Fuel gas explosion accident evaluation method and device and storage medium

Abstract

The invention discloses a gas explosion accident assessment method and device and a storage medium, and belongs to the technical field of safety assessment. The method comprises the following steps: obtaining building geometry and field damage conditions involved in a gas explosion accident; estimating an overpressure peak value range at the position of the damaged component in the field damage condition in combination with the anti-explosion capability of a typical component; according to the building geometry and the on-site damage condition, constructing a numerical calculation model by using a computer simulation technology; setting a plurality of monitoring points for the numerical calculation model, simulating a gas explosion accident to obtain gas explosion load distribution of each monitoring point, and comparing and analyzing the gas explosion load distribution to obtain an evaluation result; and outputting the evaluation result in a report form to obtain an evaluation report of the gas explosion accident. According to the method, the consequence of the gas explosion accident is systematically evaluated by combining the anti-explosion capability of the typical component, and the scientificity, the reliability and the usability of the evaluation method are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of safety assessment, and in particular relates to a gas explosion accident assessment method, equipment and storage medium. Background Art

[0002] In recent years, with the widespread use of natural gas, gas consumption has increased annually. At the same time, gas pipelines in residential buildings can experience accidental leaks due to aging equipment and improper operation. Furthermore, combustible gas clouds formed in poorly ventilated conditions are prone to explosions when exposed to open flames, often causing significant losses. Therefore, developing a scientific, reliable, and easy-to-use explosion accident assessment method is of great practical significance, as it can provide technical guidance for pre-disaster prevention, disaster protection, and post-disaster rescue. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method, device and storage medium for evaluating gas explosion accidents. By combining the explosion resistance of typical components, the consequences of gas explosion accidents are systematically evaluated, thereby improving the scientificity, reliability and ease of use of the evaluation method.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a method for assessing a gas explosion accident, the method comprising: Obtain the geometry of buildings involved in gas explosion incidents and on-site damage; Based on the explosion resistance of typical components, estimate the peak overpressure range at the location of the damaged component in the on-site damage situation; Based on the building geometry, including the layout of the buildings where the gas explosion occurred, the arrangement and size of obstacles, and the open and closed status of doors and windows; the on-site damage, including the damaged components of the building where the gas explosion occurred and its surroundings (including building beams, slabs, columns, masonry walls, doors and windows, glass, personnel, etc.), as well as the location, material properties, size and boundary conditions of the damaged components; a numerical calculation model is constructed using computer simulation technology; Setting a plurality of monitoring points for the numerical calculation model, obtaining the gas explosion load distribution at each monitoring point by simulating a gas explosion accident, and performing comparative analysis on the gas explosion load distribution to obtain an evaluation result; The evaluation result is output in the form of a report to obtain an evaluation report of the gas explosion accident.

[0005] In combination with the first aspect, further, the method of setting multiple monitoring points for the numerical calculation model, simulating a gas explosion accident to obtain the gas explosion load distribution at each monitoring point, and performing comparative analysis on the gas explosion load distribution to obtain an evaluation result includes: Setting a plurality of monitoring points in the building, and repeatedly performing the estimation configuration, simulation calculation, and judgment steps until the gas explosion overpressure load at the location of the damaged component at the monitoring point in the building is within the overpressure peak range; Set up multiple monitoring points outside the building, perform estimated configuration, simulation calculation and evaluation steps, and obtain evaluation results.

[0006] In combination with the first aspect, further, the steps of performing estimated configuration, simulation calculation, and judgment include: By estimating and configuring the ignition source position, gas leakage and gas concentration distribution in the numerical calculation model; The numerical calculation model is used to simulate gas explosion accidents to obtain the gas explosion load distribution at monitoring points in each building; Determine whether the gas explosion overpressure load at the location of the damaged component in the monitoring point in the building is within the overpressure peak range.

