CN108334984A - Liquid leakage accident simulation deduction method based on GIS-Geographic Information System and device - Google Patents
Liquid leakage accident simulation deduction method based on GIS-Geographic Information System and device Download PDFInfo
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Abstract
The liquid leakage accident based on GIS-Geographic Information System that the invention discloses a kind of simulating deduction method and device, method include：The environmental pressure of liquid level at acquisition liquid line breach area, breach, the fluid pressure in the density and liquid line of leakage liquid and liquid line, and liquid leakage coefficient is determined according to liquid line breach shape；Calculate leakage liquid mass flow；Obtain liquid leakage duration；According to leakage liquid mass flow and liquid leakage duration, the quality of leakage liquid is calculated；According to the quality and liquid leakage duration of fluid pressure, leakage liquid in liquid line, the leakage radius of liquid is calculated, and shows the coverage of this liquid leakage in the three-dimensional map of GIS-Geographic Information System according to the leakage radius of liquid.Device includes：First acquisition module, the first computing module, the second acquisition module, the second computing module, third computing module, first deduce module.The present invention provides more intuitive reference informations.
Description
Technical field
The present invention relates to information technology fields, more particularly to the simulation of the liquid leakage accident based on GIS-Geographic Information System is deduced
Method and device.
Background technology
The transport of oil is divided into land transportation and marine transportation.Land transportation mainly uses pipeline transportation, is advantageous in that
Timeliness is good, can not be limited by day and night and weather, but flexibility is poor.Marine transportation mainly uses mammoth tanker etc.
Means of transportation is advantageous in that ocean freight is low, freight volume is big, but the time is longer.
In the transportational process using pipeline, the hidden danger caused by pipeline defect, each manufacturer all use in order to prevent
Various emergency response systems.The emergency response system used in petroleum industry at present can provide image scene,
The specifying informations such as live sound, location of accident.Above-mentioned emergency response system uses GIS-Geographic Information System (Geographic
Information System, referred to as GIS) technology and space technology, so as to store, manage, application and analysis it is geographical
Data and cartographic information, and can be graphical by spatial data, information-based.At the same time it can also utilize Audiotechnica and communication
Technology helps command scheduling related resource.Specifically, emergency response system can using geographical information technology localized accident
Point, and inquire surrounding enviroment and emergency service；Emergency response system can utilize the communication technology, be established between each relevant department
It writes to each other, to reach resource unified allocation of resources.
However, existing major part emergency response system can only check the place with the relevant information of accident and the scene of the accident
Progress is set, the simulation that can not carry out the loss of the coverage and accident of accident is deduced.It is carried thus, be difficult to manager
For accident decision-making foundation, to control accident impact range and the extent of injury.
Invention content
In order to solve the above technical problem, the present invention provides a kind of liquid leakage accident mould based on GIS-Geographic Information System
Quasi- deduction method and device avoid existing most of emergency response system that from can only checking and the relevant information of accident and accident
The problem of disposition progress at scene, while the simulation for overcoming the loss of the coverage and accident that can not carry out accident is deduced
Defect.
According to an aspect of the present invention, the present invention provides a kind of liquid leakage accident mould based on GIS-Geographic Information System
Quasi- deduction method, includes the following steps：
Step S1：The density and liquid line of liquid level, leakage liquid at acquisition liquid line breach area, breach
In fluid pressure and liquid line environmental pressure, and liquid leakage coefficient, institute are determined according to liquid line breach shape
The value range for stating liquid leakage coefficient is 0 to 1；
Step S2：According to liquid level, the density of leakage liquid, the liquid at the liquid line breach area, breach
The environmental pressure and liquid leakage coefficient of fluid pressure and liquid line in pipeline, calculate leakage liquid mass flow；
Step S3：Obtain liquid leakage duration；
Step S4：According to the leakage liquid mass flow and liquid leakage duration, the quality of leakage liquid is calculated；
Step S5：According to the quality and liquid leakage duration of fluid pressure, leakage liquid in the liquid line, calculate
The leakage radius of the liquid, and according to the leakage radius of the liquid shown in the three-dimensional map of GIS-Geographic Information System with
Time deduces the variation of liquid leakage range.
