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Wind barrier pneumatic optimization method based on Kriging improved model

An optimization method, a technology for improving models, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as time-consuming and cost

Inactive Publication Date: 2019-08-20
HOHAI UNIV
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Problems solved by technology

However, traditional parameter analysis methods were often used in previous studies, which required a large number of fluid calculation software or wind tunnel tests, which required a lot of time and cost.

Method used

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  • Wind barrier pneumatic optimization method based on Kriging improved model
  • Wind barrier pneumatic optimization method based on Kriging improved model
  • Wind barrier pneumatic optimization method based on Kriging improved model

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specific Embodiment

[0140] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention but not to limit the scope of the present invention.

[0141] In order to minimize the effect of the airflow on the stockpile, the peak wind speed ratio R around the stockpile u The minimum sum is the optimization objective, and the windscreen height x 1 and porosity x 2 Optimizing the design variables for optimization, the corresponding optimization model expression is:

[0142] min y=∑R u

[0143]

[0144] Among them, y is the objective function, R u is the peak wind speed ratio, x 1 、x 2 are the height and porosity of the windscreen, respectively, and h is the height of the pile.

[0145]

[0146] In the formula: u is the average wind speed, ε is the fluctuating wind speed in the downstream direction, ε=u·I u , I u ...

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Abstract

The invention discloses a windproof grid pneumatic optimization method based on Kriging improved model, which takes the height and the void ratio of a windproof grid as optimization variables, and obtains the height and the void ratio values of the windproof grid with the optimal windproof effect through optimization. According to the method, the influence of the height and porosity of the windproof fence is considered, and multivariable optimization design is carried out; the updating of the Kriging agent model is improved by adopting a multi-point point adding criterion, so that the convergence speed of the wind barrier optimization design is increased. The method is simple and effective, and compared with a traditional optimization algorithm (such as a genetic algorithm), optimization time can be saved to a great extent, and an optimal solution can be obtained accurately and quickly.

Description

technical field [0001] The invention relates to an aerodynamic optimization method of a windbreak grille based on an improved Kriging model. Background technique [0002] The wind screen is widely used in protection engineering. It is a wind screen with a certain height composed of baffles with a certain shape, openings in the entire area, and a small thickness. The windscreen is a porous structure, because of its special hole structure, it can divide the wind in the turbulent state of the incoming flow into multiple airflows with different angles and make them interfere with each other, forming a wind speed reduction area on the leeward side, reducing the incoming wind speed, and changing the wind flow. Wind turbulence strength and weaken the vortex structure in atmospheric turbulence, so it can play two major roles of windproof and dustproof. [0003] Previous studies have shown that the height of the windscreen grille and the porosity ratio have a great influence on its ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367G06F30/20
Inventor 伞冰冰赵友毅徐晨邱冶
Owner HOHAI UNIV
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