Jang, E. Muszynska, A. Ph.D., Park, Y.-P. Ph.D., Kim, C.-H. Ph.D., 2024-01-21T20:14:29Z 2024-01-21T20:14:29Z 2021-09-02 1996-01 1023-621X https://pubs.kist.re.kr/handle/201004/144872 The paper presents the dynamic analysis of an anisotropic rotor system with fluid interaction by using modal nonsynchronous perturbation testing and dynamic stiffness approaches. The anisotropic rotor system produces more complex rotor behavior than an isotropic system. In particular, the existence of the quadrature resonance phenomenon for backward precession is demonstrated. A symmetric rotor supported anisotropically by one fluid lubricated bearing and one rolling element bearing simulates rotating machinery behavior. A dynamic stiffness anisotropy algorithm which includes fluid terms is used to process experimental data in order to identify lightly loaded journal fluid film force parameters. The existence of the quadrature resonance for backward precession obtained from the experiment is compared with the analytical model. The results from modeling show strong agreement with experimental results. ？ 1996, OPA (Overseas Publishers Association). English Identification of the Quadrature Resonances Using Modal Nonsynchronous Perturbation Testing and Dynamic Stiffness Approach for an Anisotropic Rotor System with Fluid Interaction Article 10.1155/S1023621X96000061 1 International Journal of Rotating Machinery, v.2, no.3, pp.187 - 199 International Journal of Rotating Machinery 2 3 187 199 scopus 2-s2.0-53349160568 Article Anisotropy dynamic stiffness anisotropy algorithm fluid interaction modal nonsynchronous perturbation quadrature resonance phenomenon