CN112784393A - Explosion overpressure evaluation method and device and storage medium - Google Patents
Explosion overpressure evaluation method and device and storage medium Download PDFInfo
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- 238000004880 explosion Methods 0.000 title claims abstract description 128
- 238000011156 evaluation Methods 0.000 title abstract description 13
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- 238000010586 diagram Methods 0.000 claims abstract description 9
- 230000000903 blocking effect Effects 0.000 claims description 22
- 238000004364 calculation method Methods 0.000 abstract description 11
- 239000007789 gas Substances 0.000 description 57
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 4
- 239000001273 butane Substances 0.000 description 4
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- 239000001294 propane Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
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- 229910052739 hydrogen Inorganic materials 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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Abstract
An embodiment of the present invention provides an explosion overpressure evaluation method, including: establishing a plurality of explosion overpressure curve relation graphs corresponding to the explosion gas cloud volume and the explosion source distance under different explosion source intensities; according to the intensity of the explosive source, matching an explosive overpressure curve relation graph corresponding to the intensity of the explosive source; and obtaining the explosion overpressure of the point location in the explosion overpressure curve relation diagram by a graph checking method according to the volume of the explosion gas cloud and the distance between the point location and the explosion source. An explosion overpressure assessment device is also provided. The technical scheme of the invention can avoid the complex calculation process of explosion overpressure, improve the analysis speed and avoid larger errors caused by an empirical judgment method.
Description
Technical Field
The invention relates to the technical field of safety, in particular to an explosion overpressure evaluation method, an explosion overpressure evaluation device and a corresponding storage medium.
Background
Petrochemical enterprises have a large number of process devices, and the explosion overpressure of the petrochemical enterprises needs to be calculated when the petrochemical enterprises perform work such as process layout, risk assessment, safety protection and the like. The calculation of explosion overpressure is a complex task, requiring a large amount of data, via complex simulation calculations. It is difficult for the engineer to master and is therefore not suitable for preliminary safety analysis of a large number of devices distributed within a petrochemical enterprise.
MEM (Multi-Energy Method) belongs to a typical scaling explosion prediction model, is a vapor cloud explosion effect prediction model established based on a large amount of experiments and numerical researches, and is a Method for determining characteristics of vapor cloud explosion in a blockage space.
Disclosure of Invention
An object of the embodiments of the present invention is to provide an explosion overpressure assessment method and an apparatus thereof, so as to solve at least the problems of complicated calculation and long time consumption in the current explosion overpressure assessment.
In order to achieve the above object, in a first aspect of the present invention, there is provided an explosion overpressure evaluation method, the method including:
establishing a plurality of explosion overpressure curve relation graphs corresponding to the explosion gas cloud volume and the explosion source distance under different explosion source intensities; according to the intensity of the explosive source, matching an explosive overpressure curve relation graph corresponding to the intensity of the explosive source; and obtaining the explosion overpressure of the point location in the explosion overpressure curve relation diagram by a graph checking method according to the volume of the explosion gas cloud and the distance between the point location and the explosion source.
Optionally, the intensity of the explosive source is divided according to a multi-energy method.
Optionally, the volume of the explosive gas cloud is dependent on the volume of the combustible gas cloud VBurning deviceAnd occlusion zone volume VResistance deviceAnd (4) determining.
Optionally, the volume of the explosive gas cloud is the volume of the combustible gas cloud VBurning deviceAnd the volume V of the occlusion zoneResistance deviceTo a smaller value.
Optionally, the volume of said gas cloud VBurning deviceIs determined by the following steps:
if the mass of the combustible gas cloud is obtained, obtaining the volume V of the combustible gas cloud according to the relation between the mass and the densityBurning device；
Otherwise, obtaining the volume V of the combustible gas cloud through a graph checking method according to the type of the medium of the combustible gas cloud and the operation pressure of the deviceBurning device。
Optionally, the volume V of the gas cloud is obtained by a graph-finding methodBurning deviceThe method comprises the following steps:
matching a corresponding pressure-volume curve relation graph according to the type of the medium of the combustible gas cloud;
the pressure-volume plot includes a correspondence of the device operating pressure to the volume of the cloud of combustible gas;
obtaining the volume V of the combustible gas cloud by a graph checking method according to the operating pressure of the deviceBurning device。
Optionally, the occlusion zone volume VResistance deviceIs determined by the following steps:
determining a total volume of the device region;
determining the volume V of the occlusion area according to the total volume and the occlusion rateResistance device。
Optionally, the determining the total volume of the device region includes:
deriving a length and a width of the device region;
classifying the device heights in the device area, and calculating the ratio of each classification;
obtaining an average height according to the height and the proportion of each classification;
and obtaining the total volume of the device region according to the length, the width and the average height.