[0007] In combination with the first aspect, further, the steps of performing estimated configuration, simulation calculation, and evaluation include: By estimating and configuring the ignition source position, gas leakage and gas concentration distribution in the numerical calculation model; The numerical calculation model is used to simulate a gas explosion accident to obtain the gas explosion load distribution at each monitoring point outside the building; Combined with the criteria for determining personal injury, assess the safety range and damage extent of gas explosion accidents; The types of personal injury include no injury, 50% adult tympanic membrane perforation, or 100% tympanic membrane rupture. The criteria for determining personal injury include: When the type of injury to the personnel is no injury, the gas explosion overpressure load is 30 kPa; When the type of injury is 50% adult tympanic membrane perforation, the gas explosion overpressure load is 66.2 kPa; When the type of injury to the personnel is 100% rupture of the eardrum, the overpressure load of the gas explosion is 100 kPa.

[0008] In combination with the first aspect, further, the building geometry includes the layout of the houses, the arrangement and size of obstacles, and the switch status of doors and windows in the building where the gas explosion occurred; the on-site damage situation includes the damaged components around the building where the gas explosion occurred and the position, material properties, size and boundary conditions of the damaged components.

[0009] In combination with the first aspect, further, the typical component explosion resistance includes the explosion resistance of a masonry wall, wherein the length of the masonry wall is 2 meters, the height is 3 meters, the masonry block type is a clay wall or an air brick wall, the wall thickness is 115 mm, 120 mm, 150 mm or 240 mm, and the wall type is a one-way wall or a two-way wall; The explosion resistance of the masonry wall includes: When the masonry block type is a clay wall, the wall thickness is 115 mm, and the wall type is a one-way wall, the explosion-resistant overpressure peak of the masonry wall is 14.5 kPa; When the masonry block type is a clay wall, the wall thickness is 115 mm, and the wall type is a two-way wall, the explosion-resistant overpressure peak of the masonry wall is 26 kPa; When the masonry block type is a clay wall, the wall thickness is 240 mm, and the wall type is a one-way wall, the explosion-resistant overpressure peak of the masonry wall is 29.4 kPa; When the masonry block type is a clay wall, the wall thickness is 240 mm, and the wall type is a two-way wall, the explosion-resistant overpressure peak of the masonry wall is 93.6 kPa; When the masonry block type is an air brick wall, the wall thickness is 120 mm, and the wall type is a one-way wall, the explosion-resistant overpressure peak of the masonry wall is 10.2 kPa; When the masonry block type is an air brick wall, the wall thickness is 150 mm, and the wall type is a one-way wall, the explosion-resistant overpressure peak of the masonry wall is 11.8 kPa; In combination with the first aspect, further, the typical component explosion resistance includes glass explosion resistance, wherein the size of the glass is 1500 mm × 600 mm, the glass type is float glass or tempered glass, and the glass thickness is 6 mm, 8 mm or 10 mm; The glass explosion resistance includes: When the glass type is float glass and the glass thickness is 6 mm, the explosion-resistant overpressure peak value of the glass is 18.3 kPa; When the glass type is float glass and the glass thickness is 8 mm, the explosion-resistant overpressure peak value of the glass is 26.4 kPa; When the glass type is float glass and the glass thickness is 10 mm, the explosion-resistant overpressure peak value of the glass is 32.2 kPa; When the glass type is tempered glass and the glass thickness is 6 mm, the explosion-resistant overpressure peak value of the glass is 59.3 kPa; When the glass type is tempered glass and the glass thickness is 8 mm, the explosion-resistant overpressure peak value of the glass is 86.4 kPa; When the glass type is tempered glass and the glass thickness is 10 mm, the explosion-resistant overpressure peak value of the glass is 112 kPa.

