Study on Characteristics and Optimal Design Method of Externally Pressurized Porous Annular Thrust Gas Bearing with a Thin Surface-Restricted Layer
| Autor: | Kyosuke Ono, Changzhi Cui |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Optimal design
Damping ratio Bearing (mechanical) Materials science business.industry Mechanical Engineering technology industry and agriculture food and beverages Stiffness Thrust Natural frequency Mechanics Structural engineering Low frequency equipment and supplies Industrial and Manufacturing Engineering law.invention body regions Mechanics of Materials law medicine medicine.symptom Porosity business |
| Zdroj: | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C. 63:558-565 |
| ISSN: | 1884-8354 0387-5024 |
| DOI: | 10.1299/kikaic.63.558 |
| Popis: | We numerically analyzed the dynamic characteristics of an externally pressurized porous annular thrust gas bearing which has a thin restricted layer on the porous surface. As a result, it was found that the surface-restricted layer had such an important effect in that it increases stiffness and shifts the positive maximum value of damping from a high-frequency region to a low-frequency region. It can also reduce the magnitude of negative damping in the low-frequency region. Under the conditions of allowable static stiffness and the local minimum value of dynamic stiffness, we derived the unique relationships between the design parameters and the squeeze number that can provide the maximum damping ratio. Considering the mass parameter of the body supported by the bearing, we propose an optimal design method for maximizing damping ratio at the natural frequency, while maintaining the required stiffness in the low frequency region. |
| Databáze: | OpenAIRE |
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