Effects of the contact configurations on the nonlinear dynamics of a rotor-stator contact system
This study delves into the effects of the contact configurations on the nonlinear dynamics of rotor-stator contact systems through analytical investigation. In rotating machinery, the occurrence of harmful vibrations known as rubbing has been reported when the rotor and stator come into contact at s...
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2025-04-01
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| Series: | Mechanical Engineering Journal |
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| Online Access: | https://www.jstage.jst.go.jp/article/mej/12/2/12_24-00436/_pdf/-char/en |
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| _version_ | 1849738014352211968 |
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| author | Daijiroh YOSHIMORI Yoshiki SUGAWARA Masakazu TAKEDA |
| author_facet | Daijiroh YOSHIMORI Yoshiki SUGAWARA Masakazu TAKEDA |
| author_sort | Daijiroh YOSHIMORI |
| collection | DOAJ |
| description | This study delves into the effects of the contact configurations on the nonlinear dynamics of rotor-stator contact systems through analytical investigation. In rotating machinery, the occurrence of harmful vibrations known as rubbing has been reported when the rotor and stator come into contact at specific rotational speeds. To prevent this phenomenon, the characteristics must be understood. This study focuses on the contact configurations between the rotor and stator, emphasizing the stator thickness. Therefore, a contact model that considers the effects of these contact configurations has been developed. The contact detection between the rotor and stator is conducted analytically by considering their geometric shapes and orientations. The influence of contact from the stator to the rotor is represented by an external force, calculated using the Kelvin-Voigt model, and an external moment, determined by the working point of the external force along the axial direction. The analysis is centered on an overhung rotor, which is modeled using the finite element method. Through bifurcation analysis, the main behaviors of the rotor-stator contact system are observed by utilizing the proposed contact model, demonstrating the validity of the contact model. The bifurcation diagram reveals that the band in which partial contact motion occurs tends to shift toward higher rotational speeds as the stator thickness increases. This shift is attributed to the stiffening effect caused by the substantial reduction in clearance and the impact of the external moment resulting from consideration of the stator thickness. |
| format | Article |
| id | doaj-art-574c46c4c5e94bb8a3dd7bcde2beb663 |
| institution | DOAJ |
| issn | 2187-9745 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Mechanical Engineering Journal |
| spelling | doaj-art-574c46c4c5e94bb8a3dd7bcde2beb6632025-08-20T03:06:44ZengThe Japan Society of Mechanical EngineersMechanical Engineering Journal2187-97452025-04-0112224-0043624-0043610.1299/mej.24-00436mejEffects of the contact configurations on the nonlinear dynamics of a rotor-stator contact systemDaijiroh YOSHIMORI0Yoshiki SUGAWARA1Masakazu TAKEDA2Graduate School of Science and Engineering, Aoyama Gakuin UniversityDepartment of Mechanical Engineering, Aoyama Gakuin UniversityDepartment of Mechanical Engineering, Aoyama Gakuin UniversityThis study delves into the effects of the contact configurations on the nonlinear dynamics of rotor-stator contact systems through analytical investigation. In rotating machinery, the occurrence of harmful vibrations known as rubbing has been reported when the rotor and stator come into contact at specific rotational speeds. To prevent this phenomenon, the characteristics must be understood. This study focuses on the contact configurations between the rotor and stator, emphasizing the stator thickness. Therefore, a contact model that considers the effects of these contact configurations has been developed. The contact detection between the rotor and stator is conducted analytically by considering their geometric shapes and orientations. The influence of contact from the stator to the rotor is represented by an external force, calculated using the Kelvin-Voigt model, and an external moment, determined by the working point of the external force along the axial direction. The analysis is centered on an overhung rotor, which is modeled using the finite element method. Through bifurcation analysis, the main behaviors of the rotor-stator contact system are observed by utilizing the proposed contact model, demonstrating the validity of the contact model. The bifurcation diagram reveals that the band in which partial contact motion occurs tends to shift toward higher rotational speeds as the stator thickness increases. This shift is attributed to the stiffening effect caused by the substantial reduction in clearance and the impact of the external moment resulting from consideration of the stator thickness.https://www.jstage.jst.go.jp/article/mej/12/2/12_24-00436/_pdf/-char/enrotor stator contactcontact configurationspartial contact motionrubbinginternal resonancebifurcationoverhung rotor |
| spellingShingle | Daijiroh YOSHIMORI Yoshiki SUGAWARA Masakazu TAKEDA Effects of the contact configurations on the nonlinear dynamics of a rotor-stator contact system Mechanical Engineering Journal rotor stator contact contact configurations partial contact motion rubbing internal resonance bifurcation overhung rotor |
| title | Effects of the contact configurations on the nonlinear dynamics of a rotor-stator contact system |
| title_full | Effects of the contact configurations on the nonlinear dynamics of a rotor-stator contact system |
| title_fullStr | Effects of the contact configurations on the nonlinear dynamics of a rotor-stator contact system |
| title_full_unstemmed | Effects of the contact configurations on the nonlinear dynamics of a rotor-stator contact system |
| title_short | Effects of the contact configurations on the nonlinear dynamics of a rotor-stator contact system |
| title_sort | effects of the contact configurations on the nonlinear dynamics of a rotor stator contact system |
| topic | rotor stator contact contact configurations partial contact motion rubbing internal resonance bifurcation overhung rotor |
| url | https://www.jstage.jst.go.jp/article/mej/12/2/12_24-00436/_pdf/-char/en |
| work_keys_str_mv | AT daijirohyoshimori effectsofthecontactconfigurationsonthenonlineardynamicsofarotorstatorcontactsystem AT yoshikisugawara effectsofthecontactconfigurationsonthenonlineardynamicsofarotorstatorcontactsystem AT masakazutakeda effectsofthecontactconfigurationsonthenonlineardynamicsofarotorstatorcontactsystem |