Model Reduction Methods for Rotor Dynamic Analysis: A Survey and Review

Table 2

The four stiffness and damping coefficients for the two groove axial bearing.

Speed	Kxx	Kxy	Kyx	Kyy
(rpm)	(N/m)	(N/m)	(N/m)	(N/m)
1500	1.797𝐸+08	2.285𝐸+07	−3.739𝐸+08	3.852𝐸+08
2500	1.617𝐸+08	2.229𝐸+07	−3.399𝐸+08	3.510𝐸+08
3500	1.811𝐸+08	6.243𝐸+07	−3.563𝐸+08	3.101𝐸+08
4500	1.754𝐸+08	6.586𝐸+07	−3.532𝐸+08	3.071𝐸+08
5500	1.716𝐸+08	7.013𝐸+07	−3.540𝐸+08	3.065𝐸+08
Speed	Cxx	Cxy	Cyx	Cyy
(rpm)	(N⋅s /m)	(N⋅s /m)	(N⋅s/m)	(N⋅s /m)
1500	1180944	−1401501	−1401495	4438158
2500	616542	−613831	−613828	2370313
3500	621110	−549773	−549771	1819237
4500	471272	−382427	−382425	1409636
5500	383978	−288807	−288805	1163103