Optionally, the blocking rate is a discrete value.
Optionally, there is a corresponding relationship between the blocking rate and the intensity of the explosive source.
In a second aspect of the present invention, there is also provided an explosion overpressure assessment apparatus, the apparatus comprising: a memory and a processor;
the memory to store program instructions;
the processor is configured to invoke the program instructions stored in the memory to implement the aforementioned explosion overpressure assessment method.
Optionally, the memory is further configured to store the explosion overpressure curve map, where the explosion overpressure curve map is used to obtain the explosion overpressure of the point location in the explosion overpressure curve map by a mapping method according to the intensity of the explosion source, the volume of the explosion gas cloud, and the distance from the point location to the explosion source.
Optionally, the memory is further configured to store the pressure-volume curve map, the pressure-volume curve map including a corresponding relationship between the device operating pressure and the volume of the gas cloud, and is used to obtain the volume V of the gas cloud according to the device operating pressure by a charting methodBurning device。
Optionally, the apparatus further comprises:
the input device is used for inputting the condition of the chart; and the output device is used for outputting the result of the chart checking.
In a third aspect of the present invention, there is also provided a machine-readable storage medium having stored thereon instructions which, when run on a computer, cause the computer to perform the aforementioned explosion overpressure assessment method.
The technical scheme of the invention provides a rapid quantitative evaluation method and device for explosion overpressure, which can be rapidly mastered by general engineering technicians and is suitable for petrochemical devices, and the method and device can avoid a complex calculation process of explosion overpressure, improve analysis speed and avoid large errors caused by an empirical judgment method.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a flow chart of a method for explosive overpressure assessment provided by one embodiment of the present invention;
fig. 2 is a graph of an explosion overpressure curve for an explosive source intensity S-5 provided by an alternative embodiment of the present invention;
fig. 3 is a graph of the explosive overpressure curve for an explosive source intensity S-9 provided by an alternative embodiment of the present invention;
FIG. 4 is a graph of a pressure versus volume curve for 10 minutes of methane and ethane leak at 5D according to an alternative embodiment of the present invention;
FIG. 5 is a graph of pressure versus volume for propane and butane provided in accordance with an alternative embodiment of the present invention at 1.5F for a 10 minute leak;
FIG. 6 is a graph of pressure versus volume for 10 minutes of leakage of hydrogen and ethylene on different days, according to an alternative embodiment of the present invention;
fig. 7 is a schematic structural view of an explosion overpressure evaluating apparatus provided in accordance with an alternative embodiment of the present invention; and
fig. 8 is a flowchart of an implementation of a method for evaluating explosion overpressure according to an alternative embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the embodiments of the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, and bottom" is generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, or gravitational direction.
Fig. 1 is a flow chart of a method for evaluating explosion overpressure according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides an explosion overpressure evaluation method, including:
establishing a plurality of explosion overpressure curve relation graphs corresponding to the explosion gas cloud volume and the explosion source distance under different explosion source intensities;
according to the intensity of the explosive source, matching an explosive overpressure curve relation graph corresponding to the intensity of the explosive source;
and obtaining the explosion overpressure of the point location in the explosion overpressure curve relation diagram by a graph checking method according to the volume of the explosion gas cloud and the distance between the point location and the explosion source.
Therefore, the complex calculation process of explosion overpressure can be avoided, the analysis speed is improved, and large errors caused by an empirical judgment method are avoided.
