CN113065184B - Method and device for predicting wind field of arch dam construction area - Google Patents
Method and device for predicting wind field of arch dam construction area Download PDFInfo
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Abstract
The invention provides a method and a device for predicting wind fields in an arch dam construction area, wherein the method comprises the following steps: acquiring wind field data in an arch dam construction area through a weather station arranged in the arch dam construction area; building a real terrain model of an arch dam construction area through wind field data; based on the obtained wind field data, determining wind field boundary conditions under different conditions according to a real terrain model, construction machinery materials and construction progress of an arch dam construction area; and analyzing the wind field in the arch dam construction area by adopting a numerical simulation method according to the boundary conditions of the wind field. According to the method, the real terrain model is built by collecting real wind field data, then the construction process of the dam is divided into different progress, different wind field boundary conditions are calculated according to the structural form of the dam, the construction progress of different dam sections, the excavation faces of the left and right dam shoulders and the like, and finally the key part templates are analyzed and timely early warning is provided, so that the functions of multi-element sensing, high-efficiency analysis and timely response prevention for the wind field of the arch dam construction area are realized.
Description
Technical Field
The application belongs to the technical field of arch dam construction, and particularly relates to a method and a device for predicting wind fields in an arch dam construction area.
Background
Arch dam construction areas are typically found in narrow valleys with complex terrain and severe climatic conditions. Under the coupling effect of complex topography and strong wind weather, local wind fields have instantaneous huge changes, and structures such as dam abutment excavation surfaces of the dam site area of the arch dam are complex form complex wind field boundaries which change along with time, so that the wind fields of the dam site area become more complex, partial structures form a narrow pipe effect, the strength of the wind fields can be further amplified, and the high-strength wind fields can have huge influences on the construction quality, progress and safety of the arch dam.
The existing wind field simulation is mainly used for plain, hilly or offshore wind field construction evaluation, the terrain of the area is simple, the wind field boundary is simple, the measurement requirement can be met by adopting a small weather station, but the wind field simulation is lack of high-efficiency analysis on large-scale complex terrain wind fields, accurate and effective prevention and control strategies are not provided for personnel, materials, equipment and the like, and timely early warning information cannot be provided, so that related safety accidents such as cable machines, personnel and the like occur.
Disclosure of Invention
The application provides a method and a device for predicting wind fields in an arch dam construction area, which at least solve the problem that wind fields of large-scale complex terrains lack effective analysis by using current wind field simulation.
According to one aspect of the present application, there is provided a method for predicting a wind field in an arch dam construction area, including:
acquiring wind field data in an arch dam construction area through a weather station arranged in the arch dam construction area, wherein the wind field data comprises wind speed data, weather data and weather data;
building a real terrain model of an arch dam construction area through wind field data;
based on the obtained wind field data, determining wind field boundary conditions under different conditions according to a real terrain model, construction machinery materials and construction progress of an arch dam construction area;
and analyzing the wind field in the arch dam construction area by adopting a numerical simulation method according to the boundary conditions of the wind field.
In one embodiment, the arch dam construction area wind field prediction method further comprises:
and carrying out safety early warning according to wind field analysis results in the arch dam construction area.
In an embodiment, based on the acquired wind field data, determining wind field boundary conditions under different conditions according to a real terrain model, construction machine materials and construction progress of an arch dam construction area includes:
classifying the real terrain model according to terrain, wherein the terrain type comprises: vegetation areas, excavation bare areas, concrete slope areas, water surfaces and dam surfaces;
measuring and establishing an interface area wind speed distribution model and a roughness model according to the terrain type, and constructing a wind field boundary;
determining a wind field generated by the construction machinery materials under the strong wind condition according to the shapes of the construction machinery materials;
determining construction morphology change conditions according to construction progress;
generating wind field boundary conditions under different conditions according to wind field boundaries, wind fields generated by construction machinery materials and construction morphology change conditions.
