Statistical Energy Analysis on Vibration Characteristics of Cantilever Plate with Air Film Damper
In view of the structural design of Air Film Damping(AFD)in aeroengine fan blades,the vibration characteristics of AFD system are analyzed in depth by Statistical Energy Analysis(SEA),the impedance transfer model of cantilever plate with AFD is thus established.Based on the multiphysics coupling mechanism,the fluid flow in the air film is equivalent to non-com-pressible flow as well as compressible flow,respectively,the damping ratio of AFD system is thereby derived,and the vibration characteristics of the AFD system are studied.Results show that the AFD system can effectively suppress vibration effect on cantile-ver plate;there is a critical frequency for the AFD system,below which,the results of the uncompressible flow model and the com-pressible flow model are identical,while above the critical frequency,the compressible flow model can calculate the damping ra-tio of the AFD system more precisely since it is more consistent with the pumping effect of the actual flow in the air film.
Air Film Damper(AFD)Cantilever PlateVibration CharacteristicsStatistical Energy Analysis
王小峰、崔东泽、张鸿、唐云冰
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中国民航大学中欧航空工程师学院,天津 300300
Laboratoire de Tribologie et Dynamique des Systèmes,École Centrale de Lyon,Écully,69134,France
Groupe d'Acoustique de l'Université de Sherbrooke,Université de Sherbrooke,Québec, 63865,Canada
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万方数据
维普
