Dynamics of Anisotropically Supported Rotors
The paper discusses dynamic effects occurring in machinery rotors supported in bearings and pedestals with laterally different characteristics. In the considered rotor model the anisotropy of radial stiffness and tangential (“cross”) stiffness components are included. Within certain ranges of the ro...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
1997-01-01
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| Series: | International Journal of Rotating Machinery |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S1023621X97000134 |
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| _version_ | 1832552877419134976 |
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| author | Agnes Muszynska Charles T. Hatch Donald E. Bently |
| author_facet | Agnes Muszynska Charles T. Hatch Donald E. Bently |
| author_sort | Agnes Muszynska |
| collection | DOAJ |
| description | The paper discusses dynamic effects occurring in machinery rotors supported in bearings and
pedestals with laterally different characteristics. In the considered rotor model the anisotropy
of radial stiffness and tangential (“cross”) stiffness components are included. Within certain
ranges of the rotative speed the support anisotropy leads to the specific, excited-by-unbalance
rotor lateral synchronous vibrations in a form of backward (reverse) precession. In
addition, one section of the rotor may precess backward, while the other section simultaneously
precesses forward. Experimental results illustrate this phenomenon. The analytical
model of the system is based on multimode modal approach. It is also shown in this paper
that greatly enhanced information for machine malfunction diagnostics can be obtained by
simulated rotation of the XY transducer system observing rotor lateral vibration. This simulated
rotation can be accomplished by the machine diagnostic data acquistion and processing
system. The data processing also includes extraction of forward and backward components
of elliptical orbits filtered to one frequency, and the filtered orbit major axis magnitude and
its angular orientation. |
| format | Article |
| id | doaj-art-b89e2ac6ba3b4e5e94dad9e673287a15 |
| institution | Kabale University |
| issn | 1023-621X |
| language | English |
| publishDate | 1997-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-b89e2ac6ba3b4e5e94dad9e673287a152025-02-03T05:57:36ZengWileyInternational Journal of Rotating Machinery1023-621X1997-01-013213314210.1155/S1023621X97000134Dynamics of Anisotropically Supported RotorsAgnes Muszynska0Charles T. Hatch1Donald E. Bently2Bently Rotor Dynamics Research Corporation, P.O. Box 2529, Minden 89423, Nevada, USABently Rotor Dynamics Research Corporation, P.O. Box 2529, Minden 89423, Nevada, USABently Rotor Dynamics Research Corporation, P.O. Box 2529, Minden 89423, Nevada, USAThe paper discusses dynamic effects occurring in machinery rotors supported in bearings and pedestals with laterally different characteristics. In the considered rotor model the anisotropy of radial stiffness and tangential (“cross”) stiffness components are included. Within certain ranges of the rotative speed the support anisotropy leads to the specific, excited-by-unbalance rotor lateral synchronous vibrations in a form of backward (reverse) precession. In addition, one section of the rotor may precess backward, while the other section simultaneously precesses forward. Experimental results illustrate this phenomenon. The analytical model of the system is based on multimode modal approach. It is also shown in this paper that greatly enhanced information for machine malfunction diagnostics can be obtained by simulated rotation of the XY transducer system observing rotor lateral vibration. This simulated rotation can be accomplished by the machine diagnostic data acquistion and processing system. The data processing also includes extraction of forward and backward components of elliptical orbits filtered to one frequency, and the filtered orbit major axis magnitude and its angular orientation.http://dx.doi.org/10.1155/S1023621X97000134Rotating machine dynamicsrotor support anisotropyrotor forward and backward precessionvibration diagnostics of machinery. |
| spellingShingle | Agnes Muszynska Charles T. Hatch Donald E. Bently Dynamics of Anisotropically Supported Rotors International Journal of Rotating Machinery Rotating machine dynamics rotor support anisotropy rotor forward and backward precession vibration diagnostics of machinery. |
| title | Dynamics of Anisotropically Supported Rotors |
| title_full | Dynamics of Anisotropically Supported Rotors |
| title_fullStr | Dynamics of Anisotropically Supported Rotors |
| title_full_unstemmed | Dynamics of Anisotropically Supported Rotors |
| title_short | Dynamics of Anisotropically Supported Rotors |
| title_sort | dynamics of anisotropically supported rotors |
| topic | Rotating machine dynamics rotor support anisotropy rotor forward and backward precession vibration diagnostics of machinery. |
| url | http://dx.doi.org/10.1155/S1023621X97000134 |
| work_keys_str_mv | AT agnesmuszynska dynamicsofanisotropicallysupportedrotors AT charlesthatch dynamicsofanisotropicallysupportedrotors AT donaldebently dynamicsofanisotropicallysupportedrotors |