Wind-induced Vibration Responses And Wind Vibration Factor Of750kV Overlong Substation Steel Lattice Frame

AS the rapid development of electric power construction, wind-induced vibrationresponses and wind vibration factor of substation steel lattice frame which has becomethe concern of the majority of scholars. The research object is750kV overlongsubstation steel lattice frame in my paper, it has the characteristics which is the heightof the great, the load heavy, the natural frequency of vibration of low.It iswind-sensitive and the wind load governs structure design.In this paper, based on the structure of Weinan East750kV ove rlongsubstation steel lattice frames, based on random vibration theory，a wind powerspectral analysis method in the frequency domain was used to analyze the windinduced vibration of overlong substation steel lattice frame in the ANSYS inthis paper. some parameters which influence the wind-induced dynamicresponse of750kV overlong substation steel lattice frames, are analyzed andthen selected, such as mean high order mode shapes，wind directions，the basicwind pressure, damping ratio, terrain roughness coefficient, level and verticalfluctuating wind power spectrum. Above different parameters, thedistribution characteristics of mean nodal displacement and RMS displacement aredetailedly studyed. Meanwhile, gust displacement factor at key nodes fordifferent parameters were also calculated and compared. Finally it is comparedand analyzed with wind vibration response of the traditional three spanssubstation structure. The program that the temperature sewingthe of the steelstructure is canceled is demonstrated, and it is rational and feasible.According to result of the parametric calculation and analysis, somecharacteristics of wind-induced dynamic responses of750kV overlong substation steel lattice frames and the proposed method and analysis results can providereference for the design of large substation frame structures.