scholarly journals REFLECTOR WIND LOAD CHARACTERISTICS OF THE LARGE ALL-MOVABLE ANTENNA AND ITS EFFECT ON REFLECTOR SURFACE PRECISION

2017 ◽  
pp. 1-29
Author(s):  
Yan Liu ◽  
◽  
Hong-liang Qian ◽  
Feng Fan ◽  
◽  
...  
Keyword(s):  
Wind Load ◽  
Reflector Surface ◽  
Load Characteristics ◽  
Surface Precision

scholarly journals Research on wind load characteristics of conductors in transmission lines of Gansu power grids

2018 ◽  
Vol 199 ◽  
pp. 052047
Author(s):  
Shang Yadong ◽  
Li Peng ◽  
Su Junhu ◽  
Bao Chengjia ◽  
Wang Feixing ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Wind Load ◽  
Power Grids ◽  
Load Characteristics

Preliminary Research on Connecting Strategy between Back-Up Structure and Alidade for 110-m QitTai Radio Telescope

2015 ◽  
Vol 741 ◽  
pp. 61-65
Author(s):  
Qian Xu ◽  
Lin Li ◽  
An Yu Cheng
Keyword(s):  
Radio Telescope ◽  
Surface Deformation ◽  
Cone Angle ◽  
Antenna Structure ◽  
Space Truss ◽  
Reflector Surface ◽  
Main Reflector ◽  
Space Truss Structure ◽  
Surface Precision ◽  
Better Than

The QTT (QiTai 110m radio telescope) antenna, with large aperture and high main-reflector surface precision, whose connecting strategy between back-up structure and alidade was investigated. In order to make the reflector surface deformation coordinated, the connecting strategies of “umbrella supporting”, “space truss” and “double gear” structure were constructed and analyzed based on FEM (finite element method). The results show that “double gear supporting” is superior to “space truss structure”, and the latter is better than “umbrella supporting”, while in the “umbrella supporting structure”, the smaller cone angle is good for reflector deformation coordination. These structures are easy to achieve antenna structure “homology” design.

Surface pressure and wind load characteristics on prisms immersed in a simulated transient gust front flow field

2010 ◽  
Vol 98 (6-7) ◽  
pp. 299-316 ◽  
Author(s):  
Kyle Butler ◽  
Shuyang Cao ◽  
Ahsan Kareem ◽  
Yukio Tamura ◽  
Shigehira Ozono
Keyword(s):  
Flow Field ◽  
Surface Pressure ◽  
Wind Load ◽  
Load Characteristics ◽  
Gust Front

Wind Load Characteristics of a Long-Span Retractable Roof Structure

2014 ◽  
Vol 525 ◽  
pp. 397-402
Author(s):  
Jian Guo Zhang ◽  
Hui Min Zhuang
Keyword(s):  
Wind Direction ◽  
Small Area ◽  
Wind Tunnel Test ◽  
Wind Load ◽  
Coastal City ◽  
Long Span ◽  
Roof Structure ◽  
Rigid Model ◽  
Load Characteristics ◽  
Fluctuating Wind

Taking a long-span retractable roof structure, which locates in a coastal city of China, as an example, a wind tunnel test on a rigid model was carried out. This paper analyzes the wind load characteristics of this structure under three conditions: open, closed and closed with damage in small area of windows. The block shape coefficients as well as its variation with wind direction are given; meanwhile, this paper analyzes the fluctuation characteristics of wind load, obtaining the gust coefficient as well as the variation of fluctuation coefficients with wind direction, which can be applied to the design of coating members in this structure. By comparing the analysis results under three conditions, the following conclusion can be reached: the long-span structure is more resistant against mean wind load when the roof is open than when it is closed. There is no decrease in fluctuating wind load and in some wind directions; the fluctuating wind load will be even larger. Additionally, the damage in small area of windows does not much affect the wind load characteristics on structure.

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