Advanced Steel Construction

Vol. 13, No. 1, pp. 1-29 (2017)


REFLECTOR WIND LOAD CHARACTERISTICS OF

THE LARGE ALL-MOVABLE ANTENNA AND

ITS EFFECT ON REFLECTOR SURFACE PRECISION

 

Yan Liu*,1, Hong-liang Qian2 and Feng Fan2

1 School of Civil Engineering, Chang’an University, Xi’an 710061, P.R.China  

2 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, P.R.China

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 23 August 2015; Revised: 19 January 2016; Accepted: 20 February 2016

 

DOI:10.18057/IJASC.2017.13.1.1

 

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ABSTRACT

The wind load could cause the deformation of the reflector surface, seriously affect the resolution and the sensitivity of the antenna and degrade its performance. So the analysis of the wind characteristics of the reflector surface is particularly important. For one thing, the wind loads acting on an open parabolic reflector, as a commonly used type of reflector (F/D=0.3), are obtained by the wind tunnel test and CFD technique and wind characters of the parabolic reflector are revealed. Wind-induced dynamic behaviors under different upwind profiles are also analyzed by the finite element method (FEM). After that based on the numerical simulation, a large number of different kinds of reflectors are researched and analyzed and the results for different diameters, focal length to diameter ratios are acquired to provide sufficient information for wind force proofing design of the antenna structures. Finally, taking the established 110m antenna structure as the example and based on the instantaneous pressures derived from the wind tunnel tests, the mechanic performances of the structure at the survival wind speed and working speed are respectively investigated, and consequently the reliability of its mechanic performance is evaluated. The surface RMS of structural responses under various wind loads conditions and internal mechanisms are finally discussed to provide valuable data for the deformation control of the actuators in further work.

 

KEYWORDS

Antenna structure, Wind tunnel test, Numerical simulation, Wind-induced vibration response, Wind force proofing design.


REFERENCES

[1]       Marco, Quattri,, “Proceedings of the International Society for Optical Engineering”, Boston University Press, Boston, 2002, pp. 459-470.

[2]       Hiriart, D., Ochoa, J.L. and Garcia, B., “Wind Power Spectrum Measured at the San pedro Martir Sierra”, Revista Mexicana de Astronomia Astrofisica, 2001, Vol. 37, pp. 213-220.

[3]       Solari, G. and Piccardo, G., “Probabilistic 3-D Turbulence Modeling for Gust Buffeting of Structures”, Probabilistic Engineering Mechanics, 2001, Vol. 16, pp. 73-86.

[4]       Jia, Y.Q., Sill, B.L. and Reinhold, T.A., “Effects of Surface Roughness Element Spacing on Boundary Layer Velocity Profile Parameters”, Wind Eng. Ind. Aerodyn, 1998, Vol. 73, pp. 215-230.

[5]       Irwin, H.P.A.H., “The Design of Spires for Wind Simulation”, Wind Eng. Ind. Aerodyn, 1981, Vol. 8, pp. 361-366.

[6]       Balendra, T., Shah, D.A. and Tey, K.L., “Evaluation of Flow Characteristics in the NUS-HDB Wind Tunnel”, Wind Eng. Ind. Aerodyn, 2002, Vol. 90, pp. 675-688.

[7]       Meroney, Letchford and Sarkar., “Comparison of Numerical and Wind Tunnel Simulation of Wind Loads on Smooth and Dual Domes Immersed in a boundary Layer”, International Journal of Wind and Structures, 2002, Vol. 5, pp. 347-358.

[8]       Uematsu, Y. and Tsuruishi, R., “Wind Load Evaluation System for the Design of Roof Cladding of Spherical Domes”, Journal of Wind Engineering and Industrial Aerodynamics, 2008, Vol. 96, pp. 2054-2066.

[9]       Sterling, M., Baker, C.J. and Quinn, A.D., “Pressure and Velocity Fluctuations in the Atmospheric Boundary Layer”, Wind and Structures, 2005, Vol. 8, No. 1, pp. 13-34.

[10]     Kho, S., Baker, C. and Hoxey, R., “The 5th Asia-Pacific Conference on Wind Engineering”, Tokyo University Press, Tokyo, 2001, pp. 509-512.

[11]     Chen, Y., Kopp, G.A. and Surry, D., “Prediction of Pressure Coefficients on Roofs of Low Buildings Using Artificial Neural Networks”, Wind Eng. Ind. Aerodyn, 2003, Vol. 91, pp. 423-441.

[12]     Launder, B.E. and Spalding, D.B., “The Numerical Computation of Turbulent Flows”, Comp. Math. Appl. Mech, 1974, Vol. 3, pp. 35-61.

[13]     Canuto, C. Hussaini, M.Y. and Quarterini, A., “Spectral Methods in Fluid Dynamics”, Springer-Verlag, 1987, Vol. 12, No. 4, pp. 1473-1490.

[14]     Murakami, S. and Mochida, A., “Development of a New Model for Flow and Pressure Fields Around Bluff Body”, Journal of Wind Engineering and Industrial Aerodynamics, 1997, Vol. 68, pp. 169-182.

[15]     Lin, B., “Application of CFD Simulation Technology in the Large Complicated Structure Engineering”, Harbin Institute of Technology, Harbin, 2005, pp. 1-10.

[16]     Kato, M. and Launder, B.E., “The 9th Sym. on Turbulent Shear Flow”, Tokyo University Press, Tokyo, 1993, pp. 4-16.

[17]     Bremer, M. and Penalver, J., “The 6th FE Model Based Interpretation of Telescope Temperature Variations”, Bonn, Bonn University Press, 2002, pp. 186-195.

[18]     Bremer, M. and Greve, A., “Front and Rear Perspective Heated Prototype Panels for the IRAM 15–m Telescopes in 28th ESA Antenna Workshop on Space Antenna Systems and Technologies”, Netherlands Technology Press, Noordwijk, 2005, pp. 943-960.

[19]     Chamberlin, R.A., “Temperature Meaurements on the Leighton Telescope”, Surface Memo, 2003, Vol.5, pp. 124-130.