Steady Wind Load on External Surface and Its Effect on Wind‐Induced Response for a 200 m High Natural‐Draught Cooling Tower

Zou, Yunfeng; Xue, Fanrong; He, Xuhui; Cai, Chenzhi; Li, Shouke

doi:10.1155/2021/9969671

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…In terms of structures, Castellani et al [18], Chizfahm et al [19], and Li et al [20] conducted numerical simulation studies on a horizontal axis micro wind turbine, a bladeless wind turbine, and a wind turbine with a damper, respectively. Belver et al [21] conducted wind vibration simulation studies on a 183 m industrial chimney, Wang et al [22] on a high-rise thin-walled tower, and Zou et al [23] on a very large natural ventilation cooling tower. In practical engineering, numerical simulation techniques have been applied to various types of structures.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study of Vibration Characteristics of Cantilever Traffic Signal Support Structure under Wind Environment

Zhang¹,

Zhou²,

Zhao³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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Computational fluid dynamics (CFD) and the finite element method (FEM) are used to investigate the wind-driven dynamic response of cantilever traffic signal support structures as a whole. By building a finite element model with the same scale as the actual structure and performing modal analysis, a preliminary understanding of the dynamic properties of the structure is obtained. Based on the two-way fluid-structure coupling calculation method, the wind vibration response of the structure under different incoming flow conditions is calculated, and the vibration characteristics of the structure are analyzed through the displacement time course data of the structure in the crosswind direction and along-wind direction. The results show that the maximum response of the structure increases gradually with the increase of wind speed under 90°wind direction angle, showing a vibration dispersion state, and the vibration response characteristics are following the vibration phenomenon of galloping; under 270°wind direction angle, the maximum displacement response of the structure occurs at the lower wind speed of 5 and 6 m/s, and the vibration generated by the structure is vortex vibration at this time; the displacement response of the structure in along-wind direction increases with the increase of wind speed. The along-wind displacement response of the structure will increase with increasing wind speed, and the effective wind area and shape characteristics of the structure will also affect the vibration response of the structure.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study of Vibration Characteristics of Cantilever Traffic Signal Support Structure under Wind Environment

Zhang¹,

Zhou²,

Zhao³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

View full text Add to dashboard Cite

show abstract

“…Wind load is one of the main loads to be controlled when designing engineering structures; many scholars have studied the characteristics of wind load under different working conditions [4][5][6][7][8][9][10][11][12], including studies on the influence of mountain topography, height and distance on wind load [13][14][15][16][17][18]. The shape factor of wind load is an indispensable parameter when calculating wind load, and it can be obtained by three methods: field tests [19][20][21][22], wind tunnel tests [23][24][25][26] and numerical simulations [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Mountain Height and Distance on Shape Factor of Wind Load of Plastic Tunnel

Xu,

Ren,

et al. 2023

Applied Sciences

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Due to their soft structure and covering material, plastic greenhouses are vulnerable to wind disasters, causing large-scale damage and huge economic losses. The wind load of greenhouses depends on the surface wind pressure distribution, which is different for greenhouses located in valleys from those in plain areas. To study the wind pressure distribution law for various regions of greenhouses built in valleys, mountain and greenhouse models have been built by Computational Fluid Dynamics, in which the length direction of the greenhouse is perpendicular to the valley and the wind direction is parallel to the valley. In the analysis, the verified turbulence model and grid division method are both introduced, and the effect of the height and distance of mountains is considered. According to the distribution law of wind pressure, the greenhouse’s surface is partitioned, and the variation law of the shape factor of wind load on a plastic tunnel is analyzed. Then, the calculation model for the shape factor of the wind load on the greenhouse located in a valley is proposed. The conclusions show that: (a) When the wind inflow direction angle is parallel to the valley, the distribution pattern of wind pressure on the surface of the greenhouse is similar to that on the plain regardless of the distance and height of the mountains, while the values of the wind pressure are greatly affected by the mountain height and distance. The distance between mountains has greater influence than the effect of mountain height. (b) The shape factor of wind load on the suction area of the greenhouse decreases as the distance of mountains increases, while the shape factor on the pressure area of the greenhouse increases with the increase in the distance. It can be seen that the valley effect is non-negligible. The narrower and deeper the valley, the greater the wind pressure effect. (c) When the ratio of the distance between the foot of the mountain and the greenhouse d to the height of the mountain H is less than 5, i.e., d/H < 5, the ratio of the distance to the height has a significant impact on the shape factor of wind load on the greenhouse. When d/H is close to 10, the shape factor of the wind load in the valley area is close to that in the plain area, and the effect of the ratio between the height and the distance is negligible. (d) The proposed calculation model can be used to calculate the effect of mountain height and distance on the shape factor of wind load. The research results can be used in the wind resistance design of plastic greenhouses in valley areas, and can also provide some data support for the revision of the greenhouse structural load code.

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Steady Wind Load on External Surface and Its Effect on Wind‐Induced Response for a 200 m High Natural‐Draught Cooling Tower

Cited by 2 publications

References 17 publications

Numerical Simulation Study of Vibration Characteristics of Cantilever Traffic Signal Support Structure under Wind Environment

Numerical Simulation Study of Vibration Characteristics of Cantilever Traffic Signal Support Structure under Wind Environment

The Influence of Mountain Height and Distance on Shape Factor of Wind Load of Plastic Tunnel

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