Frequency responses and natural undamped vibrations of light-weight metal guyed masts
S. N. Tsarenkoa, V. V. Gubanovb, I. V. Meginskayab
a Donetsk National Technical University
b Donbas National Academy of Civil Engineering and Architecture
Annotation: The paper deals with the problems of dynamic behaviour of light-weight metal guyed masts. The design of the dynamic technique of the cellular telephone net two-level trihedral guyed mast implemented with a computer has been considered in the paper. The model of the structure has been presented in the form of a vertical cantilever with two elastic supports and lumped mass on the second support. The design technique base is the solution of differential equation of vibration of the systems with distributed parameters. As a result, the guyed mast frequency characteristics have been determined and the analysis of the relative masses of antenna parameters impact on the structure frequency characteristics has been carried out. The natural continuous oscillations of the light metal guyed mast being brought about by the pulsation wind load expressed in form of the sudden load elimination of regular intensity corresponding to the limit deviation of the mast have been considered. The charts of the bending moment variation in different sections of the mast column for the period of the first tone vibrations have been revealed. The effect of the dynamic loads on the stressed and deformed state of the guyed mast column has been estimated. As the result of the received data, recommendations for the equipment placement on the cellular telephone net supports have been provided.
Keywords: light-weight metal guyed masts, pulsation wind loads, systems with distributed parameters, natural undamped vibrations, frequency characteristics calculation.
Pages: 193-200.
Link for citation: Tsarenko, S. N.; Gubanov, V. V.; Meginskaya, I. V. Frequency responses and natural undamped vibrations of light-weight metal guyed masts. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2010. – Vol. 6, N4. – Р. 193-200. – URL: https://donnasa.ru/publish_house/journals/spgs/2010-4/02_carenko_gubanov_mezhinskaya.pdf (date of access: 16.09.2024). (in Russian)
Vol. 6, N4 (2010)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture