Influence of bearing number on high speed air rotor bearing systems
| Autor: | Kuo-Nan Yu, Chin-Tsung Hsieh, Ming-Jyi Jang, Cheng-Chi Wang, Her-Terng Yau |
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| Rok vydání: | 2016 |
| Předmět: |
Engineering
Bearing (mechanical) business.industry Rotor (electric) Instrumentation 020208 electrical & electronic engineering Finite difference method 02 engineering and technology Aerodynamics 01 natural sciences law.invention Power (physics) law Control theory 0103 physical sciences 0202 electrical engineering electronic engineering information engineering business 010301 acoustics Bifurcation Numerical stability |
| Zdroj: | INDIN |
| DOI: | 10.1109/indin.2016.7819359 |
| Popis: | High Speed Air Rotor-Bearing (HSAR) systems have been extensively applied for a variety of mechanical engineering parts, and potential for use in high-rotational speed, high-precision and high stiffness instrumentation. The current study presents a detailed theoretical analysis of bearing performance, in which a hybrid method combing finite difference method (FDM) and differential transformation method (DTM) is used to solve the governing equations of HSAR system. In order to realize under what kind of operating condition the non-periodic motion will occur to the HSAR system, the dynamic behavior of the rotor center is examined with different operating conditions by generating the corresponding bifurcation diagrams, Poincare maps, and power spectra etc. The results obtained for the orbits of the rotor center are in good agreement with those obtained using the traditional FDM approach. Moreover, the hybrid method increases the accuracy and obtains better numerical stability than the FDM at real operating parameters of the bearing number and computational time-step. The results presented summarize the changes which take place in the dynamic behavior of the HSAR system as the rotor bearing number are increased and therefore provide a useful guideline for the HSAR system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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