In one embodiment of the invention, when the liquid line breach shape is round, the liquid leakage system
Number is 1.00；When the liquid line breach shape is triangle, the liquid leakage coefficient is 0.95；When the liquid line
When line breach shape is rectangle, the liquid leakage coefficient is 0.90.
In one embodiment of the invention, in step s 2, the leakage liquid is calculated using following Bernoulli equation
Mass flow：In formula, A is the liquid line breach area, h is described splits
Liquid level, p at mouthful are fluid pressure, C in the liquid linedFor the liquid leakage coefficient, p0For the liquid line
Environmental pressure, the ρ of line are the density of the liquid, qmFor the leakage liquid mass flow, g is acceleration of gravity.
In one embodiment of the invention, in step s 4, the quality of the leakage liquid is calculated using following formula：M=
qmT, in formula, qmFor the leakage liquid mass flow, the quality that m is the leakage liquid, t is the liquid leakage duration.
In one embodiment of the invention, in step s 5, the leakage radius of the liquid is calculated using following formula：In formula, r be leakage radius, the m of the liquid be the quality of the leakage liquid, g is acceleration of gravity, p
It is the liquid leakage duration for fluid pressure, the t in the liquid line.
In one embodiment of the invention, further comprising the steps of：Step S6：According to the leakage radiuscope of the liquid
The concentration distribution of the vaporous cloud for the generation that evaporates after leaking is calculated, and according to the concentration of the vaporous cloud of the generation that evaporates point
Cloth is shown in the three-dimensional map of GIS-Geographic Information System as the time deduces the change for the vaporous cloud concentration that liquid leakage volatilization generates
Change.
In one embodiment of the invention, in step s 6, the vaporous cloud for the generation that evaporates after leaking is calculated using following formula
Concentration distribution：
In formula, QevapIt is atmospheric stability coefficient, p for quality evaporation rate, a and nVFor liquid surface vapour pressure, T0For environment temperature, M
Be gas constant for the molal weight of leak materials, R, u is wind speed on ground at 10 meters, c (x, y, z) be given place (x,
Y, z) the concentration of vaporous cloud of the generation that evaporates, x be lower wind direction distance, y be beam wind to the distance that distance, z are from the ground,
σyFor y Directional Extensions parameter, σzFor z Directional Extension parameters.
According to another aspect of the present invention, the liquid leakage accident based on GIS-Geographic Information System that the present invention provides a kind of
Device is deduced in simulation, including：
First acquisition module, for obtaining liquid line breach area, the density of the liquid level at breach, leakage liquid
With the environmental pressure of fluid pressure and liquid line in liquid line, and determine that liquid is let out according to liquid line breach shape
The value range of the coefficient of leakage, the liquid leakage coefficient is 0 to 1；
First computing module, for according to liquid level, the leakage liquid at the liquid line breach area, breach
Density and liquid line surrounding enviroment pressure and liquid leakage coefficient, calculate leakage liquid mass flow；
Second acquisition module, for obtaining the liquid leakage duration；
Second computing module, for according to the leakage liquid mass flow and liquid leakage duration, calculating leakage
The quality of liquid；
Third computing module is used for the quality according to the leakage liquid and the liquid leakage duration, calculates the liquid
The leakage radius of body；
First deduces module, for being shown in the three-dimensional map of GIS-Geographic Information System according to the leakage radius of the liquid
As the time deduces the variation of liquid leakage range.
In one embodiment of the invention, the liquid leakage accident simulation based on GIS-Geographic Information System is deduced device and is also wrapped
It includes：Second deduce module, for according to the leakage radius of the liquid calculate leak after evaporate generation vaporous cloud it is dense
Degree distribution, and shown in the three-dimensional map of GIS-Geographic Information System according to the concentration distribution of the vaporous cloud of the generation that evaporates
As the time deduces the variation of the concentration for the vaporous cloud that liquid leakage volatilization generates.