[0010] In combination with the first aspect, further, the explosion resistance of the typical component includes the explosion resistance of a precast hollow slab, wherein the hollow slab hole spacing of the precast hollow slab is 30 mm, and the steel bars of the precast hollow slab are HPB 235 steel bars with a diameter of 4.5 mm, double-layer bidirectional reinforcement, the spacing in the length direction is 200 mm, the spacing in the width direction is 110 mm, the cover thickness is 20 mm, the thickness of the precast hollow slab is 120 mm, 150 mm or 180 mm, the concrete grade is C20, C30 or C40, and the span of the precast hollow slab is 3 meters, 3.3 meters, 3.6 meters or 3.9 meters; The explosion-resistant capabilities of the prefabricated hollow-core slab include: When the thickness of the precast hollow slab is 120 mm, the concrete grade is C20, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 21 kPa, 17 kPa, 15.5 kPa, or 13 kPa, respectively; When the thickness of the precast hollow slab is 120 mm, the concrete grade is C30, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 24 kPa, 21 kPa, 17 kPa, or 16 kPa, respectively; When the thickness of the precast hollow slab is 120 mm, the concrete grade is C40, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 26.5 kPa, 22.5 kPa, 19 kPa, or 17 kPa, respectively; When the thickness of the precast hollow slab is 150 mm, the concrete grade is C20, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 25.5 kPa, 21.5 kPa, 18 kPa, or 16 kPa, respectively; When the thickness of the precast hollow slab is 150 mm, the concrete grade is C30, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 35 kPa, 29 kPa, 24 kPa, or 20 kPa, respectively; When the thickness of the precast hollow slab is 150 mm, the concrete grade is C40, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 38 kPa, 32 kPa, 28.5 kPa, or 26 kPa, respectively; When the thickness of the precast hollow slab is 180 mm, the concrete grade is C20, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 36.5 kPa, 29.5 kPa, 26.5 kPa, or 25 kPa, respectively; When the thickness of the precast hollow slab is 180 mm, the concrete grade is C30, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 38 kPa, 32.5 kPa, 29.5 kPa, or 27.5 kPa, respectively; When the thickness of the precast hollow slab is 180 mm, the concrete grade is C40, and the span of the precast hollow slab is 3 meters, 3.3 meters, 3.6 meters, or 3.9 meters, respectively, the explosion-resistant overpressure peak value of the precast hollow slab is 41.5 kPa, 37 kPa, 33 kPa, or 29 kPa, respectively.

[0011] In a second aspect, the present invention further provides a computer device comprising a storage medium and a processor; The storage medium is used to store instructions; The processor is used to operate according to the instructions to execute the steps of any method described in the first aspect.

[0012] In a third aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the methods described in the first aspect.

[0013] Compared with the prior art, the present invention can at least achieve the following beneficial effects: The gas explosion accident assessment method provided by the present invention combines the explosion resistance of typical components, uses a numerical calculation model to simulate gas explosion accidents, and conducts a comparative analysis of explosion loads. It systematically evaluates the consequences of gas explosion accidents, improves the scientific nature, reliability and ease of use of the assessment method, and can provide a scientific basis and technical support for accident rescue, loss estimation and the formulation of preventive measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a flow chart of a method for evaluating a gas explosion accident provided by an embodiment of the present invention; Figure 2This is a detailed flow chart of a gas explosion accident assessment method provided by an embodiment of the present invention; Figure 3 This is a diagram of the internal structure of a computer device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Example 1:

[0017] This embodiment provides a method for evaluating a gas explosion accident. Figure 1 FIG. 1 is a flow chart of the method provided in this embodiment, which mainly includes the following steps: Step S1: Obtain the geometry of the buildings involved in the gas explosion accident and the on-site damage situation; Step S2: estimating the overpressure peak range at the location of the damaged component in the on-site damage situation based on the explosion resistance of typical components; Step S3: construct a numerical calculation model using computer simulation technology based on the building geometry and on-site damage conditions; Step S4: setting multiple monitoring points for the numerical calculation model, simulating a gas explosion accident, obtaining the gas explosion load distribution at each monitoring point, and performing comparative analysis on the gas explosion load distribution to obtain an evaluation result; Step S5: Output the assessment result in the form of a report to obtain an assessment report of the gas explosion accident.