In one embodiment, according to the boundary conditions of the wind field, a numerical simulation method is used to analyze the wind field in the arch dam construction area, including:
based on wind field boundary conditions, solving a turbulence Navirt-stocks equation by adopting a time correlation method, and performing preliminary calculation to obtain first wind field analysis data;
based on the first wind field analysis data, adopting a limited volume discrete method of a central node to process to obtain second wind field analysis data;
based on the second wind field analysis data, processing by adopting an explicit change-kutta method to obtain third wind field analysis data;
and carrying out full multi-grid initial field processing and multi-grid iterative acceleration convergence on the third wind field analysis data to obtain final analysis data of the wind field in the arch dam construction area.
In one embodiment, the safety precaution is performed according to the wind field analysis result in the arch dam construction area, including:
and monitoring wind speed data in real time from the final analysis data, and triggering safety early warning when the wind speed data exceeds a preset value.
According to another aspect of the present application, there is also provided a wind field prediction apparatus for an arch dam construction area, including:
the data acquisition unit is used for acquiring wind field data in the arch dam construction area through a weather station arranged in the arch dam construction area, wherein the wind field data comprises wind speed data, weather data and weather data;
the real terrain model building unit is used for building a real terrain model of the arch dam construction area through wind field data;
the wind field boundary condition acquisition unit is used for determining wind field boundary conditions under different conditions according to the real terrain model, the construction machinery materials and the construction progress of the arch dam construction area based on the acquired wind field data;
and the wind field analysis unit is used for analyzing the wind field in the arch dam construction area by adopting a numerical simulation method according to the boundary conditions of the wind field.
In one embodiment, the arch dam construction area wind field prediction apparatus further comprises:
and the safety early warning unit is used for carrying out safety early warning according to the wind field analysis result in the arch dam construction area.
In an embodiment, the wind farm boundary condition acquisition unit includes:
the terrain classification module is used for classifying the real terrain model according to the terrain, and the terrain types comprise: vegetation areas, excavation bare areas, concrete slope areas, water surfaces and dam surfaces;
the wind field boundary construction module is used for measuring and establishing an interface area wind speed distribution model and a roughness model according to the terrain type and is used for constructing a wind field boundary;
the first element determining module is used for determining a wind field generated by the construction machinery materials under the condition of strong wind according to the appearance of the construction machinery materials;
the second element determining module is used for determining the construction morphology change condition according to the construction progress;
the wind field boundary condition generation module is used for generating wind field boundary conditions under different conditions according to wind field boundaries, wind fields generated by construction machinery materials and construction morphology change conditions.
In an embodiment, the wind field analysis unit comprises:
the first calculation module is used for solving a turbulence Navirt-stocks equation by adopting a time correlation method based on wind field boundary conditions to perform preliminary calculation so as to obtain first wind field analysis data;
the second calculation module is used for processing the first wind field analysis data by adopting a limited volume discrete method of the central node to obtain second wind field analysis data;
the third calculation module is used for processing the second wind field analysis data by adopting an explicit change-kutta method to obtain third wind field analysis data;
and the analysis module is used for carrying out full multi-grid initial field processing and multi-grid iterative acceleration convergence on the third wind field analysis data to obtain final analysis data of the wind field in the arch dam construction area.
In one embodiment, the safety precaution unit includes:
and the threshold comparison module is used for monitoring the wind speed data in real time from the final analysis data, and triggering safety early warning when the wind speed data exceeds a preset value.
The method comprises the steps of constructing a real terrain model of a construction area by collecting real wind field data, dividing the construction process of a dam into different schedules, calculating different wind field boundary conditions according to the structural form of the dam, the construction schedule of different dam sections, template layout, cable machine operation, drainage holes, left and right dam foundation excavation surfaces and the like, analyzing and providing timely early warning on key part templates, and achieving the functions of multi-element perception, efficient analysis and timely response prevention on the wind field of the construction area of the arch dam.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for predicting a wind field in an arch dam construction area.
Fig. 2 is a flowchart of a method for determining boundary conditions of a wind farm under different conditions in an embodiment of the present application.
FIG. 3 is a flow chart of a method of analyzing a wind field within an arch dam construction area in an embodiment of the present application.
Fig. 4 is a simulated embodiment of the present application in an embodiment of the present application.
Fig. 5 is a block diagram of a wind field prediction apparatus for an arch dam construction area according to the present application.
Fig. 6 is a block diagram showing the structure of a farm boundary condition acquiring unit according to the embodiment of the present application.
