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A numerical simulation method of wind effect on building roof cornice

A numerical simulation and cornice technology, applied in the field of numerical simulation of wind effects, can solve problems such as large amount of calculation, and achieve the effect of broad application prospects

Pending Publication Date: 2019-03-29
许江锋 +2
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Problems solved by technology

However, in the current numerical simulation, the turbulence model needs to be improved to make it more mature to solve the problem of the flow around the ton body in the structural wind engineering, and the numerical simulation accuracy of the wind-loaded pulsation effect needs to be improved to simulate the turbulent flow conditions more realistically. In addition, the calculation of numerical simulation is usually very large, and it is necessary to further optimize the method of numerical simulation to reduce the requirements on the computer CPU

Method used

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  • A numerical simulation method of wind effect on building roof cornice
  • A numerical simulation method of wind effect on building roof cornice
  • A numerical simulation method of wind effect on building roof cornice

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Embodiment Construction

[0026] see figure 1 , a method for numerical simulation of wind effects on building roof cornices, including:

[0027] Step 1: Establish a calculation model. The building located in the atmospheric boundary layer is in a completely open flow wind field. The influence of wind on the building has a certain range. For the convenience of calculation, a limited three-dimensional Calculation area, when determining the calculation domain, ensure that the calculation domain is sufficiently large, and at the same time ensure that there is a sufficient distance between the boundary and the model, and at the same time consider that the number of grids increases with the increase of the calculation domain, and the amount of calculation increases. Therefore, The requirement of the numerical wind tunnel for the blocking degree is expressed as: (maximum windward area of ​​the roof cornice / cross-sectional area of ​​the drainage basin)*100%<3% in the case of the building roof cornice.

[0028...

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Abstract

The invention provides a numerical simulation method of wind effect on building roof cornice, which comprises the following steps: firstly, establishing a calculation model, giving a finite three-dimensional calculation area in the numerical simulation, and determining a calculation basin; 2, carrying out mesh division and setting boundary condition; 3, solving that problem, wherein a 3D single-precision solver is adopted as the pressure-based implicit formula; 4, numerically simulating that wind effect of the roof structure with cornice due to the increase of the internal pressure caused by the open or sudden opening of part of the door and windows of the building correspond to the vertical line position of the cornice of the roof of the building, transferring The simulation position to the building door and window corresponding to the eaves perpendicular position of the building roof, and establishing the internal pressure transfer equatio. Simulating The power spectrum of fluctuating wind speed by The Schinozuka-Deodatis method, and deducing the internal pressure transfer equation of open-hole structure. The results of wind tunnel test and simulation are in good agreement. Numerical simulation can simulate the real wind environment and provide reference for the wind-resistant design of roof cornice.

Description

technical field [0001] The invention relates to the field of wind effect numerical simulation, in particular to a wind effect numerical simulation method for building roof cornices. Background technique [0002] With the development of social economy and the advancement of science and technology, a large number of space structures with unique shapes and novel structures have emerged. Roof structures with cornices are widely used in various large public buildings because of their beautiful shape and good performance. Because most of these buildings have the characteristics of light weight, high flexibility, and low resistance, they are sensitive to wind loads, and wind loads often become the main control loads in their structural design. In addition, due to the opening or sudden opening of some doors and windows in buildings The increase of internal pressure has a greater impact on the safety of roof structures with cornices. A large number of wind disaster investigations hav...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T17/00
CPCG06T17/00G06F30/13
Inventor 许江锋马旭东尹永新
Owner 许江锋
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