大间隙环流中复杂轴承_转子系统振动特性研究.pdfVIP

2006 12 D ec12006 12 ( 184 ) LUBR ICAT ION ENG INEER ING N o1 12 ( serial N o1 184 ) -* ( 730070) : M yk lestad-, - , -: - - , : : TH 1131 1 : A : 0254 - 0150 ( 200 6) 12- 030 - 3 The Complex V ibrations of Hydrodynam ic Bearing-rotor in Large Gap Annular Flow S un Q iguo ( Institute of System A na lysis Integration, L anzhou J iaotong U n iversity, Lanzhou G ansu 730070, Ch ina) Abstract Th e sy stem motion equations of hydrodynam ic bearing- rotor in large gap annu lar flow w ere derived by M yk les- tad m ethod, an iterative procedure w as p roposed to f ind th e static equ ilib rium posit ions of the bearing-rotor sy stem, and the comp lex v ibrations of the sy stem w ere stud ied us ing num ericalm ethod. Num erical resu lts show that th e flu id-structure cou- p ling effects of the large gap annu lar flow m ake th e natural frequ ency, critical speed and stab ility o f bearing-rotor sy stem change in various degrees, and th ere ex ists dynam ic coup ling and static coup ling in th e sy stem. K eywords large gap annu lar flow hyd rodyn am ic bearing rotordynam ics num erical m ethod [ 1- 3] M yk lestad , , [ 4] , , 1 [ 4] - -, , -, , ,