Fig. 7 is a block diagram of the structure of a wind farm analysis unit according to the embodiment of the present application.
Fig. 8 is a specific implementation of an electronic device in an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The wind field simulation of the existing arch dam construction area is mainly used for construction evaluation of plain, hills or offshore wind power plants, the terrain of the area is simple, the wind field boundary is simple, the measurement requirements can be met by adopting a small weather station, but the wind field simulation of the existing arch dam construction area is lack of high-efficiency analysis of large-scale complex terrain wind fields, accurate and effective prevention and control strategies are not provided for personnel, materials, equipment and the like, timely early warning information cannot be provided, and related safety accidents such as cable machines and personnel are caused.
Based on the above problems, the present application provides a method for predicting a wind field in an arch dam construction area, as shown in fig. 1, including:
s101: wind field data in the arch dam construction area is acquired through a weather station arranged in the arch dam construction area, wherein the wind field data comprises wind speed data, weather data and weather data.
S102: and constructing a real terrain model of the arch dam construction area through wind field data.
S103: based on the obtained wind field data, determining wind field boundary conditions under different conditions according to the real terrain model, the construction machinery materials and the construction progress of the arch dam construction area.
S104: and analyzing the wind field in the arch dam construction area by adopting a numerical simulation method according to the boundary conditions of the wind field.
The specific data obtained by various weather stations are as follows:
the anemometer is used for acquiring information such as wind speed, wind direction, duration time, coordinate elevation and the like;
the weather station is used for acquiring information such as space coordinates, temperature, humidity, wind speed, wind direction, air density, atmospheric pressure, solar radiation and the like;
weather forecast, which is used to know the temperature distribution, humidity distribution and air pressure distribution of the area;
the statistics and probability analysis are used for key section historical data statistics, wherein the key section historical data statistics comprise different years, different month wind speeds, wind directions, maximum wind speeds, duration and the like, an annual wind field prediction model is built based on the key section historical data statistics, and the probability of occurrence of high wind is predicted based on time and is used for subsequent prediction and early warning.
In a specific embodiment, how to obtain the wind field boundary conditions is as follows:
the wind field distribution and boundary conditions of the complex terrain, the different terrains and terrains of the complex construction area and the construction elements are different on different scales. The complex terrain model system for constructing the arch dam construction area can adopt unmanned aerial vehicles, inSar system lifting satellites and the like to construct a large-scale terrain model for the dam site area.
In a specific embodiment, the terrain features comprise vegetation areas, excavated exposed areas, concrete slope areas, water surfaces, dam surfaces and the like, and models of wind speed distribution, roughness and the like of interface areas can be measured and established by anemometers according to different terrain features, so that wind field boundaries are accurately constructed.
In one embodiment, the work machine material: different machines (cable machine, vibrator, excavator, automatic sprayer, truck, etc.), water chilling unit, monitoring and data relay device, etc.), materials (templates, reinforcing bars, heat-insulating plates, etc.) for the construction of the warehouse surface can generate different wind fields under the condition of strong wind.
In one embodiment, the construction progress: the 300 m-level high arch dam has huge body type, the construction period is usually 3-5 years long, dozens of dam sections are constructed simultaneously, the construction morphology changes every day, the wind field distribution is obviously influenced by structures such as canyon wind fields, dam face structures, adjacent dam section height differences, flood discharge holes, elevator shafts, galleries and the like, and the wind field distribution has certain commonality but also has certain difference in different construction progress, so that the wind field distribution needs to be measured and evaluated in time.
In one embodiment, the arch dam construction area wind field prediction method further comprises:
and carrying out safety early warning according to wind field analysis results in the arch dam construction area.
In order to facilitate on-site execution and operation, according to personnel, equipment and structural bearing capacity obtained through simulation analysis, different protection measures are adopted for different objects, and the early warning index is usually wind speed.
In one embodiment, based on the acquired wind field data, determining wind field boundary conditions under different conditions according to the real terrain model, the construction machine materials and the construction progress of the arch dam construction area, as shown in fig. 2, includes:
s201: classifying the real terrain model according to terrain, wherein the terrain type comprises: vegetation areas, excavation bare areas, concrete slope areas, water surfaces and dam surfaces.
