12 results about "Surface winds" patented technology

The application belongs to the technical field of desertification prevention, and particularly relates to a compound grass-sand barrier construction method and system based on a 'grape' shape, which comprises the following steps: S1: using GPS, a drone and other tools to survey and map the topography of the sand land to be treated, combining historical meteorological data to determine the main wind direction, and planning the sand barrier laying area and 'grape' unit layout; S2: preparing sand barrier construction materials, the materials comprising one or more of straw, corn stalks, reeds and sand willow branches, and screening and processing are performed to ensure the material quality; the 'grape' type cluster net structure design achieves the effect of efficiently interfering with and shunting near-surface wind-sand flow; the 'grape' type sand barrier unit is distributed in a cluster shape by a plurality of small grass bundles, and is connected into a net structure by short grass belts, and this design more effectively interferes with, shunts and guides the wind-sand flow than the uniform grid-shaped grass checkerboard, thereby improving the comprehensive performance of wind erosion prevention and sand burial prevention.

This invention discloses a method, system, and storage medium for identifying the surface wind pressure aerodynamic derivative that quantifies the contribution of aerodynamic instability to geometric shapes. The method includes: simultaneously acquiring the surface wind pressure time history and vibration displacement time history of the structural cross-section; processing the displacement signal to obtain the vibration frequency, amplitude, and phase difference; processing the wind pressure signal to obtain the wind pressure coefficient amplitude and phase difference at each measuring point; based on the theory of self-excited aerodynamics, establishing an explicit analytical formula through harmonic coefficient matching, and calculating the surface wind pressure aerodynamic derivative at each measuring point; analyzing the aerodynamic derivative at each measuring point, evaluating the contribution of each surface region to the overall aerodynamic derivative, and identifying key aerodynamic regions that excite or suppress self-excited vibrations. This invention degrades traditional macroscopic aerodynamic derivatives to spatial micro-elements, establishing a spatial mapping analytical closed chain between local wind pressure and aerodynamic derivatives, realizing spatial visualization and quantitative traceability of aerodynamic stability contributions, and providing a direct basis for targeted optimization of wind resistance for complex cross-sectional structures.

The application relates to a building shape optimization method, which comprises the following steps: in a first case, determining an optimized first value of a first parameter of a target building according to the value of a first index of the target building under a first candidate value of the first parameter, the first index comprising the following first index items: a roof average wind pressure coefficient, an average wind pressure coefficient difference between a windward surface and a leeward surface, and building heating energy consumption; and in a second case, determining an optimized second value of a second parameter of the target building according to the value of a second index of the target building under a second candidate value of the second parameter, the second index comprising the following second index items: a proportion of detection points with a surface wind speed less than a non-snow accumulation wind speed, a proportion of detection points with a roof wind speed less than the non-snow accumulation wind speed, and a proportion of detection points with a ground wind speed less than the non-snow accumulation wind speed.

The application belongs to the technical field of bridge wind resistance engineering, and discloses a numerical simulation method of bridge structure wind load under the action of tornado based on CFD, which comprises the following steps: referring to the geometric configuration of a tornado laboratory simulation device, a CFD calculation domain model of a three-dimensional tornado generator is established, a speed inlet boundary condition is constructed by using Doppler radar observation data of a real tornado, and a three-dimensional tornado wind field is obtained by numerical solution; a vortex ratio is controlled by an inflow angle, and a tornado intensity is controlled by an inlet wind speed. The numerical simulation method of bridge structure wind load under the action of tornado based on CFD aims to solve the problem that in the existing numerical simulation method of tornado wind field based on CFD, an idealized analytical wind field is used as a boundary condition to drive the generation of a wind field, and there is a lack of quantitative mapping relationship between control parameters and wind field structure characteristic quantities, so that the bridge structure surface wind pressure coefficient cannot be systematically obtained under the working conditions of multiple radial positions and wind direction angles.

This invention discloses a method for predicting the spatial distribution of algal blooms in lakes based on near-surface wind vectors and a Bi-GRU-Attention model. The invention employs Empirical Orthogonal Function (EOF) analysis to extract the dominant mode of algal bloom spatial distribution and time coefficients that represent the temporal variation characteristics of algal bloom spatial patterns. Then, a bidirectional gated cyclic unit model based on an attention mechanism is constructed to extract key dynamic features from the wind vector time series and identify wind periods that significantly contribute to the formation of algal bloom spatial distribution patterns. Finally, the time coefficients of the dominant mode of algal bloom spatial distribution are predicted using the wind vector time series state, and the spatial distribution of algal blooms is reconstructed by combining the corresponding spatial modes. This invention provides a new approach for the study of wind-driven algal bloom spatial distribution.

