Study On The Stability And Seismic Performance About Supporting Structure Of Steel Bracket Of Dust Precipitator

Because of the strict request to environmental protection, there are high requirements todust clean of flue gases. Dust precipitator is indispensable to electric power plants. As animportant supporting structure of electric power plant equipment, steel bracket of dustprecipitator will be more widely used, so study on the static and dynamic performances hassignificant meaning to project. So far, the studies mainly on optimize and analyze of members,there are few researches on the whole performance of steel bracket, the static and dynamicperformances are studied and the stability is analyzed through FEM in the paper.Steel bracket is one of the dual systems resisting lateral forces. On the basis of existingreaearch results, ANSYS software was used in the paper to establish the three-dimendionalmodel of the steel bracket structure. The paper considered invariable loads, live loads, windloads and so on, calculation of static operating modes were carried out on the whole structure,and contrasted the results of different operating modes, then got the structural performance andthe adverse operating mode. The static results indicate that the whole structure work in elastic,and all of the reactions are meet the desigh requests, the results will provide references for theactural design.There is not sufficiently effective design and analysis method for the overall stability ofsteel bracket structure, mostly replaced by calculating the stability of poles. The poles stabilityunder vertical loads was studied in the paper, and effective length factor was used to get thebuckling load of steel bracket poles. The paper also used FEM to analyze the stability of wholestructure, which considered the nonlinear effects. The whole stability of the steel bracket of dustprecipitator is analyzed by eigenvalue buckling and nonlinear buckling analysis method inANSYS, so as to get the buckling load.Inadequately designed steel frame structure may suffer extensive damage under strongearthquake, so it is necessary to carry out seismic time-history analysis to steel bracket of dustprecipitator. In the paper, natural vibration and time-history response analysis under strongearthquake were carried out. Subspace method in ANSYS software was used to analyze naturalvibration characteristics of the bracket structure, and got the period of natural vibration andvibration modes, which is useful to understand the vibration characteristics in actural situation.When analyzing seismic time-history response of the structure, an actural earthquake wave was used to analyze elastic time-history response of the whole structure, while the direction of theearthquake wave input to the structure was considered, the seismic response of the steel bracketand the influence of different input direction to anti-seismic performance were analyzed.Through time-history analysis, it is known that the X direction is weak to structure. Theearthquake wave input in the weak direction is adverse to structure, on the whole, the steelbracket structure has a good anti-seismic performance and the structure is safe under strongearthquake.