical production can be improved.

The application belongs to the technical field of explosion origin positioning, and discloses an explosion origin positioning method based on a shock wave overpressure time sequence signal. n According to an explosion test scheme or a region where an explosion accident may occur and needs to be monitored, not less than four shock wave overpressure monitoring points S1, S2, … S n are set, shock wave overpressure sensors are arranged at the S1, S2, … S i points, shock wave overpressure signals P i received by the shock wave overpressure sensors at the S points are monitored and stored in cycles, a theoretical expression of different distance arrival times is obtained according to time sequence signals of shock wave overpressure peak values at different points and air pressure, temperature and humidity conditions of an explosion region A, and the most possible explosion origin coordinates and errors are calculated in three-dimensional space by using a constraint optimization interior point algorithm and a nonlinear least square method. The explosion origin is positioned by using a shock wave overpressure signal propagation speed law, the anti-interference capability is high, the explosion origin is not easily affected by external factors, and the positioning result is high in accuracy.

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.

The invention provides an explosion early warning method and device for a gas leakage pipeline, and relates to the technical field of gas pipeline explosion early warning, and the method comprises the steps: inputting pipeline parameters corresponding to the gas leakage pipeline into a preset leakage pipeline model, and determining the leakage rate of a leakage point position on the gas leakage pipeline; based on the ground obstacle condition of the gas leakage pipeline at the leakage point position, determining a corresponding target model used for representing the gas concentration distribution at the leakage point position; wherein the target model comprises a Gaussian plume model and an elevated point source diffusion model; substituting the leakage rate into the target model, and determining the diffusion volume of the fuel gas at the leakage point position; judging whether the diffusion volume accords with a preset explosion volume range or not; if yes, the shock wave overpressure and the sweep range of explosion at the leakage point position are calculated based on the diffusion volume, and early warning is conducted on the influence of the shock wave overpressure, so that the technical problem that in the prior art, explosion early warning analysis of the gas leakage pipeline is not high in reliability is solved.

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.

The invention discloses a calculation method and system suitable for explosive multi-altitude shock wave overpressure compensation and a medium, and the method comprises the steps: determining the atmospheric parameters of a specified altitude according to the atmospheric parameters of the sea level; calculating the ratio of the air pressure at the specified altitude to the air pressure at the sea level, and determining the ratio as a shock wave overpressure proportionality coefficient; according to the shock wave overpressure proportionality coefficient, the specified explosion distance of the sea level and the equivalent value of the explosive, the actual explosive equivalent of the explosive at the specified explosion distance at the specified altitude is calculated, and under the action of the actual explosive equivalent, the shock wave overpressure generated at the specified explosion distance at the specified altitude is calculated; the shock wave overpressure is the same as the shock wave overpressure generated by the equivalent value of the specified explosion distance of the explosive on the sea level; the difference value between the actual explosive equivalent of the explosive at the specified explosion distance at the specified altitude and the explosive equivalent of the explosive at the sea level serves as the altitude compensation equivalent of the explosive, and accurate blasting of different types of explosives at different altitudes and elevations can be achieved.

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.