In one embodiment of the invention, when the liquid line breach shape is round, the liquid leakage system
Number is 1.00；When the liquid line breach shape is triangle, the liquid leakage coefficient is 0.95；When the liquid line
When line breach shape is rectangle, the liquid leakage coefficient is 0.90.
Compared with prior art, one or more of present invention embodiment can have the following advantages that or advantageous effect：
1, the liquid leakage accident based on GIS-Geographic Information System of the embodiment of the present invention simulates deduction method, can be according to institute
The Mass Calculation for stating leakage liquid goes out liquid leakage radius, and is combined with GIS-Geographic Information System, and result of calculation is carried out in map
Displaying and image capturing range prompt overcome existing to provide more effective, visual, intuitive reference information to cammander
Leakage accident processing can only check that the disposition with the relevant information of accident and the scene of the accident is in progress scarce in emergency response technology
It falls into.
2, device is deduced in the liquid leakage accident simulation based on GIS-Geographic Information System of the embodiment of the present invention, can be according to institute
The concentration distribution for stating the vaporous cloud for the generation that evaporates shows that relevant range liquid is let out in the three-dimensional map of GIS-Geographic Information System
The hazard rating of leakage, and can be according to the concentration distribution of the vaporous cloud of the generation that evaporates the three of GIS-Geographic Information System
Tie up the variation of the concentration for the vaporous cloud that displaying is generated with time deduction liquid leakage volatilization in map.To be more advantageous to commander
Control of the person to leakage accident range and degree of danger reduces the economic asset loss of accident.
Other features and advantages of the present invention will be illustrated in the following description, and partly becomes from specification
It is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages can be by wanting in specification, right
Specifically noted structure is sought in book and attached drawing to realize and obtain.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings：
Fig. 1 shows the method flow diagram of the embodiment of the present invention one；
Fig. 2 shows the method flow diagrams in the embodiment of the present invention two；
Fig. 3 shows the module diagram of the device in the embodiment of the present invention one；
Fig. 4 shows the module diagram of the device in the embodiment of the present invention two.
Specific implementation mode
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to be applied to the present invention whereby
Technological means solves technical problem, and the realization process for reaching technique effect can fully understand and implement.It needs to illustrate
As long as not constituting conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other,
It is formed by technical solution within protection scope of the present invention.
In following embodiment, the first, second equal wording does not have limited meaning simultaneously, but merely for by one
Purpose that a inscape is distinguished with other inscapes uses.In addition, unless separately having specific finger on the contrary in context
Show, otherwise singular references include that plural number is stated.In addition, include or with etc. wording refer to feature recorded in specification or
The presence of inscape, rather than the additional possibility of other more than one features or inscape is excluded in advance.
Embodiment one
Shown in Figure 1, Fig. 1 is that the liquid leakage accident simulation based on GIS-Geographic Information System of the embodiment of the present invention one pushes away
Drill the flow diagram of method.As shown in Figure 1, the liquid leakage accident simulation deduction method based on GIS-Geographic Information System includes：
Step S1：The density and liquid line of liquid level, leakage liquid at acquisition liquid line breach area, breach
In fluid pressure and liquid line environmental pressure, and liquid leakage coefficient, institute are determined according to liquid line breach shape
The value range for stating liquid leakage coefficient is 0 to 1；
Step S2：According to liquid level, the density of leakage liquid, the liquid at the liquid line breach area, breach
The environmental pressure and liquid leakage coefficient of fluid pressure and liquid line in pipeline, calculate leakage liquid mass flow；
Step S3：Obtain liquid leakage duration；
Step S4：According to the leakage liquid mass flow and liquid leakage duration, the quality of leakage liquid is calculated；
Step S5：According to the quality and liquid leakage duration of fluid pressure, leakage liquid in the liquid line, calculate
The leakage radius of the liquid, and this is shown in the three-dimensional map of GIS-Geographic Information System according to the leakage radius of the liquid
The coverage of liquid leakage.
