CN-122021448-A - Method for inverting typhoon wind speed by using high-rise building wind vibration acceleration signal

CN122021448ACN 122021448 ACN122021448 ACN 122021448ACN-122021448-A

Abstract

The invention discloses a method for inverting typhoon wind speed by utilizing wind vibration acceleration signals of a high-rise building, and relates to the technical field of laser radar actual measurement and wind engineering. The method comprises acquiring acceleration response time course data of building structure during the maximum period of typhoon wind speed, identifying normalized power spectral density, modal frequency and damping ratio of building according to the actually measured acceleration response curve, and extracting maximum acceleration response values in two horizontal directions And Establishing a finite element model of the target building, further establishing a three-dimensional incompressible unsteady flow model for fluid-solid coupling calculation, and obtaining the simulation acceleration of the target building And Simulating acceleration of target building 、 And 、 Comparison is made when 、 And (3) obtaining wind field parameters corresponding to the typhoon grade according to preset conditions, and obtaining typhoon speed maximum period data based on wind field parameter inversion. The invention can carry out data inversion and supplementation on the missing typhoon data by adopting a computational fluid dynamics method.

Inventors

XU YUE
ZOU HONGZENG
Qi yongfeng
LI SHENGPENG
YANG YI
WANG ZHIHUI
YUAN LIJUN
GUO YANLONG
Luo Yingdiao
LIN XINJUN
BAI BAOJUN
WEN KUNBO

Assignees

华南理工大学
中建三局集团有限公司
中建三局集团华南有限公司

Dates

Publication Date: 20260512
Application Date: 20260210

Claims (6)

1. A method for inverting typhoon wind speed by using a high-rise building wind vibration acceleration signal, which is characterized by comprising the following steps: Acquiring acceleration response time course data of a building structure in the period of maximum typhoon wind speed; identifying normalized power spectral density, modal frequency and damping ratio of building according to actual measured acceleration response curve, extracting maximum acceleration response values in two horizontal directions simultaneously And (3) with ; Establishing a numerical wind tunnel model from the actual measurement position to the target building group, defining boundary conditions, and establishing a finite element model of the target building; Constructing a three-dimensional non-compressible unsteady flow model to perform fluid-solid coupling calculation to obtain the simulation acceleration of the target building And ; Simulating acceleration of a target building 、 And (3) with 、 Comparison is made when 、 And (3) obtaining wind field parameters corresponding to the typhoon grade according to preset conditions, and obtaining typhoon speed maximum period data based on wind field parameter inversion.
2. A method for inverting typhoon velocity using high rise building wind vibration acceleration signals according to claim 1, The establishing of the numerical wind tunnel model comprises the following steps: Determining a target building, and acquiring peripheral buildings and other wind shielding barriers from the actual measurement position to the target building; Selecting an SST k-omega turbulence model based on a building group, dividing a calculation domain and grids in a target area, ensuring that the maximum blocking ratio of the building model along the wind direction is less than or equal to 5%, and meeting the space requirement that the building characteristic height of wind upstream is more than or equal to 5 times and the building characteristic height of wind downstream is more than or equal to 10 times; And constructing an inlet boundary condition mathematical model of the equilibrium atmosphere boundary layer, and combining the turbulence model to form a numerical wind tunnel model.
3. A method for inverting typhoon velocity using high rise building wind vibration acceleration signals according to claim 1, Defining boundary conditions comprises determining actual wind direction after logging according to laser radar data, analyzing upstream surface coverage type corresponding to actual wind direction, and setting initial inflow roughness index ; Based on an exponential law model, a novel equilibrium boundary layer mathematical model is adopted to define the inlet boundary condition.
4. A method for inverting typhoon speed using high rise building wind vibration acceleration signal according to claim 3, The novel equilibrium boundary layer mathematical model expression is: , , ; Wherein, the Is the average wind speed; is the ground clearance; Is the reference height; Is that Average wind speed at; Is a floor roughness index; in order to achieve the reduction ratio, ; Is turbulent energy; 、 And Are all constants; is the turbulent frequency.
5. A method for inverting typhoon velocity using high rise building wind vibration acceleration signals according to claim 1, The three-dimensional non-compressible unsteady flow specifically includes: The method is characterized in that a Reynolds average Navier-Stokes equation is used as a momentum equation, an SST k-omega two-way turbulence model is coupled for sealing, a pressure-speed coupling problem is solved based on a SIMPLE algorithm of a finite volume method, on the space discrete, a second-order windward format is adopted as a convection term of the momentum equation and the turbulence model equation, a central difference format is adopted as a diffusion term, and a second-order implicit format is adopted as time propulsion so as to ensure stability and precision of unsteady calculation.
6. A method for inverting typhoon velocity using high rise building wind vibration acceleration signals according to claim 1, The preset conditions comprise: , Wherein, the And (3) with Is an index of precision control.

