The Applications of Dynamic Stiffness Method on the Analysis of Asymmetric Rotor-Bearing Systems
碩士 === 元智大學 === 機械工程研究所 === 88 === In this research, critical speed analysis of asymmetric rotor systems was performed by using the dynamic stiffness method. The asymmetric rotors are different from the common symmetric rotors in that the properties at the cross sections of the rotors ar...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
1999
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| Online Access: | http://ndltd.ncl.edu.tw/handle/70493363503466493099 |
| Summary: | 碩士 === 元智大學 === 機械工程研究所 === 88 === In this research, critical speed analysis of asymmetric rotor systems was performed by using the dynamic stiffness method. The asymmetric rotors are different from the common symmetric rotors in that the properties at the cross sections of the rotors are not axisymmtric.
The dynamic stiffness matrices of shaft elements are derived with Rayleigh beam modeling. The element matrices are assembled with the matrices of disks and bearings to form the system matrix, where the compatibility and equilibrium conditions have to be fulfilled at the joints of the elements.
Synchronous critical speeds and subcritical speeds of the asymmetric rotor-bearing systems are analyzed under the effects of various conditions. Damping effects on the stability of the asymmetric rotors are also investigated.
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