CN-121994931-A - Sound insulation performance evaluation method and system for fireproof plate of transformer substation or converter station building

CN121994931ACN 121994931 ACN121994931 ACN 121994931ACN-121994931-A

Abstract

The application discloses a sound insulation performance evaluation method and system for a building fireproof plate of a transformer substation or a converter station, wherein the method comprises the steps of obtaining an incidence angle of sound waves on the building fireproof plate; the method comprises the steps of analyzing a propagation path of sound waves in a building fireproof plate based on the incidence angle, obtaining sound energy distribution characteristic data of the sound waves in the thickness direction of the building fireproof plate, correcting first acoustic impedance of the sound waves at the boundary of the building fireproof plate according to the sound energy distribution characteristic data, obtaining corrected first acoustic impedance, constructing an acoustic transfer function according to the corrected first acoustic impedance, and evaluating sound insulation performance of the building fireproof plate based on the acoustic transfer function. The embodiment of the application can accurately evaluate the sound insulation performance of the building fireproof plate.

Inventors

YI YONGLI
YOU YUGAN
TANG YAOJING
ZHU HUI
LIU XIAOSHENG
HUANG JILAI
LI MUZI
LI WEI
SHI YIZHI
ZHU CHENYAN
WANG ZIHAO
WANG XINGJIE
LAN TIANHONG
LIU YANDONG
JI JUN
XU JIYAO
HAN YU
XIE HUASEN
NIE JINGKAI
CHEN XIANHUI
XIA MINGHUA

Assignees

国网浙江省电力有限公司温州供电公司
中国电力科学研究院有限公司
应急管理部四川消防研究所
正升环境科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260408

Claims (10)

