CN-121977785-A - Method, device and equipment for acquiring wind speed attenuation factor and storage medium

CN121977785ACN 121977785 ACN121977785 ACN 121977785ACN-121977785-A

Abstract

The invention is applied to the field of tunnel measurement, and discloses a method, a device, equipment and a storage medium for acquiring a wind speed attenuation factor. The method is applied to electronic equipment, the electronic equipment obtains wind speed attenuation factors based on a test tunnel attenuation device comprising a tunnel model, a plurality of model jet fans and a plurality of wind speed measuring units, the wind speed measuring units are used for obtaining initial wind speeds of positions where the model jet fans are located, the method comprises the steps of starting the model jet fans, obtaining air outlet wind speeds of the model jet fans after preset time periods, adjusting first distances between sections where the wind speed measuring units are located and sections where the model jet fans are located, determining tunnel average wind speeds corresponding to the sections respectively by using the initial wind speeds of the positions where the wind speed measuring units are located, determining attenuation constants based on the air outlet wind speeds, the tunnel average wind speeds and the first distances, and calculating the wind speed attenuation factors by using the attenuation constants. Thus, the accurate calculation of the wind speed attenuation factor of the tunnel to be tested is realized.

Inventors

BU HE
CHENG HONGJIAN
TAO LIANGLIANG
ZHANG XINYUE
ZENG YANHUA

Assignees

四川沿江宜金高速公路有限公司
四川公路桥梁建设集团有限公司
西南交通大学

Dates

Publication Date: 20260505
Application Date: 20260204

Claims (10)

1. The method for acquiring the wind speed attenuation factor is applied to electronic equipment, the electronic equipment acquires the wind speed attenuation factor based on a test tunnel attenuation device corresponding to a tunnel to be tested, the test tunnel attenuation device comprises a tunnel model corresponding to the tunnel to be tested, a plurality of model jet fans and a plurality of wind speed measuring units, the model jet fans are arranged in parallel in the tunnel model, the wind speed measuring units are arranged on the same height of any section of an air outlet side of each model jet fan in parallel, the wind speed measuring units are used for acquiring initial wind speed corresponding to the position of the wind speed measuring units, and the method comprises the following steps: starting each model jet fan; After a preset time length, obtaining the air outlet air speed of the model jet fan; adjusting a first distance between a section where the wind speed measuring unit is located and a section where each model jet fan is located, and respectively determining the average wind speed of a tunnel corresponding to each section by using initial wind speeds corresponding to the positions where each wind speed measuring unit is located; determining a decay constant based on the air outlet wind speed, the average wind speed of each tunnel and the first distance; And calculating the wind speed attenuation factor of the tunnel to be tested by using the attenuation constant.
2. The method according to claim 1, wherein determining the average wind speed of the tunnel corresponding to each section by using the initial wind speed corresponding to the location of each wind speed measurement unit comprises: determining a plurality of points to be measured based on a preset first width interval and a preset first height interval, wherein the points to be measured are distributed on a section where a wind speed measuring unit is located in a grid shape; acquiring initial wind speeds acquired by the wind speed measuring units at the positions of the points to be measured; calculating the average value of all the initial wind speeds to obtain the average wind speed of the first alternative tunnel; adjusting the first width interval and/or the first height interval to obtain average wind speeds of a plurality of first alternative tunnels; If any two first alternative tunnel average wind speeds have errors smaller than preset errors, determining any one of the first alternative tunnel average wind speeds as a second alternative tunnel average wind speed, determining a first width interval corresponding to the second alternative tunnel average wind speed as a target width interval, and determining the first altitude interval as a target altitude interval; Acquiring average wind speeds of a plurality of second alternative tunnels based on the target width interval and the target height interval; and calculating the average value of the average wind speed of the second alternative tunnel to obtain the average wind speed of the tunnel corresponding to the section.
3. The method of claim 1, wherein the determining the decay constant based on the outlet wind speed, each of the tunnel average wind speeds, and the first distance comprises: respectively obtaining a first ratio between the average wind speed of each tunnel and the wind speed of the air outlet; obtaining a second ratio between each first distance and a preset nozzle radius, wherein the nozzle radius is the radius of the nozzle of the model jet fan; taking the-0.5 power of each second ratio as an independent variable, and performing linear fitting by taking the first ratio as a dependent variable; the slope of the linear fit is determined as the decay constant.
4. The method of claim 1, wherein calculating a wind speed decay factor for the tunnel under test using the decay constant comprises: Acquiring the actual radius of a nozzle of a real jet fan in the tunnel to be tested; obtaining a third ratio between a preset target distance and the actual radius of the nozzle; and determining the product of the-0.5 power of the third ratio and the decay constant as a wind speed decay factor of the tunnel to be tested at the target distance.
5. The method according to claim 1, wherein the tunnel model is made of stainless steel or fireproof plate, and the tunnel model is rectangular or horseshoe-shaped.
6. The method of claim 1, wherein the model jet fan comprises a frequency modulation controller, a motor, a blade and a nozzle, wherein the motor is driven by the frequency modulation controller to rotate the blade to generate a flowing air stream, wherein the nozzle is an air outlet of the model jet fan, and wherein the air outlet is an injection channel of the flowing air stream.
7. The method according to claim 1, wherein the wind speed measurement unit comprises a wind speed probe, a probe fixture corresponding to the wind speed probe, and a wind speed analyzer corresponding to the wind speed probe; The probe clamp is used for fixing the wind speed probe; The wind speed probe is used for collecting the wind speed at the position where the wind speed probe is located to obtain the original wind speed; the wind speed analyzer is used for calibrating the original wind speed to obtain the original wind speed.
8. The device for acquiring the wind speed attenuation factor is applied to electronic equipment, the electronic equipment acquires the wind speed attenuation factor based on a test tunnel attenuation device corresponding to a tunnel to be tested, the test tunnel attenuation device comprises a tunnel model corresponding to the tunnel to be tested, a plurality of model jet fans and a plurality of wind speed measuring units, the model jet fans are arranged in parallel in the tunnel model, the wind speed measuring units are arranged on the same height of any section of an air outlet side of each model jet fan in parallel, the wind speed measuring units are used for acquiring initial wind speed corresponding to the position of the wind speed measuring units, and the device comprises: An opening module configured to open each of the model jet fans; the air outlet air speed acquisition module is configured to acquire the air outlet air speed of the model jet fan after a preset time period; The tunnel average wind speed determining module is configured to adjust a first distance between a section where the wind speed measuring unit is located and a section where each model jet fan is located, and respectively determine the tunnel average wind speed corresponding to each section by using initial wind speeds corresponding to positions where each wind speed measuring unit is located; A constant determination module configured to determine a decay constant based on the outlet wind speed, each of the tunnel average wind speeds, and the first distance; and the calculating module is configured to calculate the wind speed attenuation factor of the tunnel to be tested by using the attenuation constant.
9. An electronic device comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for obtaining a wind speed attenuation factor according to any of claims 1 to 7 when the program instructions are run.
10. A computer readable storage medium having stored thereon computer readable instructions which, when executed by a processor of a computer, cause the computer to perform the method for obtaining a wind speed attenuation factor according to any of claims 1 to 7.

