Seismic response of rotating machines-structure-RFBI systems

✍ Scribed by Su, Wen-Chyi; Hernried, Alan G.; Yim, Solomon C. S.

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 307 KB
• Volume: 29
• Category: Article
• ISSN: 0098-8847
• DOI: 10.1002/(sici)1096-9845(200002)29:2<213::aid-eqe900>3.0.co;2-4

✦ Synopsis

The seismic response of a critical rotating machine either rigidly attached to a #oor or independently isolated housed within an initially aseismically designed or uncontrolled structure are investigated. A particular isolation system, the Resilient-Friction Base Isolator (RFBI), is employed. Finite element formulations of a rotor-disk-bearing model on a rigid base are developed. The equations of motion for the combined rotating machine}structure}RFBI systems are presented. Parametric studies are performed to investigate the e!ects of variations in system physical properties including friction coe$cient, mass ratio, shaft #exibility, bearing rigidity, bearing damping and speed of rotation on the response of rotating machines for the combined rotating machine}structure}isolator systems. Comparative studies in the peak response of the rotating machine supported on various isolation systems and the corresponding "xed base system are carried out. The study indicates that the Resilient-Friction Base Isolator can signi"cantly reduce the seismic response of rotating components to potentially damaging ground excitations.