In step s3, the method for acquisition liquid leakage duration is：The side of record liquid leakage initial time can be passed through
Method calculates liquid leakage duration；Or can be by directly detecting the liquid leakage time method.Those skilled in the art
It should be known that the above embodiments are two specific embodiments.Other obtaining means, as long as related ginseng can be obtained
Several means, then can be used.
In embodiment one, according to liquid level, the leakage fluid at the liquid line breach area, the breach
The density of body, the liquid leakage coefficient, the environmental pressure calculate leakage liquid mass flow using bernoulli equation
Method be：Leakage liquid mass flow is calculated according to following calculation formula (1), the calculating formula (1) is：
In calculating formula (1), A is pipeline breach area (the unit m2), h be the breach at liquid level
(unit m), P are overpressure (unit Pa), the C of the leakage liquiddFor the liquid leakage coefficient, p0For the ring
Border pressure (unit Pa), ρ are leakage liquid density (unit kg/m3)、qmFor the leakage liquid mass flow, (unit is
kg/s)。
In embodiment one, when the pipeline breach shape is round, CdIt is 1.00；When the pipeline breach shape is
When triangle, CdIt is 0.95；When the pipeline breach shape is rectangle, CdIt is 0.90.
In embodiment one, according to described according to the leakage liquid mass flow and the liquid leakage duration, meter
Calculate leakage liquid quality method be：Leakage liquid quality (unit kg), the calculating formula are calculated according to calculating formula (2)
(2) it is：
M=qmt (2)
In calculating formula (2), m is the quality (unit kg) of the leakage liquid, t is liquid leakage duration (unit s).
It is described that liquid is calculated according to the leakage liquid quality m and the liquid leakage duration t in embodiment one
The method of leakage radius r is：Liquid leakage radius r is calculated according to calculating formula (3).
The calculating formula (3) is
In calculating formula (3), r be the liquid leakage radius (unit m), m be the leakage liquid quality (unit
For kg), g be acceleration of gravity (unit 9.8m/s2), P be fluid pressure (unit pa) in pipeline, t is the liquid
Leak duration (unit s).
After calculating liquid leakage radius r, according to the leakage radius r of the liquid GIS-Geographic Information System three-dimensional
It is shown in map as the time deduces the variation of liquid leakage range, and determines the coverage of liquid leakage with this.
The liquid leakage accident based on GIS-Geographic Information System of the embodiment of the present invention one simulates deduction method, can be according to institute
The Mass Calculation for stating leakage liquid goes out liquid leakage radius, and is combined with GIS-Geographic Information System, and result of calculation is carried out in map
Displaying and image capturing range prompt overcome existing to provide more effective, visual, intuitive reference information to cammander
Leakage accident processing can only check that the disposition with the relevant information of accident and the scene of the accident is in progress scarce in emergency response technology
It falls into.
In order to realize that above-mentioned technique effect, the embodiment of the present invention one additionally provide a kind of liquid based on GIS-Geographic Information System
Device is deduced in leakage accident simulation, as shown in figure 3, device is deduced in the liquid leakage accident simulation based on GIS-Geographic Information System
Including：
First acquisition module 11, for obtaining liquid line breach area, the liquid level at breach, leakage liquid it is close
The environmental pressure of fluid pressure and liquid line in degree and liquid line, and liquid is determined according to liquid line breach shape
The value range of leadage coefficient, the liquid leakage coefficient is 0 to 1；
First computing module 12, for according to liquid level, the leakage liquid at the liquid line breach area, breach
Density and liquid line surrounding enviroment pressure and liquid leakage coefficient, calculate leakage liquid mass flow；
Second acquisition module 13, for obtaining the liquid leakage duration；
Second computing module 14, for according to the leakage liquid mass flow and liquid leakage duration, calculating and letting out
The quality of leakage body；
Third computing module 15, for according to the leakage liquid quality and the liquid leakage duration, described in calculating
The leakage radius of liquid；
First deduces module 16, for being opened up in the three-dimensional map of GIS-Geographic Information System according to the leakage radius of the liquid
Show as the time deduces the variation of liquid leakage range.