S202: and measuring and establishing an interface area wind speed distribution model and a roughness model according to the terrain type, and constructing a wind field boundary.
S203: and determining a wind field generated by the construction machinery materials under the condition of strong wind according to the appearance of the construction machinery materials.
S204: and determining the construction morphology change condition according to the construction progress.
S205: generating wind field boundary conditions under different conditions according to wind field boundaries, wind fields generated by construction machinery materials and construction morphology change conditions.
In a specific embodiment, in different construction stages, the influence of the body type of the dam on the wind field of the dam area is larger, as the height of the dam is increased, the air flowing through the dam surface is caused to flow back in a low-pressure area which is more and more obvious, the flow speed is obviously reduced, different forms of vortex are formed after the dam under the conditions of different wind directions and wind speeds, the flow field energy is increased along with the increase loss of the dam height, the flow speed is lower, the wind field is mainly formed along the river to the left side of the dam according to the topography, the flow speed is reduced compared with the incoming flow, the flow field of the right side concave area is more complex, the spiral ascending air flows in different forms are formed, and the flow speed is higher; the wind speed at the position of the dam abutment is increased by about 5-9m/s compared with the wind speed at the position of the incoming flow.
Most of wind fields near the bin surface come from vortex backflow of the wind surface of the dam body, the wind speed of the bin surface is reduced compared with the wind speed of incoming flow due to the action of viscous laminar flow, and the wind speed of the bin surface is less than 5m/s under the condition of six-level wind incoming flow of a river valley; the lower the template height, the less the vortex is formed by the wind and the more pronounced the trend is, the higher the wind speed is, compared to about 0.4m/s, at template heights of 3m and 4.5m, respectively.
And accurately measuring wind fields in different areas by the meteorological device to acquire wind field analysis boundary conditions such as wind speed, wind direction, flow velocity distribution, turbulent kinetic energy, turbulent dissipation rate, turbulent intensity and the like.
In one embodiment, according to the boundary conditions of the wind field, a numerical simulation method is used to analyze the wind field in the arch dam construction area, as shown in fig. 3, including:
s301: based on wind field boundary conditions, a time correlation method is adopted to solve a turbulence Navirt-stocks equation, and preliminary calculation is carried out to obtain first wind field analysis data.
S302: based on the first wind field analysis data, a limited volume discrete method of the central node is adopted for processing to obtain second wind field analysis data.
S303: and processing by adopting an explicit change-kutta method based on the second wind field analysis data to obtain third wind field analysis data.
S304: and carrying out full multi-grid initial field processing and multi-grid iterative acceleration convergence on the third wind field analysis data to obtain final analysis data of the wind field in the arch dam construction area.
The S301-S304 sections mainly include two items, the first is the actual topography of the construction area, and the second is the characteristics associated with the arch dam.
Wherein the data of the real topography for wind field analysis mainly comprises spatial coordinate information, surface feature roughness (see step3, above, different surface features have an important influence on the wind field distribution.)
Wherein the arch dam related features include: the method comprises the following steps of concrete side slopes near the dam body, dam foundation excavation surfaces, dam foundation attachment angles, various functional holes (surface holes, deep holes, elevator shafts, galleries), geometric characteristics, space coordinates, surface roughness, turbulence characteristic parameters and the like of the dam body and the bin surface.
And obtaining boundary conditions of various wind fields based on the steps, and analyzing the wind fields by combining a numerical simulation technology.
The method mainly adopts Fluent software to calculate, and adopts a numerical calculation and processing method to solve a turbulence Navirt-stocks equation, a limited volume dispersion of a central node, an explicit change-kutta method, full multi-grid initial field processing and multi-grid iterative acceleration convergence for a time correlation method. The turbulence model used in the calculation is a turbulence model with a wall function.
In a specific embodiment, the influence of strong wind on the wind field environment of the concrete warehouse surface is different according to different relative positions of the warehouse surface and different heights of templates added on each warehouse surface. As shown in fig. 4, the wind field distribution under the influence of the downriver and crosswind, and the wind load imposed on the template.
In one embodiment, the safety precaution is performed according to the wind field analysis result in the arch dam construction area, including:
and monitoring wind speed data in real time from the final analysis data, and triggering safety early warning when the wind speed data exceeds a preset value.