[0018] Specifically, the building geometry acquired in step S1 primarily includes the layout of the buildings within the gas explosion accident, the placement and dimensions of obstacles, and the open and closed status of doors and windows. The on-site damage information acquired primarily includes the damaged components surrounding the building where the gas explosion occurred, as well as their locations, material properties, dimensions, and boundary conditions. Furthermore, relevant data such as the type, quantity, ignition conditions, and environmental conditions of the gas within the building where the gas explosion occurred can also be acquired.

[0019] In this embodiment, step S2 proposes a calculation of the explosion resistance of typical components, primarily covering masonry walls, glass, reinforced concrete slabs, and other typical components, using the peak overpressure at component failure as an indicator. Masonry walls are the most common components in buildings, and their explosion resistance is of great significance for the calculation and disaster assessment of gas explosions in buildings. This embodiment proposes a calculation of the explosion resistance of masonry walls with a length of 2 meters and a height of 3 meters, a clay wall or air brick wall type, a wall thickness of 115 mm, 120 mm, 150 mm, or 240 mm, and a wall type of one-way wall or two-way wall. Referring to Table 1, when the masonry block type is clay wall, the wall thickness is 115 mm and the wall type is one-way wall or two-way wall, the peak explosion overpressure of the masonry wall is 14.5 kPa or 26 kPa respectively; when the masonry block type is clay wall, the wall thickness is 240 mm and the wall type is one-way wall or two-way wall, the peak explosion overpressure of the masonry wall is 29.4 kPa or 93.6 kPa respectively; when the masonry block type is air brick wall, the wall thickness is 120 mm and the wall type is one-way wall or two-way wall, the peak explosion overpressure of the masonry wall is 10.2 kPa or 4.3 kPa respectively; when the masonry block type is aerated brick wall, the wall thickness is 150 mm and the wall type is one-way wall or two-way wall, the peak explosion overpressure of the masonry wall is 11.8 kPa or 5.2 kPa respectively.

[0020] Furthermore, glass is also widely used in architecture. This example uses ANSYS software to perform a pseudo-static analysis on a glass frame with dimensions of 1500 mm x 600 mm, either float glass or tempered glass, and thicknesses of 6 mm, 8 mm, or 10 mm, fixed on all four sides. This analysis results in a glass explosion resistance analysis. Referring to Table 2, when the glass is float glass and has a thickness of 6 mm, 8 mm, or 10 mm, the peak explosion overpressures are 18.3 kPa, 26.4 kPa, or 32.2 kPa, respectively. When the glass is tempered glass and has a thickness of 6 mm, 8 mm, or 10 mm, the peak explosion overpressures are 59.3 kPa, 86.4 kPa, or 112 kPa, respectively.

[0021]