1. The method for evaluating the sound insulation performance of the fireproof plate of the transformer substation or the converter station building is characterized by comprising the following steps of: Acquiring the incidence angle of sound waves on a building fireproof plate; Based on the incidence angle, analyzing the propagation path of the sound wave in the fireproof plate of the building, and acquiring sound energy distribution characteristic data of the sound wave in the thickness direction of the fireproof plate of the building; correcting the first acoustic impedance of the sound wave at the boundary of the building board according to the acoustic energy distribution characteristic data to obtain a corrected first acoustic impedance; Constructing an acoustic transfer function according to the corrected first acoustic impedance; and evaluating the sound insulation performance of the building fireproof plate based on the acoustic transfer function.
2. The method for evaluating the sound insulation performance of a fireproof plate of a transformer substation or a converter station building according to claim 1, wherein the correcting the first acoustic impedance of the sound wave at the boundary of the fireproof plate according to the sound energy distribution characteristic data to obtain the corrected first acoustic impedance comprises: obtaining a basic correction coefficient corresponding to the change trend of the acoustic energy distribution characteristic data according to a preset corresponding relation; acquiring a first acoustic impedance of sound waves at the boundary of a building fireproof plate and a second acoustic impedance of the sound waves in air; Calculating acoustic impedance mismatch according to the first acoustic impedance and the second acoustic impedance, wherein the acoustic impedance mismatch is used for measuring acoustic property differences of air and the building fireproof plate; Obtaining a final correction coefficient according to the acoustic impedance mismatch degree, the incidence angle and the basic correction coefficient; and correcting the first acoustic impedance by using the final correction coefficient to obtain a corrected first acoustic impedance.
3. The method for evaluating the sound insulation performance of a building fireproof plate of a transformer substation or a converter station according to claim 1, wherein the analyzing the propagation path of the sound wave in the building fireproof plate based on the incident angle to obtain the sound energy distribution characteristic data of the sound wave in the thickness direction of the building fireproof plate comprises the following steps: Based on the incidence angle, tracking the propagation path of the sound wave in the building fireproof plate to obtain the complexity of the propagation path of the sound wave in the building fireproof plate under the incidence angle; according to the complexity of the propagation path, determining the position of a standing wave node of the sound wave propagated in the building fireproof plate; Based on the standing wave node position, finite element meshing and acoustic energy density analysis are carried out on the thickness direction of the building fireproof plate, and acoustic energy distribution characteristic data of the acoustic wave in the thickness direction is obtained, wherein the acoustic energy distribution characteristic data is acoustic energy density.
4. A method of evaluating the sound insulation performance of a fire protection panel for a substation or converter substation building according to claim 3, wherein the complexity of the propagation path is determined by the number of reflections and propagation distances of sound waves within the fire protection panel.
5. A method of evaluating the acoustical performance of a fire protection board for a substation or converter substation building according to claim 3, wherein said determining the location of the standing wave node where the sound wave propagates in the fire protection board for the building based on the propagation path complexity comprises: Calculating phase values of adjacent positions of sound waves in the thickness direction by adopting a multi-layer perceptron neural network according to the complexity of the propagation path, wherein the multi-layer perceptron neural network is obtained by training the complexity of the sample propagation path, the frequency of the sample sound waves and the coordinates of the sample positions in advance; And if the phase value of the adjacent position exceeds a preset threshold value, taking the position coordinate with the phase value of zero or pi integer multiple as a standing wave node in the phase value of the adjacent position.
6. The method for evaluating the sound insulation performance of the fireproof plate of the transformer substation or the converter station building according to claim 3, wherein the finite element meshing and the sound energy density analysis are performed on the thickness direction of the fireproof plate of the building based on the standing wave node position, so as to obtain sound energy distribution characteristic data of sound waves in the thickness direction, and the method comprises the following steps: confirming the grid size based on the standing wave node positions, wherein the grid size is smaller than or equal to the minimum distance between adjacent standing wave node positions; according to the grid size, carrying out finite element grid division on the thickness direction of the building fireproof plate to obtain a plurality of grids; according to the wave equation, calculating sound pressure values of sound waves at nodes of a plurality of grids; and obtaining sound energy distribution characteristic data of the sound wave in the thickness direction according to the sound pressure value.
7. The method for evaluating the sound insulation performance of a fire protection plate for a transformer substation or a converter station building according to claim 1, wherein the constructing an acoustic transfer function according to the corrected first acoustic impedance comprises: Calculating a transmission coefficient according to the corrected first acoustic impedance; And constructing an acoustic transfer function according to the transmission coefficient.
8. The method for evaluating the sound insulation performance of a building fire protection plate of a transformer substation or a converter station according to claim 1, wherein the evaluating the sound insulation performance of the building fire protection plate based on the acoustic transfer function comprises: obtaining the sound insulation quantity of the building fireproof plate at different frequencies by utilizing the acoustic transfer function; and weighting the sound insulation amounts of the different frequencies to obtain the sound insulation amount of the building fireproof plate.
9. A sound insulation performance evaluation system of a fireproof plate of a transformer substation or a converter station building, comprising: the first acquisition module is used for acquiring the incidence angle of the sound wave on the building fireproof plate; The second acquisition module is used for analyzing the propagation path of the sound wave in the fireproof plate of the building based on the incidence angle and acquiring sound energy distribution characteristic data of the sound wave in the thickness direction of the fireproof plate of the building; The correction module is used for correcting the first acoustic impedance of the sound wave at the boundary of the building fireproof plate according to the acoustic energy distribution characteristic data to obtain the corrected first acoustic impedance; The construction module is used for constructing an acoustic transfer function according to the corrected first acoustic impedance; and the evaluation module is used for evaluating the sound insulation performance of the building fireproof plate based on the acoustic transfer function.
10. The system for evaluating the sound insulation performance of a fireproof plate of a transformer substation or a converter station building according to claim 9, wherein the correcting the first acoustic impedance of the sound wave at the boundary of the fireproof plate according to the sound energy distribution characteristic data to obtain the corrected first acoustic impedance comprises: obtaining a basic correction coefficient corresponding to the change trend of the acoustic energy distribution characteristic data according to a preset corresponding relation; acquiring a first acoustic impedance of sound waves at the boundary of a building fireproof plate and a second acoustic impedance of the sound waves in air; Calculating acoustic impedance mismatch according to the first acoustic impedance and the second acoustic impedance, wherein the acoustic impedance mismatch is used for measuring acoustic property differences of air and the building fireproof plate; Obtaining a final correction coefficient according to the acoustic impedance mismatch degree, the incidence angle and the basic correction coefficient; and correcting the first acoustic impedance by using the final correction coefficient to obtain a corrected first acoustic impedance.