In a specific embodiment, in order to facilitate on-site execution and operation, according to personnel, equipment and structural bearing capacity obtained by simulation analysis, different protection measures are adopted for different objects, and the early warning index is usually wind speed.
Aiming at personnel protection: because the construction area is complex, wind fields in different areas at the same time have great difference, and therefore, hierarchical early warning is adopted for staff working in different areas, and the early warning wind speed value is given according to simulation results. For example, the maximum wind speed measured by an upstream cofferdam weather station reaches 20m/s, at the moment, the personnel on the face of the cofferdam immediately receive early warning and stop working, and the personnel in the areas such as a stirring station, a corridor and the like can continue working.
For equipment protection: different construction equipment adopts different early warning wind speeds and measures. If the wind speed breaks through a certain value, the cable machine needs to stop working, and the cabin surface mechanical equipment needs or does not need to be reinforced.
Aiming at concrete materials, when the wind speed, the humidity and the temperature reach the threshold values, the temperature difference of the bin surface is increased, the humidity is scattered, and the like, so that the concrete is cracked and loses efficacy, and early warning treatment is needed in time.
Based on the same inventive concept, the embodiments of the present application also provide a wind field prediction apparatus for an arch dam construction area, which may be used to implement the method described in the above embodiments, as described in the following embodiments. Because the principle of solving the problem of the arch dam construction area wind field prediction device is similar to that of the arch dam construction area wind field prediction method, the implementation of the arch dam construction area wind field prediction device can be referred to the implementation of the arch dam construction area wind field prediction method, and repeated parts are not repeated. As used below, the term "unit" or "module" may be a combination of software and/or hardware that implements the intended function. While the system described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
According to another aspect of the present application, there is also provided a wind field prediction apparatus for an arch dam construction area, as shown in fig. 5, including:
a data acquisition unit 501 for acquiring wind field data in the arch dam construction area, including wind speed data, weather data, and weather data, through a weather station provided in the arch dam construction area;
a real terrain model construction unit 502, configured to construct a real terrain model of the arch dam construction area through wind field data;
a wind field boundary condition obtaining unit 503, configured to determine wind field boundary conditions under different conditions according to the real terrain model, the construction machinery materials and the construction progress of the arch dam construction area based on the obtained wind field data;
and the wind field analysis unit 504 is used for analyzing the wind field in the arch dam construction area by adopting a numerical simulation method according to the boundary conditions of the wind field.
In one embodiment, the arch dam construction area wind field prediction apparatus further comprises:
and the safety early warning unit is used for carrying out safety early warning according to the wind field analysis result in the arch dam construction area.
In an embodiment, as shown in fig. 6, the wind farm boundary condition acquisition unit 503 includes:
the terrain classification module 601 is configured to classify a real terrain model according to terrain, where the terrain types include: vegetation areas, excavation bare areas, concrete slope areas, water surfaces and dam surfaces;
the wind field boundary construction module 602 is used for measuring and establishing an interface area wind speed distribution model and a roughness model according to the terrain type, and is used for constructing a wind field boundary;
a first element determining module 603, configured to determine a wind field generated by the construction machine material under a strong wind condition according to the shape of the construction machine material;
a second element determining module 604, configured to determine a construction morphology change condition according to a construction progress;
the wind field boundary condition generating module 605 is configured to generate wind field boundary conditions under different conditions according to wind field boundaries, wind fields generated by materials of construction machinery, and construction morphology change conditions.
In one embodiment, as shown in fig. 7, the wind field analysis unit 504 includes:
the first calculation module 701 is configured to solve a turbulent flow Navirt-stocks equation by using a time correlation method based on a wind field boundary condition to perform preliminary calculation to obtain first wind field analysis data;
a second calculation module 702, configured to obtain second wind farm analysis data by processing the first wind farm analysis data with a finite volume discrete method of the center node;
a third calculation module 703, configured to obtain third wind farm analysis data by performing processing using an explicit change-kutta method based on the second wind farm analysis data;
and the analysis module 704 is used for carrying out full multi-grid initial field processing and multi-grid iterative acceleration convergence on the third wind field analysis data to obtain final analysis data of the wind field in the arch dam construction area.
