31 results about "Wind engineering" patented technology

The invention relates to a wind-resistant design method of a cable-membrane structure based on strong coupling overall technology, which establishes the initial form of the cable-membrane structure; establishes the control equation of the fluid-solid coupling system and the coupling conditions at the fluid-solid interface, and performs time-space discretization on it, Obtain the strong coupling overall equation of the fluid-solid coupling system; use the SST K‑ω turbulence model to simulate turbulence, obtain the strong coupling overall equation of the fluid-solid coupling system considering the turbulence model, and use the Newton method to linearize it; after constructing the linearized The preprocessor of the strong coupling global equation matrix, obtains the strong coupling global equation of the fluid-solid coupling system with the preprocessor, uses the Krylov subspace projection method to solve it, and obtains the strong coupling global equation fluid pressure, fluid velocity, The displacement of the cable-membrane structure and the displacement of the linear elastic finite element model; thus, the wind-resistant design of the cable-membrane structure is carried out, and the wind-resistant design parameters are obtained.

A bidirectional limit mechanism of laminated U-shaped steel plates, belonging to the field of anti-seismic, shock-absorbing and wind-resistant technologies for engineering structures, comprising laminated U-shaped steel plates (1), U-shaped steel plate fixing plates (5), push-pull plates (3), Push-pull groove (6) etc. The push-pull groove (6) is fixed on the upper structure of the shock-isolation layer, and the laminated U-shaped steel plate (1) goes deep into the inside of the push-pull groove, so that the push-pull plate (3) is in the middle of the push-pull groove (6). There is a certain distance between the push-pull plate (3) and the left and right ends of the push-pull groove (6). When the shock-isolation bearing undergoes large deformation, the limiter can limit the deformation of the shock-isolation layer in two directions of push and pull, and play a role in protecting the shock-isolation facilities.

The invention belongs to the field of structural wind engineering and specifically discloses a novel wind tunnel test device for synchronously measuring aeroelasticity-pressure of inertia force. The test device comprises a wind tunnel body for testing a test member, a conduction member for fixing the test member, a stiffness control subsystem for changing stiffness of the test member and a data acquisition subsystem for collecting test data. The novel wind tunnel test device solves the problem that conventional wind tunnel test needs extra tests when considering fluid-solid coupling effect, and realizes test of different stiffness of members on the basis of not replacing the test member, thereby preventing waste of manpower and material resources, improving use efficiency of a wind tunneland reducing test cost.

The invention discloses a wind engineering wake flow calculation method. The wind engineering wake flow calculation method is characterized by comprising the following steps of 1, calculating a wake flow expansion coefficient; 2, on the basis of the step 1, calculating the wind speed of wave flow under a Park model; 3, correcting the radius of the initial wave flow under the Park model; 4, on the basis of the steps 2 and 3, calculating the corrected Park model wave flow wind speed; 5, on the basis of the step 4, building a new wake flow model, and naming the new wake flow model as a Park-Gauss model; 6, calculating the wind speed of wake flow under the Park-Gauss model. The prediction precision of the wake flow is obviously improved through the corrected radius of the initial wake flow, the wind speed of the wake flow area can be well simulated, radial distribution better conforms to a real flow field while the precision is approximately consistent to that of a tested result, and meanwhile the wind engineering wake flow calculation method inherits the advantages of the simple form, easy encoding, efficient calculation and the like of an engineering model.

The invention discloses a three-dimensional wind field high-efficiency simulation method based on delay effect, and belongs to the technical field of structural wind engineering. The main steps of generating the time history of wind speed in the present invention are as follows: determine the coordinates of the simulation point and the initial coordinate system according to the structural drawing, transform the coordinate system so that the Y axis is parallel to the wind speed direction, and obtain the three-dimensional model of N structural simulation points, and All the simulation points of the 3D model are projected onto the target two-dimensional plane, and the simulation points are transformed into projection points in the two-dimensional plane. The wind speed delay time is calculated, that is, the time required for each point to project on the target plane, and the two-dimensional coherence function is used to consider To simulate the horizontal and vertical spatial correlation of different points, use the "harmonic superposition method" to generate fluctuating wind speed, and use the delay time to obtain the time history of wind speed at all points. The statistical characteristics of the data obtained by the time delay method of the present invention are similar to the results of the traditional three-dimensional method, but the simulation efficiency is greatly improved, and the method is simple to operate and has a reasonable theoretical background.

The invention provides a tornado testing device for building wind engineering. The tornado testing device can accurately simulate a wind field of a tornado and the wind load effect of the tornado on a building. The tornado testing device comprises stand columns and a motor, wherein longitudinal beams are arranged on the tops of the stand columns, the longitudinal beams are connected with transverse beams, rolling wheels are arranged on the longitudinal beams and move along the longitudinal beams, the rolling wheels are connected with supporting beams, the supporting beams are connected with a vortex generator, the motor drives driving wheels to rotate, driven wheels matched with the driving wheels are arranged on the supporting beams, a platform is arranged below the vortex generator, and the platform is arranged on a lifting device. According to the tornado testing device for the building wind engineering, the shape of vortex wind generated by the vortex generator is similar to the shape of the tornado, the wind speed and the wind direction of the vortex wind can be adjusted, the vertical distance between the vortex wind and a house model can be adjusted, the horizontal movement speed of the vortex wind can also be adjusted, and therefore the wind field of the tornados in different states and the effect of the wind load of the tornados on the building can be fully simulated.

The invention discloses a wind creation device. The wind creation device comprises more than two electric potential output units, wherein different electric potential output units are arranged at a distance of 3,000-100,000 meters and are in potentials with opposite polarities. The device is mainly used in wind engineering, and is used for increasing precipitation and preventing forest fire.

The invention discloses a target track tracking calculation method of a wind-driven rain amount, and belongs to the technical field of wind engineering. The calculation method comprises the steps of on a given wind field incoming flow condition, solving a Reynolds average N-S equation to obtain a circle flow field of a building; according to an area to be calculated, establishing a virtual plane, and calculating a sample track end point of a sample track on the area to be calculated or the virtual plane; through a surrogate model method, and according to a sample track starting point and the sample track end point, establishing a function relation formula regarding the coordinate relation of a raindrop starting point and end point; given a raindrop track end point coordinate on the area to be calculated, calculating a raindrop track starting point coordinate; solving a raindrop motion equation to obtain an effective track, and according to the effective track, calculating collection rate distribution in the area to be calculated. According to the target track tracking calculation method of the wind-driven rain amount, accurate calculation of collection rates on the back face, lee side, the boundary and the corner point area of the building is achieved, and compared with an existing method, the needed raindrop track calculation amount is remarkably lowered.