[0022] Table 1 Glass explosion resistance As an example, reinforced concrete slabs are also an important component of buildings and can be divided into cast-in-place slabs, precast slabs, and prefabricated slabs. This example proposes a precast hollow slab with improved explosion resistance, with a hole spacing of 30 mm, HPB 235 steel bars with a diameter of 4.5 mm, double-layer bidirectional reinforcement, a spacing of 200 mm in the length direction and 110 mm in the width direction, a protective layer thickness of 20 mm, a precast hollow slab thickness of 120 mm, 150 mm, or 180 mm, a concrete grade of C20, C30, or C40, and a span of 3 meters, 3.3 meters, 3.6 meters, or 3.9 meters.With reference to Table 3, when the thickness of the precast hollow slab is 120 mm, the concrete grade is C20 and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m or 3.9 m, the peak overpressure of the explosion-proof precast hollow slab is 21 kPa, 17 kPa, 15.5 kPa or 13 kPa respectively; when the thickness of the precast hollow slab is 120 mm, the concrete grade is C30 and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m or 3.9 m respectively, the peak overpressure of the explosion-proof precast hollow slab is 24 kPa, 21 kPa, 17 kPa or 16 kPa respectively; when the thickness of the precast hollow slab is 120 mm, the concrete grade is C40 and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m or 3.9 m respectively 0 and the span of the precast hollow slab is 3 meters, 3.3 meters, 3.6 meters or 3.9 meters respectively, the peak overpressure of the explosion resistance of the precast hollow slab is 26.5 kPa, 22.5 kPa, 19 kPa or 17 kPa respectively; when the thickness of the precast hollow slab is 150 mm, the concrete grade is C20 and the span of the precast hollow slab is 3 meters, 3.3 meters, 3.6 meters or 3.9 meters respectively, the peak overpressure of the explosion resistance of the precast hollow slab is 25.5 kPa, 21.5 kPa, 18 kPa or 16 kPa respectively; when the thickness of the precast hollow slab is 150 mm, the concrete grade is C30 and the span of the precast hollow slab is 3 meters, 3.3 meters, 3.6 meters or 3.9 meters respectively, the peak overpressure of the explosion resistance of the precast hollow slab is 2 When the thickness of the precast hollow slab is 150 mm, the concrete grade is C40 and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m or 3.9 m, the peak overpressure of the explosion-proof precast hollow slab is 35 kPa, 29 kPa, 24 kPa or 20 kPa respectively; when the thickness of the precast hollow slab is 150 mm, the concrete grade is C40 and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m or 3.9 m respectively, the peak overpressure of the explosion-proof precast hollow slab is 38 kPa, 32 kPa, 28.5 kPa or 26 kPa respectively; when the thickness of the precast hollow slab is 180 mm, the concrete grade is C20 and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m or 3.9 m respectively, the peak overpressure of the explosion-proof precast hollow slab is 36.5 kPa, 38 kPa, 32 kPa, 28.5 kPa or 26 kPa respectively kPa, 29.5 kPa, 26.5 kPa or 25 kPa; when the thickness of the precast hollow slab is 180 mm, the concrete grade is C30 and the span of the precast hollow slab is 3 meters, 3.3 meters, 3.6 meters or 3.9 meters respectively, the peak overpressure resistance of the precast hollow slab is 38 kPa, 32.5 kPa, 29.5 kPa or 27.5 kPa respectively; when the thickness of the precast hollow slab is 180 mm, the concrete grade is C40 and the span of the precast hollow slab is 3 meters, 3.3 meters, 3.6 meters or 3.9 meters respectively, the peak overpressure resistance of the precast hollow slab is 41.5 kPa, 37 kPa, 33 kPa or 29 kPa respectively.

[0023]

[0024] Table 2 Explosion resistance of prefabricated hollow slabs It should be noted that the computer simulation technology in step S3 can be simulated using FLACS software, LS-DYNA software, FLUENT software or other commercial or open source numerical calculation software, but the numerical calculation software used must be reasonably verified and the results must be reliable.

[0025] As an optional embodiment, combined with Figure 2 , further detailed description is given of how to set multiple monitoring points for the numerical calculation model in step S4, obtain the gas explosion load distribution of each monitoring point by simulating a gas explosion accident, and perform comparative analysis on the gas explosion load distribution to obtain the evaluation results: Step S401: setting multiple monitoring points in the building; Step S402: estimating and configuring the ignition source position, gas leakage, and gas concentration distribution in the numerical calculation model; Step S403: simulating a gas explosion accident using a numerical calculation model to obtain the gas explosion load distribution at monitoring points in each building; Step S404: determining whether the gas explosion overpressure load at the location of the damaged component in the monitoring point in the building is within the overpressure peak range; Step S405: In response to the gas explosion overpressure load not being within the overpressure peak range, repeating the above steps S402 to S404 until the gas explosion overpressure load at the location of the damaged component in the monitoring point in the building is within the overpressure peak range; Step S406: setting multiple monitoring points outside the building; Step S407: estimating and configuring the ignition source position, gas leakage, and gas concentration distribution in the numerical calculation model; Step S408: simulating a gas explosion accident using a numerical calculation model to obtain the gas explosion load distribution at each monitoring point outside the building; Step S409: Evaluate the safety range and damage degree of the gas explosion accident in combination with the personnel injury determination criteria.

