Time-domain analysis of wind-induced response of dish solar thermal power generation system rack structure

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (7) : 177-185.

YAN Jian，PENG You-duo，YI Cheng-fei

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Abstract

According to the wind-induced vibration problems of a large dish rack thermal systems running wind，taking the develop 25KW disk rack as the research object，elaborated the finite element modeling method of complex frame structure，and through the analysis of static load and transmission angle，pointed out the elevation angle driving mechanism deficiencies and to be improved，then comparative analysis of the vibration characteristics of multi-rack elevation angle of the frame before and after improvement. Based on the linear filtering method of AR scored 25 groups of conditions of fluctuating wind load (average wind speed 16.0 m/s)，carry out the wind vibration time domain solution improved frame. Analysis of the frame of key nodes displacement response characteristics of root mean square and peak distribution，and analyzes the frame of typical working condition of displacement response spectrum analyses，given the displacement wind vibration coefficient of various operating conditions of each rack key nodes, to provide the reference for wind fram structure design. The results show that the displacement response of frame structure in the forced vibration of pulsating load mainly，accompanied by multi-stage resonant response modal participation. The peak displacement and root-mean-square distribution of the rack control point is similar，and along the focal axis response components are dominant，the vibration of frame mainly for the frame depending on the day part revolve around elevation angle axis.

Key words

dish solar thermal power generation / frame structure / fluctuating wind field simulation / wind-induced vibration response / time domain analysis / transmission angle of frame

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YAN Jian，PENG You-duo，YI Cheng-fei. Time-domain analysis of wind-induced response of dish solar thermal power generation system rack structure[J]. Journal of Vibration and Shock, 2016, 35(7): 177-185

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