The simulation based on liquid leakage accident of embodiment shown in Fig. 3 is deduced in device, the implementation method of modules
The step S1 of the simulation deduction method based on liquid leakage accident of embodiment illustrated in fig. 1 one can be referred to step S5, therefore
The repetitive description thereof will be omitted herein.
Device is deduced in the according to embodiments of the present invention one liquid leakage accident simulation based on GIS-Geographic Information System, due to energy
It is enough that liquid leakage radius is calculated according to the liquid leakage gauge, and the liquid leakage radius and its influence are shown in map
Region cue provides more effective, visual, intuitive reference information to cammander, overcomes in existing emergency response technology
Leakage accident processing can only check the defect of the disposition progress with the relevant information of accident and the scene of the accident.Be conducive to leak thing
Therefore the control of range and degree of danger, reduce the economic asset loss of accident.
Embodiment two
Shown in Figure 2, Fig. 2 is that the liquid leakage accident simulation based on GIS-Geographic Information System of the embodiment of the present invention two pushes away
Drill the flow diagram of method.As shown in Fig. 2, the liquid leakage accident simulation deduction method based on GIS-Geographic Information System includes：
Step S1：The density and liquid line of liquid level, leakage liquid at acquisition liquid line breach area, breach
In fluid pressure and liquid line environmental pressure, and liquid leakage coefficient, institute are determined according to liquid line breach shape
The value range for stating liquid leakage coefficient is 0 to 1；
Step S2：According to liquid level, the density of leakage liquid, the liquid at the liquid line breach area, breach
The environmental pressure and liquid leakage coefficient of fluid pressure and liquid line in pipeline, calculate leakage liquid mass flow；
Step S3：Obtain liquid leakage duration；
Step S4：According to the leakage liquid mass flow and liquid leakage duration, the quality of leakage liquid is calculated；
Step S5：According to the quality and liquid leakage duration of fluid pressure, leakage liquid in the liquid line, calculate
The leakage radius of the liquid, and this is shown in the three-dimensional map of GIS-Geographic Information System according to the leakage radius of the liquid
The coverage of liquid leakage；
Step S6：The concentration point of the vaporous cloud for the generation that evaporates after leaking is calculated according to the leakage radius of the liquid
Cloth, and shown in the three-dimensional map of GIS-Geographic Information System according to the concentration distribution of the vaporous cloud of the generation that evaporates with
Time deduces the variation of the concentration for the vaporous cloud that liquid leakage volatilization generates.Meanwhile the steam generated according to aforesaid liquid volatilization
The concentration distribution of cloud shows the hazard rating of relevant range liquid leakage in the three-dimensional map of GIS-Geographic Information System.
Compared with the liquid leakage accident shown in FIG. 1 based on GIS-Geographic Information System simulates the embodiment of deduction method, Fig. 2
Shown in GIS-Geographic Information System liquid leakage accident simulate deduction method embodiment two increase step S6.That is, in Fig. 2
Step S1 to step S6 it is similar to step S5 to the step S1 in Fig. 1, therefore for convenience of description, omit be directed to step herein
The explanation of S1 to step S5.
In step s 6, the concentration of the vaporous cloud for the generation that evaporates after leaking is calculated according to the leakage radius of the liquid
It is distributed and determines that damaging range method is：The vaporous cloud of the generation that evaporates after leakage is calculated according to calculating formula (4) and (5)
Concentration distribution, make negligible risk, moderate harm, extremely endanger concentration isopleth, three kinds of different brackets may finally be obtained
The image capturing range of leakage hazard.
The calculating formula (4) is
The calculating formula (5) is
Wherein QevapIt is atmospheric stability coefficient, p for quality evaporation rate, a and nVFor liquid surface vapour pressure, T0For ring
Border temperature, M are the molal weight of leak materials, R is gas constant, u be wind speed, c (x, y, z) on ground at 10 meters is given
The concentration of the vaporous cloud of the generation that evaporates in place (x, y, z), x are lower wind direction distance, y be beam wind to distance, z be liftoff
Distance, σyFor y Directional Extensions parameter, σzFor z Directional Extension parameters.