Specifically, the explosion overpressure at a location is related to the following factors: the intensity of the explosive source, the volume of the explosive gas cloud and the distance between the position and the explosive source are complex, so that the general engineering technicians are difficult to master. In the method in this embodiment, the intensity of the explosive source is first determined, and an explosion overpressure curve relation diagram under the intensity of the explosive source is obtained. The curve contains the volume of the explosive gas cloud and the explosive overpressure corresponding to the distance from the explosive source. Through a graph checking method, explosion overpressure on point positions can be intuitively and accurately determined in the curve relation graph, complex calculation is avoided, and analysis speed is improved.
Further, the intensity of the explosive source is divided according to a multi-energy method.
The greater the intensity of the explosive source, the greater the explosive overpressure generated. The intensity of the explosive source is determined according to the material composition, the blocking degree of the device area, the restrained degree and the like, and the intensity grade S of the explosive source is 10 grades from low to high according to a multi-energy method, wherein the grade S of the intensity of the explosive source is S1-S10. And the explosion overpressure curve relation graph is divided according to the intensity of the explosion source, so that the explosion source not only meets the general specifications in the industry, but also improves the matching accuracy.
Fig. 2 is a graph of an explosion overpressure curve for an explosive source intensity S-5 provided by an alternative embodiment of the present invention; fig. 3 is an explosion overpressure curve diagram of an explosion source intensity S-9 according to an alternative embodiment of the present invention (only the explosion overpressure curve diagrams of the explosion source intensity S-5 and S-9 are shown above, in practice, multiple diagrams of the explosion source intensity S1-10 should be included for matching in the field according to the explosion source intensity). As shown in fig. 2 or fig. 3, an explosion overpressure coordinate point can be quickly determined by taking the volume of the explosion gas cloud as an abscissa and the distance from the explosion source as an ordinate. But the explosion overpressure value corresponding to the coordinate point needs to be further determined through a reference line. The reference lines are oblique lines marked 1-4 in the figures. Taking fig. 2, that is, the explosion intensity S is 5 as an example, when the determined explosion overpressure coordinate point is exactly on the reference line 1, that is, 5kPa is corresponded; if on the reference line 2, it corresponds to 10kPa, and so on. When the explosion overpressure coordinate point is not on the reference line, the estimation is carried out according to the upper and lower reference lines. By the method, the explosion overpressure value at a certain distance can be quickly obtained.
In one embodiment of the invention, the volume of the explosive gas cloud is dependent on the volume of the combustible gas cloud VBurning deviceAnd occlusion zone volume VResistance deviceAnd (4) determining. Further, the volume of the explosive gas cloud is the volume V of the combustible gas cloudBurning deviceAnd the volume V of the occlusion zoneResistance deviceTo a smaller value.
If the combustible gas cloud formed by the leaked materials is not filled in the whole blocking area, namely the volume of the combustible gas cloud is smaller than that of the blocking area, the volume of the combustible gas cloud in the explosion source is the volume of the steam cloud actually entering the area; if the volume of the flammable cloud is greater than the volume of the choke zone, then the volume of the flammable cloud within the explosive source is the volume of the choke zone. That is, the volume of the flammable gas cloud within the explosive source should be selected to be the lesser of the volume of the vapor cloud actually entering the region and the volume of the occlusion zone. In estimating the volume of the occlusion region, the total volume of the device region is used to subtract the volume occupied by the devices in that regionAnd (4) accumulating. Thus, the volume of the explosion gas cloud Vex is the volume of the combustible gas cloud VBurning deviceAnd occlusion zone volume VResistance deviceThe smaller of them. The formula for the volume of the explosive cloud Vex is: vex ═ Min (V)Burning device，VResistance device)。
Further, the volume V of the gas cloudBurning deviceIs determined by the following steps:
if the mass of the combustible gas cloud is obtained, obtaining the volume V of the combustible gas cloud according to the relation between the mass and the densityBurning device(ii) a Otherwise, obtaining the volume V of the combustible gas cloud through a graph checking method according to the type of the medium of the combustible gas cloud and the operation pressure of the deviceBurning device。
If the mass of the combustible gas cloud is obtained, the volume V of the combustible gas cloudBurning deviceCalculated by the following formula:
Through calculation, six representative media are obtained, and the volume of the combustible gas cloud under the common conditions is obtained. The volume of the gas cloud may be estimated with reference to the following scenario parameters:
typical media: methane, ethane, propane, butane; hydrogen gas; ethylene
Typical wind speed and atmospheric stability: 1.5m/s, F; 5m/s, D
Typical leak pore size: 50mm
Typical leakage time: for 10min
Typical operating temperatures are: 30 deg.C
Typical operating pressures are: 0.5MPa to 10MPa
Under the scene parameters, through simulation and calculation, combustible gas cloud volume estimation curves of methane, ethane, propane and butane under different operating pressures are obtained.