[0026] It should be noted that before performing the simulation calculation in step S408, it is necessary to estimate difficult-to-obtain data such as the ignition source location, ignition energy, gas leakage volume, and gas concentration distribution in step S407 to serve as a basis for numerical calculation adjustments. Furthermore, in the event of a gas explosion in a building, direct damage to human organs from the effects of the explosion overpressure and flame burns cannot be ignored. This embodiment only considers the criteria for determining injuries to personnel under explosion overpressure. When the injury type is no injury, the gas explosion overpressure load is 30 kPa; when the injury type is 50% adult tympanic membrane perforation, the gas explosion overpressure load is 66.2 kPa; and when the injury type is 100% tympanic membrane rupture, the gas explosion overpressure load is 100 kPa.

[0027] Furthermore, the gas explosion accident assessment report output in step S5 mainly includes an overview of the gas explosion accident, the assessment process, the assessment results, and preventive recommendations. The assessment results include the safety range of the gas explosion accident, the degree of damage, the possibility of the accident, the severity of the accident consequences, and the social impact.

[0028] The gas explosion accident assessment method provided in this embodiment estimates the overpressure peak range at the location of the damaged component based on acquired accident investigation data and the explosion resistance of typical components (masonry walls, glass, and prefabricated hollow slabs) to serve as a verification parameter for subsequent numerical calculations. The gas explosion accident is simulated by adjusting the parameters of the numerical calculation model to calculate the gas explosion load distribution inside and outside the building. By comparing and analyzing the gas explosion load distribution inside and outside the building, the consequences of the gas explosion accident are systematically evaluated, improving the scientific nature, reliability, and ease of use of the assessment method, and can provide a scientific basis and technical support for accident rescue, loss estimation, and the formulation of preventive measures.

[0029] Figure 1 Only the logical sequence of the method described in this embodiment is shown. In other possible embodiments of the present invention, different methods may be used without conflict. Figure 1 The steps shown or described are performed in the order shown. The gas explosion accident assessment method provided in this embodiment can be applied to a terminal and can be performed by a gas explosion accident assessment device, which can be implemented by software and / or hardware and can be integrated into a terminal, such as any smartphone, tablet computer, or computer device with communication capabilities. Example 2:

[0030] This embodiment also provides a computer device, which can be a server, and its internal structure can be as shown in FIG. Figure 3As shown. The computer device includes a processor, a memory, an input / output interface (I / O), and a communication interface. The processor, memory, and I / O interface are connected via a system bus, and the communication interface is connected to the system bus via the I / O interface.

[0031] The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store data acquired and generated during the method of autonomously entering a packaging container by a robot. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal via a network connection. When executed by the processor, the computer program implements the method of the aforementioned embodiment 1.

[0032] Those skilled in the art will understand that Figure 3 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0033] The computer device provided in this embodiment can execute the gas explosion accident assessment method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. Example 3:

[0034] This embodiment further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the method described in the first embodiment are implemented.

[0035] The computer-readable storage medium provided in this embodiment can execute the gas explosion accident assessment method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0036] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0037] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0038] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0039] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0040] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all protected by the present invention.

Claims

1. A method for evaluating a gas explosion accident, characterized in that: The method comprises: Obtain the geometry of buildings involved in gas explosion incidents and on-site damage; Based on the explosion resistance of typical components, estimate the peak overpressure range at the location of the damaged component in the on-site damage situation; Based on the building geometry, including the layout of the buildings where the gas explosion occurred, the arrangement and size of obstacles, and the open and closed status of doors and windows; the on-site damage, including the damaged components of the building where the gas explosion occurred and its surroundings, as well as the location, material properties, size, and boundary conditions of the damaged components; a numerical calculation model is constructed using computer simulation technology; Setting a plurality of monitoring points for the numerical calculation model, obtaining the gas explosion load distribution at each monitoring point by simulating a gas explosion accident, and performing comparative analysis on the gas explosion load distribution to obtain an evaluation result; The evaluation result is output in the form of a report to obtain an evaluation report of the gas explosion accident.