The calculating of atmospheric stability coefficient a and n are referring to table one and table two, σyAnd σzCalculating referring to table three.
One Pasquill stability rank of table
Note：A- is extremely unstable；B- is unstable；C- is weak unstable；D- is neutral；E- weak steadies；F- stablizes.
Two atmospheric stability coefficient of table
| Stable range | n | a |
| Unstable (A, B) | 0.2 | 3.846×10-3 |
| Neutral (D) | 0.25 | 4.685×10-3 |
| Stablize (E, F) | 0.3 | 5.285×10-3 |
Three Briggs diffusion coefficient of table
| Stability | σy(m) | σz(m) |
| A | 0.22x(1+0.001x)-1/2 | 0.20x |
| B | 0.16x(1+0.0001x)-1/2 | 0.12x |
| C | 0.11x(1+0.0001x)-1/2 | 0.08x(1+0.0002x)-1/2 |
| D | 0.08x(1+0.0001x)-1/2 | 0.06x(1+0.0015x)-1/2 |
| E | 0.06x(1+0.0001x)-1/2 | 0.03x(1+0.0003x)-1 |
| F | 0.04x(1+0.0001x)-1/2 | 0.016x(1+0.0003x)-1 |
In embodiment two, the dense of the vaporous cloud for the generation that evaporates after leaking is calculated according to the leakage radius of the liquid
Degree distribution, and shown in the three-dimensional map of GIS-Geographic Information System according to the concentration distribution of the vaporous cloud of the generation that evaporates
The hazard rating of relevant range liquid leakage.
Device is deduced in the according to embodiments of the present invention two liquid leakage accident simulation based on GIS-Geographic Information System, due to energy
The concentration distribution of the vaporous cloud of enough generations that evaporates according to shows correlation zone in the three-dimensional map of GIS-Geographic Information System
The hazard rating of domain liquid leakage.And it can be according to the concentration distribution of the vaporous cloud of the generation that evaporates in geography information
The variation of the concentration for the vaporous cloud that displaying is generated with time deduction liquid leakage volatilization in the three-dimensional map of system.To more have
Control conducive to cammander to leakage accident range and degree of danger reduces the economic asset loss of accident.
Fig. 4 is that the module of device is deduced in the liquid leakage accident simulation based on GIS-Geographic Information System of the embodiment of the present invention two
Schematic diagram.As shown in figure 4, the liquid leakage accident simulation deduction device based on GIS-Geographic Information System includes：
First acquisition module 21, for obtaining liquid line breach area, the liquid level at breach, leakage liquid it is close
The environmental pressure of fluid pressure and liquid line in degree and liquid line, and liquid is determined according to liquid line breach shape
The value range of leadage coefficient, the liquid leakage coefficient is 0 to 1.
First computing module 22, for according to liquid level, the leakage liquid at the liquid line breach area, breach
Density and liquid line surrounding enviroment pressure and liquid leakage coefficient, calculate leakage liquid mass flow.
Second acquisition module 23, for obtaining the liquid leakage duration.
Second computing module 24, for according to the leakage liquid mass flow and liquid leakage duration, calculating and letting out
The quality of leakage body.
Third computing module 25, for according to the leakage liquid quality and the liquid leakage duration, described in calculating
The leakage radius of liquid.
First deduces module 26, for being opened up in the three-dimensional map of GIS-Geographic Information System according to the leakage radius of the liquid
Show as the time deduces the variation of liquid leakage range.
Second deduces module 27, for the steam according to the generation that evaporates after the calculating leakage of the leakage radius of the liquid
The concentration distribution of cloud, and according to the concentration distribution of the vaporous cloud of the generation that evaporates GIS-Geographic Information System three-dimensional map
The variation of the concentration for the vaporous cloud that liquid leakage volatilization generates is deduced in middle displaying with the time.
The embodiment that device is deduced in the liquid leakage accident simulation based on GIS-Geographic Information System as shown in figure 3 is compared, Fig. 4
Shown in based on liquid leakage accident simulation deduce device embodiment two increase the second deduction module 27.