FIG. 4 is a graph of the pressure versus volume curve for 10 minutes of methane and ethane leakage at 5D (i.e., 5m/s wind speed, D atmospheric stability) according to an alternative embodiment of the present invention; FIG. 5 is a graph of pressure versus volume for propane and butane provided in accordance with an alternative embodiment of the present invention at a leak time of 10 minutes at 1.5F (i.e., 1.5m/s wind speed, F atmospheric stability); FIG. 6 is a graph of pressure versus volume for 10 minutes of leakage of hydrogen and ethylene on different days, according to an alternative embodiment of the present invention; the above includes six common leakage curves of combustible gas, and in an actual use scene, it is necessary to appropriately correct values obtained by a graph search method according to actual conditions on site.
Obtaining the volume V of the combustible gas cloud from the combustible gas cloud volume estimation curve by a graph checking methodBurning deviceThe method comprises the following steps:
matching a corresponding pressure-volume curve relation graph according to the type of the medium of the combustible gas cloud; due to the different characteristics of each medium, the graphs corresponding to the medium types in the above figures (fig. 4-6, more figures may be included in the actual scene) need to be selected to obtain accurate results.
The pressure-volume plot includes a correspondence of the device operating pressure to the volume of the cloud of combustible gas; obtaining the volume V of the combustible gas cloud by a graph checking method according to the operating pressure of the deviceBurning device. Namely: determining corresponding curve according to meteorological conditions in the field, and finding out the ordinate corresponding to the abscissa by a graph-finding method according to the curve corresponding to the operating pressure and the meteorological conditions, namely the combustible cloud volume VBurning device。
In one embodiment of the invention, the occlusion region volume VResistance deviceIs determined by the following steps:
determining a total volume of the device region; and determining the volume Vblock of the blocking area according to the total volume and the blocking rate.
Namely: the estimation method comprises two steps: in a first step, the total length, width, height and corresponding volume of the device region are determined. And secondly, determining the blocking rate of the device area, and further determining the volume of the blocking area.
Further, the determining a total volume of the device region includes:
deriving a length and a width of the device region; classifying the device heights in the device area, and calculating the ratio of each classification; obtaining an average height according to the height and the proportion of each classification; and obtaining the total volume of the device region according to the length, the width and the average height.
The calculation steps in this embodiment are as follows:
(1) occlusion region length L and width W
According to the measured length L and width W of the device boundary, different devices are separated by a distance less than 20m and can be used as a blocking area, and the separation is calculated to exceed 20 m.
(2) Occlusion region height H
H can be generally determined from the average height of the device region population. If the device region has multiple types of devices of different heights, H can be calculated with reference to the weighted average height:
a. for thin and high towers, the height can be ignored when determining the height, but towers with larger occupied area, such as reaction towers, and the like, need to be considered according to a certain occupied area proportion;
b. according to the height distribution condition of the device, firstly dividing the device into n height areas, then respectively estimating the proportion of the area occupied by each height area, and further determining the weighted average height, such as:
the occlusion zone is mainly composed of 3 height zones: a 40m tall zone having a footprint of about 20%, a 20m tall zone of about 60%, and a 10m tall zone of about 20%, then the weighted average height H of the device zones should be:
H＝40×20％+20×60％+10×20％＝22m。
thus, the total volume V of the device regionGeneral assembly＝L×W×H。
In one embodiment of the present invention, the blocking rate is a discrete value. The blocking rate and the intensity of the explosive source have a corresponding relation.