2. The gas explosion accident assessment method according to claim 1, characterized in that: The method of setting a plurality of monitoring points for the numerical calculation model, obtaining the gas explosion load distribution at each monitoring point by simulating a gas explosion accident, and performing comparative analysis on the gas explosion load distribution to obtain an evaluation result includes: Setting a plurality of monitoring points in the building, and repeatedly performing the estimation configuration, simulation calculation, and judgment steps until the gas explosion overpressure load at the location of the damaged component at the monitoring point in the building is within the overpressure peak range; Set up multiple monitoring points outside the building, perform estimated configuration, simulation calculation and evaluation steps, and obtain evaluation results.

3. The gas explosion accident assessment method according to claim 2, characterized in that: The steps of performing estimated configuration, simulation calculation and judgment include: By estimating and configuring the ignition source position, gas leakage and gas concentration distribution in the numerical calculation model; The numerical calculation model is used to simulate gas explosion accidents to obtain the gas explosion load distribution at monitoring points in each building; Determine whether the gas explosion overpressure load at the location of the damaged component in the monitoring point in the building is within the overpressure peak range.

4. The gas explosion accident assessment method according to claim 2, characterized in that: The steps of performing estimated configuration, simulation calculation and evaluation include: By estimating and configuring the ignition source position, gas leakage and gas concentration distribution in the numerical calculation model; The numerical calculation model is used to simulate a gas explosion accident to obtain the gas explosion load distribution at each monitoring point outside the building; Combined with the criteria for determining personal injury, assess the safety range and damage extent of gas explosion accidents; The types of personal injury include no injury, 50% adult tympanic membrane perforation, or 100% tympanic membrane rupture. The criteria for determining personal injury include: When the type of injury to the personnel is no injury, the gas explosion overpressure load is 30 kPa; When the type of injury is 50% adult tympanic membrane perforation, the gas explosion overpressure load is 66.2 kPa; When the type of injury to the personnel is 100% rupture of the eardrum, the overpressure load of the gas explosion is 100 kPa.

5. The gas explosion accident assessment method according to claim 1, characterized in that: The building geometry includes the layout of the houses, the arrangement and dimensions of obstacles, and the open and closed status of doors and windows in the building where the gas explosion occurred; the on-site damage situation includes the damaged components of the building where the gas explosion occurred and its surroundings (including building beams, slabs, columns, masonry walls, doors and windows, glass, personnel, etc.) and the location, material properties, dimensions and boundary conditions of the damaged components.

6. The gas explosion accident assessment method according to claim 1, characterized in that: The typical component explosion resistance includes the explosion resistance of masonry walls, wherein the height of the masonry wall is 3 meters, the masonry block type is clay wall or aerated brick wall, the wall thickness is 115 mm, 120 mm, 150 mm or 240 mm, and the wall type is one-way wall or two-way wall; The explosion resistance of the masonry wall includes: When the masonry block type is a clay wall, the wall thickness is 115 mm, and the wall type is a one-way wall, the explosion-resistant overpressure peak of the masonry wall is 14.5 kPa; When the masonry block type is a clay wall, the wall thickness is 115 mm, and the wall type is a two-way wall, the explosion-resistant overpressure peak of the masonry wall is 26 kPa; When the masonry block type is a clay wall, the wall thickness is 240 mm, and the wall type is a one-way wall, the explosion-resistant overpressure peak of the masonry wall is 29.4 kPa; When the masonry block type is a clay wall, the wall thickness is 240 mm, and the wall type is a two-way wall, the explosion-resistant overpressure peak of the masonry wall is 93.6 kPa; When the masonry block type is an air brick wall, the wall thickness is 120 mm, and the wall type is a one-way wall, the explosion-resistant overpressure peak of the masonry wall is 10.2 kPa; When the masonry block type is an air brick wall, the wall thickness is 150 mm, and the wall type is a one-way wall, the explosion-resistant overpressure peak value of the masonry wall is 11.8 kPa.