Description

Method, device and equipment for acquiring wind speed attenuation factor and storage medium Technical Field The invention relates to the technical field of tunnel measurement, in particular to a method, a device, equipment and a storage medium for acquiring a wind speed attenuation factor. Background At present, with the continuous expansion of the scale of highway tunnels and the wide application of large-section structures, tunnel ventilation systems face more complex operation demands. The jet fan is used as the most common longitudinal ventilation equipment, and the outflow evolution of the jet fan in a limited space is influenced by factors such as side wall constraint, natural wind interference, multi-jet interaction and the like, so that the actual wind speed attenuation rule is obviously different from the theoretical free jet. In the prior art, on one hand, the analysis of the installation angle, the space and the ventilation efficiency of a single fan or two parallel fans is focused, and the focusing effect, the mutual interference of jet flows and the wind speed attenuation mechanism of a plurality of parallel fans, namely 3 fans, 4 fans and more in a large-section tunnel are not focused enough. On the other hand, the on-site test of the wind speed attenuation factor is limited by traffic organization, equipment arrangement and cost, experimental data are limited, only qualitative conclusion can be obtained, and the wind speed attenuation factor cannot be accurately obtained. Therefore, in order to overcome the technical problems, the invention provides a method, a device, equipment and a storage medium for acquiring a wind speed attenuation factor. Disclosure of Invention The invention aims to provide a method, a device, equipment and a storage medium for acquiring a wind speed attenuation factor so as to acquire the accurate wind speed attenuation factor. The invention is realized by the following technical scheme: The method for acquiring the wind speed attenuation factor is applied to electronic equipment, the electronic equipment acquires the wind speed attenuation factor based on a test tunnel attenuation device corresponding to a tunnel to be tested, the test tunnel attenuation device comprises a tunnel model corresponding to the tunnel to be tested, a plurality of model jet fans and a plurality of wind speed measuring units, the model jet fans are arranged in parallel in the tunnel model, the wind speed measuring units are arranged on the same height of any section on the air outlet side of the model jet fans in parallel, the wind speed measuring units are used for acquiring initial wind speeds corresponding to the positions of the wind speed measuring units, the method comprises the steps of starting the model jet fans, acquiring air outlet wind speeds of the model jet fans after a preset time period, adjusting first distances between sections where the wind speed measuring units are located and sections where the model jet fans are located, respectively determining tunnel average wind speeds corresponding to the sections by using the initial wind speeds where the wind speed measuring units are located, determining attenuation constants based on the air outlet wind speeds, the tunnel average wind speeds and the first distances, and calculating the attenuation constants by using the attenuation constants to be tested. In some embodiments, the method for determining the tunnel average wind speed corresponding to each section by using the initial wind speed corresponding to the position of each wind speed measurement unit includes determining a plurality of points to be measured based on a preset first width interval and a preset first height interval, wherein each point to be measured is distributed on the section where the wind speed measurement unit is located in a grid shape, acquiring the initial wind speed acquired by each wind speed measurement unit at each point to be measured, calculating an average value of each initial wind speed to obtain a first alternative tunnel average wind speed, adjusting the first width interval and/or the first height interval to obtain a plurality of first alternative tunnel average wind speeds, determining any one of the first alternative tunnel average wind speeds as a second alternative tunnel average wind speed when an error between any two first alternative tunnel average wind speeds is smaller than a preset error, determining the first width interval corresponding to the second alternative tunnel average wind speed as a target width interval, determining the first height interval as a target height interval, acquiring the average wind speed based on the target width interval and the target height interval, and acquiring the second alternative tunnel average wind speeds corresponding to the second alternative average wind speed. In some embodiments, the determining the attenuation constant based on the wind speed of the air outlet, the average wind