Description

Method for inverting typhoon wind speed by using high-rise building wind vibration acceleration signal Technical Field The invention relates to the technical field of laser radar actual measurement and wind engineering, in particular to a method for inverting typhoon wind speed by using wind vibration acceleration signals of a high-rise building. Background Typhoons are a strong natural disaster with a mesoscale vortex structure, have the characteristics of high power and strong destructive power, and often cause serious global economic loss and casualties. Especially in the southeast coastal areas of China, due to the influence of geographic positions and climatic conditions, typhoons occur frequently, and a continuous threat is formed to the building safety and social economy of the areas, so that the on-site observation of typhoons is necessary to be systematically enhanced, richer measured data are accumulated, and reliable basis is provided for scientific evaluation of typhoons, optimization of engineering wind-resistant design and improvement of disaster prevention and reduction capability. The traditional typhoon actual measurement mainly adopts equipment such as a mechanical anemometer, an ultrasonic anemometer and the like. With these devices, researchers have achieved significant results in wind characterization actual measurement studies. The single point actual measurement method fixed at a certain specific height of the building cannot obtain the vertical distribution characteristic of the wind profile. In addition, building-mounted anemometers are subject to interference from the building itself, and the resulting data typically requires screening or modification. In order to solve the problems, actual measurement methods such as a wind tower, a GPS detector, a wireless sounding balloon and the like are adopted to acquire more wind field space distribution characteristics. Because of uncertainty of typhoon paths, the fixed devices have difficulty in acquiring complete data of typhoon paths, and in recent years, laser wind radars are used for non-contact detection of wind fields through Doppler frequency shift effect of aerosol particles in the atmosphere on laser signals. Compared with the method, the laser wind-finding radar has the advantages of wide detection range, relatively high precision, flexible layout, portability and the like. The wind power generation system is equivalent to a mobile wind tower, can acquire real-time wind field data from low altitude to kilometer high altitude, and shows great advantages in typhoon measurement. The laser wind-finding radar realizes non-contact accurate detection of a wind field based on Doppler frequency shift effect generated by aerosol particles in the atmosphere on a laser signal. However, during typhoon passing, sky is often in cloudy and dense distribution, and the distribution and concentration of aerosol in the atmosphere change along with strong rainfall weather, and meanwhile, the attenuation and interference of raindrops on laser signals greatly weaken radar effective echo signals, so that a large amount of wind speed and wind direction data are lost. This phenomenon is particularly remarkable in the most critical stage of the wind speed around the typhoon eye wall, and the data in this stage has the most research value for understanding the typhoon wind field structure and evaluating the wind-induced response of the building, thus forming the actual measurement dilemma that the key data is most difficult to acquire Therefore, a method for inverting typhoon wind speed by using wind vibration acceleration signals of high-rise buildings is provided to solve the difficulty existing in the prior art, which is a problem to be solved by the person skilled in the art. Disclosure of Invention In view of the above, the invention provides a method for inverting typhoon wind speed by using a high-rise building wind vibration acceleration signal, which can invert and supplement data of missing typhoon data by adopting a computational fluid dynamics method. In order to achieve the above purpose, the present invention adopts the following technical scheme: A method for inverting typhoon wind speed by using high-rise building wind vibration acceleration signals comprises the following steps: Acquiring acceleration response time course data of a building structure in the period of maximum typhoon wind speed; identifying normalized power spectral density, modal frequency and damping ratio of building according to actual measured acceleration response curve, extracting maximum acceleration response values in two horizontal directions simultaneously And (3) with; Establishing a numerical wind tunnel model from the actual measurement position to the target building group, defining boundary conditions, and establishing a finite element model of the target building; Constructing a three-dimensional non-compressible unsteady flow model to perform fluid-solid co