7. The gas explosion accident assessment method according to claim 1, characterized in that: The typical component explosion resistance includes glass explosion resistance, wherein the glass size is 1500 mm × 600 mm, the glass type is float glass or tempered glass, and the glass thickness is 6 mm, 8 mm or 10 mm; The glass explosion resistance includes: When the glass type is float glass and the glass thickness is 6 mm, the explosion-resistant overpressure peak value of the glass is 18.3 kPa; When the glass type is float glass and the glass thickness is 8 mm, the explosion-resistant overpressure peak value of the glass is 26.4 kPa; When the glass type is float glass and the glass thickness is 10 mm, the explosion-resistant overpressure peak value of the glass is 32.2 kPa; When the glass type is tempered glass and the glass thickness is 6 mm, the explosion-resistant overpressure peak value of the glass is 59.3 kPa; When the glass type is tempered glass and the glass thickness is 8 mm, the explosion-resistant overpressure peak value of the glass is 86.4 kPa; When the glass type is tempered glass and the glass thickness is 10 mm, the explosion-resistant overpressure peak value of the glass is 112 kPa.

8. The gas explosion accident assessment method according to claim 1, wherein: The typical component explosion resistance includes the explosion resistance of a precast hollow-core slab, wherein the hollow-core slab of the precast hollow-core slab has a spacing of 30 mm, and the steel bars of the precast hollow-core slab are HPB 235 steel bars with a diameter of 4.5 mm, double-layer bidirectional reinforcement, a spacing of 200 mm in the length direction, a spacing of 110 mm in the width direction, a cover thickness of 20 mm, a thickness of the precast hollow-core slab of 120 mm, 150 mm or 180 mm, a concrete grade of C20, C30 or C40, and a span of 3 m, 3.3 m, 3.6 m or 3.9 m; The explosion-resistant capabilities of the prefabricated hollow-core slab include: When the thickness of the precast hollow slab is 120 mm, the concrete grade is C20, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 21 kPa, 17 kPa, 15.5 kPa, or 13 kPa, respectively; When the thickness of the precast hollow slab is 120 mm, the concrete grade is C30, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 24 kPa, 21 kPa, 17 kPa, or 16 kPa, respectively; When the thickness of the precast hollow slab is 120 mm, the concrete grade is C40, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 26.5 kPa, 22.5 kPa, 19 kPa, or 17 kPa, respectively; When the thickness of the precast hollow slab is 150 mm, the concrete grade is C20, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 25.5 kPa, 21.5 kPa, 18 kPa, or 16 kPa, respectively; When the thickness of the precast hollow slab is 150 mm, the concrete grade is C30, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 35 kPa, 29 kPa, 24 kPa, or 20 kPa, respectively; When the thickness of the precast hollow slab is 150 mm, the concrete grade is C40, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 38 kPa, 32 kPa, 28.5 kPa, or 26 kPa, respectively; When the thickness of the precast hollow slab is 180 mm, the concrete grade is C20, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 36.5 kPa, 29.5 kPa, 26.5 kPa, or 25 kPa, respectively; When the thickness of the precast hollow slab is 180 mm, the concrete grade is C30, and the span of the precast hollow slab is 3 m, 3.3 m, 3.6 m, or 3.9 m, respectively, the explosion-proof overpressure peak value of the precast hollow slab is 38 kPa, 32.5 kPa, 29.5 kPa, or 27.5 kPa, respectively; When the thickness of the precast hollow slab is 180 mm, the concrete grade is C40, and the span of the precast hollow slab is 3 meters, 3.3 meters, 3.6 meters, or 3.9 meters, respectively, the explosion-resistant overpressure peak value of the precast hollow slab is 41.5 kPa, 37 kPa, 33 kPa, or 29 kPa, respectively.

9. A computer device, characterized in that: including storage media and processors; The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the steps of the method according to any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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