Description

Sound insulation performance evaluation method and system for fireproof plate of transformer substation or converter station building Technical Field The application relates to the technical field of performance evaluation of building fireproof plates, in particular to a sound insulation performance evaluation method and system of a building fireproof plate of a transformer substation or a converter station. Background With increasingly strict industrial safety requirements, building board standards of transformer substations or converter stations are continuously upgraded, and high voltage and high current generated when power equipment provided with the building board standards runs are hidden in fire and explosion hidden dangers, so that continuous high noise is more threatening to personnel health. Under the background, the importance of the performance evaluation of the building fireproof plate of the transformer substation or the converter station is more remarkable, and the safety risk can be effectively prevented and the safe and stable operation of the equipment can be ensured by evaluating key performance indexes such as fireproof explosion venting, sound insulation and the like. At present, the evaluation of sound insulation performance still depends on a simplified theoretical model, and calculation is simplified by setting static boundary conditions, but the method ignores a complex propagation mechanism of sound waves in a material, and cannot adapt to dynamic sound field evolution in a building fireproof plate in actual engineering, so that the model is difficult to accurately reflect the real acoustic performance of the building fireproof plate, and finally the evaluation of sound insulation performance is influenced. Disclosure of Invention The application provides a sound insulation performance evaluation method and system for a building fireproof plate of a transformer substation or a converter station, which are used for solving the problems that in the prior art, calculation is simplified by setting static boundary conditions, so that a model is difficult to accurately reflect the real acoustic performance of the building fireproof plate, and finally the evaluation of the sound insulation performance is influenced. In order to achieve the above object, the embodiment of the present application provides a method for evaluating sound insulation performance of a fireproof plate of a transformer substation or a converter station building, including: Acquiring the incidence angle of sound waves on a building fireproof plate; Based on the incidence angle, analyzing the propagation path of the sound wave in the fireproof plate of the building, and acquiring sound energy distribution characteristic data of the sound wave in the thickness direction of the fireproof plate of the building; Correcting the first acoustic impedance of the sound wave at the boundary of the building fireproof plate according to the acoustic energy distribution characteristic data to obtain the corrected first acoustic impedance; Constructing an acoustic transfer function according to the corrected first acoustic impedance; and evaluating the sound insulation performance of the building fireproof plate based on the acoustic transfer function. As an improvement of the above solution, the correcting the first acoustic impedance of the sound wave at the boundary of the building fireproof plate according to the acoustic energy distribution characteristic data to obtain the corrected first acoustic impedance includes: obtaining a basic correction coefficient corresponding to the change trend of the acoustic energy distribution characteristic data according to a preset corresponding relation; acquiring a first acoustic impedance of sound waves at the boundary of a building fireproof plate and a second acoustic impedance of the sound waves in air; Calculating acoustic impedance mismatch according to the first acoustic impedance and the second acoustic impedance, wherein the acoustic impedance mismatch is used for measuring acoustic property differences of air and the building fireproof plate; Obtaining a final correction coefficient according to the acoustic impedance mismatch degree, the incidence angle and the basic correction coefficient; and correcting the first acoustic impedance by using the final correction coefficient to obtain a corrected first acoustic impedance. As an improvement of the above-mentioned scheme, the analyzing the propagation path of the sound wave in the building fireproof plate based on the incident angle, obtaining the sound energy distribution characteristic data of the sound wave in the thickness direction of the building fireproof plate includes: Based on the incidence angle, tracking the propagation path of the sound wave in the building fireproof plate to obtain the complexity of the propagation path of the sound wave in the building fireproof plate under the incidence angle; according to the c