서지주요정보
축-베어링 시스템의 비선형 진동 해석 및 안정성 향상 방법에 관한 연구 = A study on nonlinear vibration analysis and improving method of stability characteristics of a rotor-bearing system
서명 / 저자 축-베어링 시스템의 비선형 진동 해석 및 안정성 향상 방법에 관한 연구 = A study on nonlinear vibration analysis and improving method of stability characteristics of a rotor-bearing system / 노병후.
발행사항 [대전 : 한국과학기술원, 2001].
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등록번호

8012513

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 01051

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리뷰정보

초록정보

In this thesis, the nonlinear vibration characteristics of a rotor-bearing system supported by the fluid film journal bearing are analyzed numerically when the external sinusoidal disturbances are given to the bearing continuously. Also, the cavitation algorithm implementing the Jakobsson-Floberg-Olsson boundary condition is adopted to predict cavitation regions in the fluid film more accurately than a conventional Reynolds boundary condition. And the stability characteristics of a rotor-bearing system supported by the actively controlled fluid film journal bearing are numerically investigated. Proportional control, derivative control, integral control, proportional-derivative control and synchronous control are used for the control algorithm of the fluid film journal bearing. When the external disturbances are applied to the bearing, the range of the full film region varies with periodic at steady state response, and it becomes smaller than its range of the static equilibrium state. The difference between the linear and the nonlinear analysis dependents upon the excitation frequency of the external disturbance, and it becomes much more remarkable as the vibration amplitude or the frequency of the external disturbance increases. It is also shown that the whirl instability of a rotor-bearing system can be suppressed effectively by actively controlled fluid film journal bearing. In the case of proportional control and derivative control, the stability threshold speed of a rotor-bearing system is increased with control gain. And the control of the coupled control gain is more effective than the control of the uncoupled control gain for the stability improvement of a rotor-bearing system. In summary, the nonlinear vibration characteristics of a rotor-bearing system supported by the fluid film journal bearing are summarized, and the active control of the fluid film journal bearing can be adopted for the stability improvement of a rotor-bearing system.

서지기타정보

서지기타정보
청구기호 {DME 01051
형태사항 xiv, 158 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, 유니버설 레이놀즈 방정식의 개념 및 Elrod 알고리즘. - B, 축의 불균형 질량에 의한 불균형 응답
저자명의 영문표기 : Byoung-Hoo Rho
지도교수의 한글표기 : 김경웅
지도교수의 영문표기 : Kyung-Woong Kim
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 143-146
주제 진동
안정성
베어링
능동제어
비선형해석
vibration
stability
bearing
active control
nonlinear analysis
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