The blocking degree of the blocking area of the device is divided into 4 levels: severe occlusion, high occlusion, medium occlusion, and low occlusion.
(1) Severe clogging: the light in the middle of a severely blocked area is very dark and needs permanent illumination to work. The average blockage rate is 0.45, and the explosion intensity S is 9-10.
(2) High blocking: the illumination level is low and permanent illumination is required. The average blockage rate is 0.35, and the explosion intensity S is 7-8.
(3) Moderate obstruction: light penetration is good and does not require permanent illumination on a continuous basis. The average blockage rate is 0.25, and the explosion intensity S is 6-7.
(4) Low blocking: sunlight is often visible on the floor in the main aisle area, with a large space between the equipment. The average blockage rate is 0.15, and the explosion intensity S is 4-5.
(5) Blocked area with top plate: meaning that more than 80% of the congested area is blocked by the ceiling in the vertical direction. Each layer should be evaluated for clogging and the highest rate of clogging used in the analysis, while leakage from all process layers should be considered.
Calculating the volume of the blocking area according to the blocking rate br: vResistance device＝VGeneral assembly×(1-br)。
An embodiment of the present invention also provides an explosion overpressure evaluation apparatus, including: a memory and a processor;
the memory to store program instructions;
the processor is configured to invoke the program instructions stored in the memory to implement the aforementioned explosion overpressure assessment method. The processor may include, but is not limited to, a general purpose processor, a special purpose processor, a conventional processor, a plurality of microprocessors, a controller, a microcontroller, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) circuit, any other type of Integrated Circuit (IC), a state machine, and the like.
An embodiment of the present invention further provides the explosion overpressure evaluation apparatus, wherein the memory is further configured to store the explosion overpressure curve map, and the explosion overpressure curve map is used to obtain the explosion overpressure of the point location in the explosion overpressure curve map by a mapping method according to the intensity of the explosion source, the volume of the explosion gas cloud, and the distance of the point location from the explosion source.
The invention also provides an explosion overpressure evaluation deviceWherein the memory is further configured to store the pressure-volume curve map comprising a correspondence of the device operating pressure to the volume of the cloud of combustible gas, for obtaining the volume of the cloud of combustible gas VV from the device operating pressure by a charting methodBurning device。
The functions and methods of use of the stored explosion overpressure curve and pressure-volume curve are as described above and will not be repeated here.
Fig. 7 is a schematic structural diagram of an explosion overpressure evaluating apparatus according to an alternative embodiment of the present invention, as shown in fig. 7: the device comprises the explosion overpressure evaluation device, and also comprises: the input device is used for inputting the condition of the chart; and the output device is used for outputting the result of the chart checking.
The input device may be a keyboard, a mouse, a touch panel, or other input device, and the output device may be a display, a printer, a mobile panel, or other device capable of displaying the result. In view of the field portability, the input device and the output device can be integrated in an intelligent terminal having a processor and a memory, and capable of executing the explosion overpressure evaluation method described above.
Fig. 8 is a flowchart of an embodiment of an explosion overpressure evaluation method according to an alternative embodiment of the present invention, and as shown in fig. 8, when the volume of the flammable gas cloud and the distance between the building and the explosion source are determined, the value of the explosion overpressure generated by the petrochemical device on a certain building can be determined directly according to the flowchart of fig. 8, and the specific steps are as follows:
(1) calculating the volume of the gas cloud according to the explosive substances and meteorological conditions;
(2) calculating the volume of the blocking area according to the volume of the device area and the blocking rate of the device area;
(3) selecting the smaller of the gas cloud volume and the blocking area volume to determine as the volume of the explosive gas cloud;
(4) judging the intensity and the distance between the explosion source and the explosion source;
(5) and determining explosion overpressure according to the volume of the explosion cloud, the intensity of the explosion source and the distance from the explosion source.
In one embodiment of the present invention, there is also provided a machine-readable storage medium having stored thereon instructions which, when run on a computer, cause the computer to perform the aforementioned explosion overpressure assessment method.