The embodiment one that device is deduced in the liquid leakage accident simulation based on GIS-Geographic Information System as shown in figure 3 is compared,
The embodiment two that device is deduced in simulation shown in Fig. 4 based on liquid leakage accident increases the second deduction module 27.That is, Fig. 4
In the first acquisition module 21, the first computing module 22, the second acquisition module 23, the second computing module 24, third computing module
25, first deduce module 26 respectively in Fig. 3 the first acquisition module 11, the first computing module 12, the second acquisition module 13, the
Two computing modules 14, the deduction of third computing module 15, first module 16 are similar, therefore for convenience of description, omit be directed to herein
First acquisition module 21, the first computing module 22, the second acquisition module 23, the second computing module 24, third computing module 25,
One deduces the explanation of module 26.
Liquid leakage accident simulation shown in Fig. 4 based on GIS-Geographic Information System is deduced in the embodiment two of device, and second
The liquid leakage accident mould based on GIS-Geographic Information System of embodiment illustrated in fig. 2 two can be referred to by deducing the implementation method of module 27
The step S6 of quasi- deduction method, therefore repeated explanation is omitted herein.
Device is deduced in the according to embodiments of the present invention two liquid leakage accident simulation based on GIS-Geographic Information System, due to energy
The concentration distribution of the vaporous cloud of enough generations that evaporates according to shows correlation zone in the three-dimensional map of GIS-Geographic Information System
The hazard rating of domain liquid leakage.And it can be according to the concentration distribution of the vaporous cloud of the generation that evaporates in geography information
The variation of the concentration for the vaporous cloud that displaying is generated with time deduction liquid leakage volatilization in the three-dimensional map of system.To more have
Control conducive to cammander to leakage accident range and degree of danger reduces the economic asset loss of accident.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer read/write memory medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or light
The various media that can store program code such as disk.
Those skilled in the art should be understood that each module of the above invention or each step can use general calculating
Device realizes that they can be concentrated on a single computing device, or be distributed in network constituted by multiple computing devices
On, optionally, they can be realized with the program code that computing device can perform, it is thus possible to be stored in storage
It is performed by computing device in device, either they are fabricated to each integrated circuit modules or will be more in them
A module or step are fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and
Software combines.
While it is disclosed that embodiment content as above but described only to facilitate understanding the present invention and adopting
Embodiment is not limited to the present invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But protection scope of the present invention still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of liquid leakage accident based on GIS-Geographic Information System simulates deduction method, which is characterized in that include the following steps：
Step S1：In the density and liquid line that obtain liquid line breach area, the liquid level at breach, leakage liquid
The environmental pressure of fluid pressure and liquid line, and liquid leakage coefficient, the liquid are determined according to liquid line breach shape
The value range of body leadage coefficient is 0 to 1；
Step S2：According to liquid level, the density of leakage liquid, the liquid line at the liquid line breach area, breach
In fluid pressure and liquid line environmental pressure and liquid leakage coefficient, calculate leakage liquid mass flow；
Step S3：Obtain liquid leakage duration；
Step S4：According to the leakage liquid mass flow and liquid leakage duration, the quality of leakage liquid is calculated；
Step S5：According to the quality and liquid leakage duration of fluid pressure, leakage liquid in the liquid line, described in calculating
The leakage radius of liquid, and shown with the time in the three-dimensional map of GIS-Geographic Information System according to the leakage radius of the liquid
Deduce the variation of liquid leakage range.
2. the liquid leakage accident according to claim 1 based on GIS-Geographic Information System simulates deduction method, feature exists
In：
When the liquid line breach shape is round, the liquid leakage coefficient is 1.00；
When the liquid line breach shape is triangle, the liquid leakage coefficient is 0.95；
When the liquid line breach shape is rectangle, the liquid leakage coefficient is 0.90.
3. the liquid leakage accident according to claim 1 based on GIS-Geographic Information System simulates deduction method, feature exists
In in step s 2, following Bernoulli equation being utilized to calculate the leakage liquid mass flow：
In formula, A is the liquid line breach area, h be liquid level, p at the breach is in the liquid line
Fluid pressure, CdFor the liquid leakage coefficient, p0Environmental pressure, ρ for the liquid line are the density of the liquid, qm
For the leakage liquid mass flow, g is acceleration of gravity.
