Open AccessDynamic Analysis of 110 kv Double-circuit Compound High-strength Hollow Mezzanine Concrete-filled Steel Tube Pole
Author(s) -
Xingeng Li,
Guo Dingzhou,
Fu Bichuan,
Hongjun Liu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/621/1/012040
Subject(s) - galerkin method , nonlinear system , hamilton's principle , vibration , stability (learning theory) , structural engineering , partial differential equation , differential equation , equations of motion , control theory (sociology) , tower , ordinary differential equation , discretization , physics , mathematical analysis , mathematics , engineering , classical mechanics , computer science , acoustics , control (management) , quantum mechanics , machine learning , artificial intelligence
Combined with the simplified mechanical model of the pole-line system, the dynamic stability of 110kV hollow mezzanine concrete pole is analyzed and its dynamic equation is established. The main resonance mode in the plane is analyzed by the approximate analytical method, and the stability is determined and solved by the stability theory. The characteristics of wind-induced vibration are revealed from the perspective of nonlinear dynamics. Based on Hamilton principle, the partial differential equation of motion of the simplified dynamic analysis model of the tower column is established, and it is discretized into ordinary differential equation by Galerkin method. Finally, the critical frequency equation is established according to the method proposed by Bolotin, so as to obtain the dynamic stability region and instability region of the tower column. Based on the B-R motion criterion, the nonlinear dynamic stability of the pole-line system is studied, and the initial pretension, wind direction angle and span of the cable are selected for parameter analysis. The influence of these parameters on the nonlinear dynamic stability critical load of the hollow mezzanine concrete pole line system is investigated.