Through the technical scheme of the invention, field personnel can quickly calculate the explosion overpressure at each point according to the field conditions, so that the complex calculation process of the explosion overpressure can be avoided, the analysis speed is improved, and larger errors caused by an empirical judgment method are avoided.
While the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications are within the scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for the various possible combinations.
Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as disclosed in the embodiments of the present invention as long as it does not depart from the spirit of the embodiments of the present invention.
Claims (15)
1. A method of explosive overpressure assessment, said method comprising:
establishing a plurality of explosion overpressure curve relation graphs corresponding to the explosion gas cloud volume and the explosion source distance under different explosion source intensities;
according to the intensity of the explosive source, matching an explosive overpressure curve relation graph corresponding to the intensity of the explosive source;
and obtaining the explosion overpressure of the point location in the explosion overpressure curve relation diagram by a graph checking method according to the volume of the explosion gas cloud and the distance between the point location and the explosion source.
2. The method of claim 1, wherein the explosive source intensity is divided according to a multi-energy method.
3. The method of claim 2, wherein the explosive cloud volume is based on a combustible gas cloud volume VBurning deviceAnd occlusion zone volume VResistance deviceAnd (4) determining.
4. The method of claim 3, wherein the explosive gas cloud volume is the combustible gas cloud volume VBurning deviceAnd the volume V of the occlusion zoneResistance deviceTo a smaller value.
5. The method of claim 3, wherein the volume V of the gas cloudBurning deviceIs determined by the following steps:
if the mass of the combustible gas cloud is obtained, obtaining the volume V of the combustible gas cloud according to the relation between the mass and the densityBurning device；
Otherwise, obtaining the volume V of the combustible gas cloud through a graph checking method according to the type of the medium of the combustible gas cloud and the operation pressure of the deviceBurning device。
6. The method of claim 5, wherein the cloud of combustible gas is derived by a graph-look-up methodProduct VBurning deviceThe method comprises the following steps:
matching a corresponding pressure-volume curve relation graph according to the type of the medium of the combustible gas cloud;
the pressure-volume plot includes a correspondence of the device operating pressure to the volume of the cloud of combustible gas;
obtaining the volume V of the combustible gas cloud by a graph checking method according to the operating pressure of the deviceBurning device。
7. The method of claim 3, wherein the occlusion region volume VResistance deviceIs determined by the following steps:
determining a total volume of the device region;
determining the occlusion zone volume V from the total volume and the occlusion rate of the device zoneResistance device。
8. The method of claim 7, wherein the determining the total volume of the device region comprises:
deriving a length and a width of the device region;
classifying the device heights in the device area, and calculating the ratio of each classification;
obtaining an average height according to the height and the proportion of each classification;
and obtaining the total volume of the device region according to the length, the width and the average height.
9. The method of claim 7, wherein the blocking rate is a discrete value.
10. The method of claim 9, wherein the blockage rate corresponds to the explosive source intensity.
11. An explosive overpressure assessment apparatus, said apparatus comprising: a memory and a processor;
the memory to store program instructions;
the processor for invoking the program instructions stored in the memory to implement the explosion overpressure assessment method of any one of claims 1 to 10.
12. The apparatus of claim 11, wherein the memory is further configured to store the explosion overpressure curve map;
and the explosion overpressure curve relation graph is used for obtaining the explosion overpressure of the point position in the explosion overpressure curve relation graph through a graph checking method according to the intensity of an explosion source, the volume of the explosion gas cloud and the distance between the point position and the explosion source.
13. The apparatus of claim 12, wherein the memory is further configured to store the pressure-volume curve map;
the pressure-volume curve relation graph comprises the corresponding relation between the device operation pressure and the volume of the combustible gas cloud, and is used for obtaining the volume V of the combustible gas cloud through a graph looking method according to the device operation pressureBurning device。
14. The apparatus of any one of claims 11 to 13, further comprising:
the input device is used for inputting the condition of the chart; and
and the output device is used for outputting the result of the chart checking.
15. A machine-readable storage medium having stored thereon instructions which, when run on a computer, cause the computer to execute the explosion overpressure assessment method of any one of claims 1 to 10.
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