4. the liquid leakage accident according to claim 1 based on GIS-Geographic Information System simulates deduction method, feature exists
In in step s 4, the quality of the leakage liquid being calculated using following formula：
M=qmT,
In formula, qmFor the leakage liquid mass flow, the quality that m is the leakage liquid, t is the liquid leakage duration.
5. the liquid leakage accident according to claim 1 based on GIS-Geographic Information System simulates deduction method, feature exists
In in step s 5, the leakage radius of the liquid being calculated using following formula：
In formula, r be leakage radius, the m of the liquid be the quality of the leakage liquid, g is acceleration of gravity, p is the liquid
Fluid pressure, t in fluid line are the liquid leakage duration.
6. the liquid leakage accident according to claim 1 based on GIS-Geographic Information System simulates deduction method, feature exists
In further comprising the steps of：
Step S6：The concentration distribution of the vaporous cloud for the generation that evaporates after leaking is calculated according to the leakage radius of the liquid, and
It is shown with the time in the three-dimensional map of GIS-Geographic Information System according to the concentration distribution of the vaporous cloud of the generation that evaporates
Deduce the variation of the concentration for the vaporous cloud that liquid leakage volatilization generates.
7. the liquid leakage accident according to claim 6 based on GIS-Geographic Information System simulates deduction method, feature exists
In, in step s 6, the concentration distribution of the vaporous cloud for the generation that evaporates after utilizing following formula calculating to leak：
In formula, QevapIt is atmospheric stability coefficient, p for quality evaporation rate, a and nVFor liquid surface vapour pressure, T0For environment temperature
Degree, M are the molal weight of leak materials, R is gas constant, u is wind speed on ground 10 meters at, c (x, y, z) is to give place
The concentration of the vaporous cloud of the generation that evaporates of (x, y, z), x are lower wind direction distance, y be beam wind to distance, z be from the ground away from
From, σyFor y Directional Extensions parameter, σzFor z Directional Extension parameters.
8. device is deduced in a kind of liquid leakage accident simulation based on GIS-Geographic Information System, which is characterized in that including：
First acquisition module, for obtaining liquid line breach area, the density and liquid of the liquid level at breach, leakage liquid
The environmental pressure of fluid pressure and liquid line in fluid line, and liquid leakage system is determined according to liquid line breach shape
The value range of number, the liquid leakage coefficient is 0 to 1；
First computing module, for the density according to liquid level, leakage liquid at the liquid line breach area, breach
With liquid line surrounding enviroment pressure and liquid leakage coefficient, leakage liquid mass flow is calculated；
Second acquisition module, for obtaining the liquid leakage duration；
Second computing module, for according to the leakage liquid mass flow and liquid leakage duration, calculating leakage liquid
Quality；
Third computing module is used for the quality according to the leakage liquid and the liquid leakage duration, calculates the liquid
Leak radius；
First deduce module, for according to the leakage radius of the liquid shown in the three-dimensional map of GIS-Geographic Information System with
Time deduces the variation of liquid leakage range.
9. device is deduced in the liquid leakage accident simulation according to claim 8 based on GIS-Geographic Information System, feature exists
In further including：
Second deduce module, for according to the leakage radius of the liquid calculate leak after evaporate generation vaporous cloud it is dense
Degree distribution, and shown in the three-dimensional map of GIS-Geographic Information System according to the concentration distribution of the vaporous cloud of the generation that evaporates
As the time deduces the variation of the concentration for the vaporous cloud that liquid leakage volatilization generates.
10. device is deduced in the liquid leakage accident simulation according to claim 8 based on GIS-Geographic Information System, feature exists
In：
When the liquid line breach shape is round, the liquid leakage coefficient is 1.00；
When the liquid line breach shape is triangle, the liquid leakage coefficient is 0.95；
When the liquid line breach shape is rectangle, the liquid leakage coefficient is 0.90.
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