In one embodiment, the safety precaution unit includes:
and the threshold comparison module is used for monitoring the wind speed data in real time from the final analysis data, and triggering safety early warning when the wind speed data exceeds a preset value.
The embodiment of the present application further provides a specific implementation manner of an electronic device capable of implementing all the steps in the method in the foregoing embodiment, and referring to fig. 8, the electronic device specifically includes the following:
a processor 801, memory 802, communication interface (Communications Interface) 803, bus 804, and non-volatile storage 805;
wherein, the processor 801, the memory 802, and the communication interface 803 complete communication with each other through the bus 804;
the processor 801 is configured to invoke the computer program in the memory 802 and the nonvolatile memory 805, where the processor executes the computer program to implement all the steps in the method in the foregoing embodiment, for example, the processor executes the computer program to implement the following steps:
s101: wind field data in the arch dam construction area is acquired through a weather station arranged in the arch dam construction area, wherein the wind field data comprises wind speed data, weather data and weather data.
S102: and constructing a real terrain model of the arch dam construction area through wind field data.
S103: based on the obtained wind field data, determining wind field boundary conditions under different conditions according to the real terrain model, the construction machinery materials and the construction progress of the arch dam construction area.
S104: and analyzing the wind field in the arch dam construction area by adopting a numerical simulation method according to the boundary conditions of the wind field.
The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the method in the above embodiments, the computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements all the steps of the method in the above embodiments, for example, the processor implements the following steps when executing the computer program:
s101: wind field data in the arch dam construction area is acquired through a weather station arranged in the arch dam construction area, wherein the wind field data comprises wind speed data, weather data and weather data.
S102: and constructing a real terrain model of the arch dam construction area through wind field data.
S103: based on the obtained wind field data, determining wind field boundary conditions under different conditions according to the real terrain model, the construction machinery materials and the construction progress of the arch dam construction area.
S104: and analyzing the wind field in the arch dam construction area by adopting a numerical simulation method according to the boundary conditions of the wind field.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a hardware+program class embodiment, the description is relatively simple, as it is substantially similar to the method embodiment, as relevant see the partial description of the method embodiment. Although the present description provides method operational steps as described in the examples or flowcharts, more or fewer operational steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution. When implemented in an actual device or end product, the instructions may be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment, or even in a distributed data processing environment) as illustrated by the embodiments or by the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, it is not excluded that additional identical or equivalent elements may be present in a process, method, article, or apparatus that comprises a described element. For convenience of description, the above devices are described as being functionally divided into various modules, respectively. Of course, when implementing the embodiments of the present disclosure, the functions of each module may be implemented in the same or multiple pieces of software and/or hardware, or a module that implements the same function may be implemented by multiple sub-modules or a combination of sub-units, or the like. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form. The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. It will be appreciated by those skilled in the art that embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, the present specification embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present description embodiments may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments. In the description of the present specification, reference to the term "one embodiment" or "a particular embodiment" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiment of the present specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. The foregoing is merely an example of an embodiment of the present disclosure and is not intended to limit the embodiment of the present disclosure. Various modifications and variations of the illustrative embodiments will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the embodiments of the present specification, should be included in the scope of the claims of the embodiments of the present specification.
Claims (8)
1. A method for predicting a wind field in an arch dam construction area, comprising:
acquiring wind field data in an arch dam construction area through a weather station arranged in the arch dam construction area, wherein the wind field data comprises wind speed data, weather data and weather data;
constructing a real terrain model of an arch dam construction area through the wind field data;
based on the obtained wind field data, determining wind field boundary conditions under different conditions according to the real terrain model, the construction machinery materials and the construction progress of an arch dam construction area;
according to the boundary conditions of the wind field, analyzing the wind field in the arch dam construction area by adopting a numerical simulation method;
the arch dam construction area wind field prediction method further comprises the following steps:
carrying out safety early warning according to wind field analysis results in the arch dam construction area;
based on the obtained wind field data, determining wind field boundary conditions under different conditions according to the real terrain model, the construction machinery materials and the construction progress of the arch dam construction area, including:
classifying the real terrain model according to terrain, wherein the terrain type comprises: vegetation areas, excavation bare areas, concrete slope areas, water surfaces and dam surfaces;
measuring and establishing an interface area wind speed distribution model and a roughness model according to the terrain type, and constructing a wind field boundary;
determining a wind field generated by the construction machinery materials under the strong wind condition according to the shapes of the construction machinery materials;
determining construction morphology change conditions according to the construction progress;
generating wind field boundary conditions under different conditions according to the wind field boundary, the wind field generated by the construction machinery materials and the construction morphology change condition.