The application provides a lightning protection wind measuring device of an offshore wind turbine, and relates to the technical field of wind power monitoring, which comprises a base, the upper end of the base is provided with a lightning receptor, the lightning receptor comprises a flange fixing disc, a main lightning rod and a framework ring, the flange fixing disc and the framework ring are provided with a wind direction follow-up flow guiding structure, the wind direction follow-up flow guiding structure is installed in cooperation with a first sliding groove in a first ring, a first sealing bearing and a second sealing bearing installed in a second ring, and a first connecting ring, a second connecting ring, a first connecting rod support, a wind tail wing, a second connecting rod support and a trapezoidal arc surface wind guiding indicator installed oppositely, so as to form a complete wind vane structure, which can guide external airflow to flow stably along the streamlined surface of the trapezoidal arc surface wind guiding indicator, disperse the force of wind by using the guiding effect of airflow, reduce the wind resistance load borne by the whole lightning receptor, and avoid the occurrence of inclination, tilt or structural damage of the lightning receptor caused by the continuous impact of strong wind.

This application provides a flow guiding device for an indirect air-cooled tower and an indirect air-cooled tower, including an outlet flow guiding device and a tower bottom flow guiding device. The outlet flow guiding device includes multiple guide plates evenly arranged along the circumference at the top of the tower outlet, with flow holes penetrating through the guide plates. The tower bottom flow guiding device is located at the middle of the bottom of the tower. By setting guide plates at the top of the tower outlet and opening flow holes on the guide plates, crosswinds can be guided, reducing interference from strong crosswinds. By setting the tower bottom flow guiding device at the middle of the tower bottom, resistance to crosswinds is created, resulting in a more uniform wind speed distribution on the outer surface of the heat exchanger finned tube bundle. Through the synergistic effect of the outlet flow guiding device and the tower bottom flow guiding device, the disruption of the aerodynamic field inside the tower by crosswinds is reduced, avoiding uneven heat exchange and efficiency reduction, thereby improving heat exchange efficiency.

This application provides a method for analyzing and mapping thunderstorm disaster areas, including: acquiring data on the cross-sectional width distribution of valleys, data on the radius of curvature of the centerline, and data on the lateral position of the near-surface wind convergence zone within the valley; integrating the acquired data into a unified dataset; calculating the ratio of the radius of curvature to the valley width based on the radius of curvature data and valley width data in the unified dataset, identifying sharp bends where the ratio exceeds a preset threshold, and identifying potential asymmetric convergence areas; based on the location of the convergence center where the convergence zone gathers towards the outside of the bend, shifting the lateral positioning axis of the thunderstorm landing area from the valley floor centerline to the location of the convergence center, generating a corrected landing area positioning axis; and combining the adjusted thunderstorm landing area coordinates with the valley width distribution data to generate a landing area positioning layer in the disaster mapping, smoothing the boundaries of areas with high curvature, and forming a thunderstorm disaster landing area distribution map.

The application belongs to the field of aviation compressor rotating disc, and particularly relates to a wind resistance test method for a compressor rotating disc. The method comprises the following steps: step one, obtaining different test pieces; step two, determining a gas supply mode, and performing wind resistance test on each test piece under the corresponding gas supply mode to measure wind resistance torque of a rotating-static surface and / or a rotating-rotating surface; and step three, calculating wind resistance torque of a compressor inlet disc cavity surface by using a method of adding, subtracting and eliminating. The wind resistance test method for the compressor rotating disc prepares different test pieces, performs wind resistance test on the test pieces under different gas supply modes, and finally obtains wind resistance torque of the compressor inlet disc cavity surface by using the method of adding, subtracting and eliminating. The method solves the technical problem that the traditional method cannot measure wind resistance of a specific surface alone, and has the remarkable advantages of more accurate test and relatively small cost.

The application discloses a sea surface wind speed inversion method based on a marine radar image and belongs to the technical field of ocean remote sensing. The application solves the problem of low wind speed inversion precision of the existing method. The technical scheme of the application is as follows: step 1, original radar image sets are obtained by reading radar files offline, each original radar image is processed to obtain the full distance integral area of the counter-wind direction corresponding to each original radar image, and then a function relationship between the wind speed and the full distance integral area of the counter-wind direction is established according to the wind speed when each original radar image is collected; step 2, the full distance integral area of the counter-wind direction of the radar image to be measured is calculated; and step 3, the full distance integral area of the counter-wind direction calculated in step 2 is substituted into the function of the wind speed and the full distance integral area of the counter-wind direction established in step 1 to obtain the sea surface wind speed when the radar image read in step 2 is collected. The method can be applied to sea surface wind speed inversion.

This invention provides a method and system for predicting wind pressure on structural surfaces based on multi-feature Gaussian process regression, belonging to the field of wind engineering and structural safety technology. Firstly, by constructing a spatiotemporal multidimensional feature set including the mean of the wind pressure coefficient, the standard deviation of the wind pressure coefficient, and the first-order slope of wind pressure variation over time, the invention elevates the simple spatial interpolation problem to a spatiotemporal dynamic regression task. This enables a more accurate establishment of the nonlinear mapping relationship between interpolated features and actual wind pressure values. Secondly, through iterative K-means clustering for physical partitioning, the invention globally and evenly restores the details of wind pressure distribution on the structural surface. Finally, the multi-feature Gaussian process regression model effectively captures the high-frequency pulsation characteristics and extreme value mutations of the wind pressure signal, overcoming the shortcomings of traditional models that predict too smoothly. This achieves accurate assessment of the overall stress state of large, tall structures with extremely low sensor deployment costs, possessing high engineering practical value.