Reserch On The Mechanical Behaviour Of Complex Thin-plate Structure Considering Brackets

Thermal power accounts for77.82percent in china’s current electricityproduction. However, it leads to serious environmental contamination because ofthe smoke released in the process of product. With the awareness ofenvironmental protection, the importance of desulfurization and denitration insmoke receive more and more attention. Consequently, safety for constructionsused to desulfurization and denitration in smoke should not be overlooked.In this thesis, according to calculate the whole static of flue, reactor andbrackets using finite element analysis software ANSYS, analyzing the stress andstrain for the whole structure. Because the existing design for this kind ofconstructions does not consider interactions of flue, reactors and brackets. In theprocess of calculating and analysis the writer chooses a proposed constructionwhich was designed by Beijing Guodian for Hua-neng yu-huan power station.The structural strength of flue, reactors and the whole brackets is enough byanalyzing the construction by software. But the deformation distributions ofreactors are various when the writer chooses different kind of analysis. Thedeformation distributions of reactors, analyzed in whole construction, areasymmetric, because of the influence from other parts in the construction;however, distributions from single analysis reactors are symmetric. In addition,the deformation values, from whole analysis, are bigger than those from singleanalysis.The writer finds number of stand points would change the deformation ofone bracket. The major deformations in flue are focus on horizontal segment atthe bottom of flue, vertical section, tilt the upper section of flue, and sub flue.Analyzed R06bracket, one part of flue exit, the load in the middle of the bracketis smaller than that in the stand point extremely. So the writer analyzes theinfluence from number of brackets for the strain and stress in flue exit bydecreased the stand point of R06from three to two. The decreasing of the numberof stand points results in an increase of deformation (1.2mm) which is in themiddle of bracket R06. And there is no change of strain and stress in other parts ofR06. Finally, with the increase of length of cantilevers, in flue entrance, the maxof stress and wall’s deformation enhances linearly. Compared arbitrary directionstress, y-stress is the major stress in calculating. The legth of cantilevers must be less the10meters. Picking up the stress of the fixed end, the stress of the fixed end is nothomogeneous distribution, different to the simple cantilevered plate and beam.