2. A method for predicting a wind field in an arch dam construction area according to claim 1, wherein said analyzing the wind field in the arch dam construction area by using a numerical simulation method according to the boundary conditions of the wind field comprises:
based on the wind field boundary conditions, solving a turbulence Navirt-stocks equation by adopting a time correlation method, and performing preliminary calculation to obtain first wind field analysis data;
based on the first wind field analysis data, adopting a limited volume discrete method of a central node to process to obtain second wind field analysis data;
based on the second wind field analysis data, processing by adopting an explicit change-kutta method to obtain third wind field analysis data;
and performing full multi-grid initial field processing and multi-grid iterative acceleration convergence on the third wind field analysis data to obtain final analysis data of the wind field in the arch dam construction area.
3. A method for predicting a wind field in an arch dam construction area according to claim 2, wherein the safety precaution is performed according to a wind field analysis result in the arch dam construction area, comprising:
and monitoring wind speed data in real time from the final analysis data, and triggering safety early warning when the wind speed data exceeds a preset value.
4. An arch dam construction area wind field prediction apparatus, comprising:
the data acquisition unit is used for acquiring wind field data in the arch dam construction area through a weather station arranged in the arch dam construction area, wherein the wind field data comprises wind speed data, weather data and weather data;
the real terrain model building unit is used for building a real terrain model of the arch dam construction area through the wind field data;
the wind field boundary condition acquisition unit is used for determining wind field boundary conditions under different conditions according to the acquired wind field data, the real terrain model, the construction machinery materials of an arch dam construction area and the construction progress;
the wind field analysis unit is used for analyzing the wind field in the arch dam construction area by adopting a numerical simulation method according to the wind field boundary conditions;
the arch dam construction area wind field prediction device further comprises:
the safety early warning unit is used for carrying out safety early warning according to wind field analysis results in the arch dam construction area;
the wind field boundary condition acquisition unit includes:
the terrain classification module is used for classifying the real terrain model according to the terrain, and the terrain type comprises: vegetation areas, excavation bare areas, concrete slope areas, water surfaces and dam surfaces;
the wind field boundary construction module is used for measuring and establishing an interface area wind speed distribution model and a roughness model according to the terrain type and is used for constructing a wind field boundary;
the first element determining module is used for determining a wind field generated by the construction machinery materials under the condition of strong wind according to the appearance of the construction machinery materials;
the second element determining module is used for determining the construction morphology change condition according to the construction progress;
the wind field boundary condition generation module is used for generating wind field boundary conditions under different conditions according to the wind field boundary, the wind field generated by the construction machinery materials and the construction morphology change condition.
5. An arch dam construction area wind field prediction apparatus according to claim 4, wherein the wind field analysis unit comprises:
the first calculation module is used for solving a turbulence Navirt-stocks equation by adopting a time correlation method based on the wind field boundary condition to perform preliminary calculation so as to obtain first wind field analysis data;
the second calculation module is used for processing the first wind field analysis data by adopting a limited volume discrete method of the central node to obtain second wind field analysis data;
the third calculation module is used for processing the second wind field analysis data by adopting an explicit change-kutta method to obtain third wind field analysis data;
and the analysis module is used for carrying out full multi-grid initial field processing and multi-grid iterative acceleration convergence on the third wind field analysis data to obtain final analysis data of the wind field in the arch dam construction area.
6. An arch dam construction area wind field prediction apparatus according to claim 5, wherein the safety pre-warning unit comprises:
and the threshold comparison module is used for monitoring the wind speed data in real time from the final analysis data, and triggering safety early warning when the wind speed data exceeds a preset value.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor performs the steps of the arch dam construction area wind field prediction method of any one of claims 1 to 3 when the program is executed.
8. A computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of a method of arch dam construction area wind field prediction as claimed in any one of claims 1 to 3.
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