Influence of Coupling Effect Between Tension Force and Journal Roundness Error on Dynamic Characteristics of Engine Camshaft Rotor Bearing System.
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| Title: | Influence of Coupling Effect Between Tension Force and Journal Roundness Error on Dynamic Characteristics of Engine Camshaft Rotor Bearing System. |
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| Authors: | Zhang, Xun1,2 (AUTHOR), Li, Bing1,2 (AUTHOR) gxgxyjxxlb@163.com, Xu, Wubin1,3 (AUTHOR), Zhang, Yulin1,2 (AUTHOR), Guo, Hanyu1,3 (AUTHOR), Niu, Yan (AUTHOR) niuyan_ny@163.com |
| Source: | Shock & Vibration. 2/25/2026, Vol. 2026, p1-13. 13p. |
| Subjects: | Journal bearings, Dynamic stiffness, Rotors, Lagrange equations, Dynamic models, Timoshenko beam theory |
| Abstract: | A dynamic model of a multisupported sliding bearing rotor system (exhaust camshaft) incorporating journal roundness error is established based on the Lagrange equation. The Timoshenko beam element is employed to simulate the flexibility of the shaft segment, while the cam unit is simplified using an eccentric mass block and modeled through the concentrated mass method. This study investigates the coupling effect of sprocket tension and journal roundness error on the stiffness and damping characteristics of the system. The stiffness and damping variations across different bearing positions are analyzed. Results indicate that the coupling effect leads to local oil film thickness fluctuations, with the maximum film thickness fluctuation increasing by 15%. Sliding bearings near the sprocket end (e.g., J1 and J2) exhibit increased stiffness and damping due to higher loads, whereas those farther from the sprocket end (e.g., J3–J6) experience relatively minor load fluctuations. Although their vibration amplitudes are larger, their stiffness and damping variations remain limited due to the light load, resulting in a weaker influence of sprocket tension on these bearings. A brief discussion of model credibility, limitations, and a practical path to validation is included. [ABSTRACT FROM AUTHOR] |
| Copyright of Shock & Vibration is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 191894026 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Influence of Coupling Effect Between Tension Force and Journal Roundness Error on Dynamic Characteristics of Engine Camshaft Rotor Bearing System. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Xun%22">Zhang, Xun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Bing%22">Li, Bing</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> gxgxyjxxlb@163.com</i><br /><searchLink fieldCode="AR" term="%22Xu%2C+Wubin%22">Xu, Wubin</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yulin%22">Zhang, Yulin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Hanyu%22">Guo, Hanyu</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Niu%2C+Yan%22">Niu, Yan</searchLink> (AUTHOR)<i> niuyan_ny@163.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Shock+%26+Vibration%22">Shock & Vibration</searchLink>. 2/25/2026, Vol. 2026, p1-13. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Journal+bearings%22">Journal bearings</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+stiffness%22">Dynamic stiffness</searchLink><br /><searchLink fieldCode="DE" term="%22Rotors%22">Rotors</searchLink><br /><searchLink fieldCode="DE" term="%22Lagrange+equations%22">Lagrange equations</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+models%22">Dynamic models</searchLink><br /><searchLink fieldCode="DE" term="%22Timoshenko+beam+theory%22">Timoshenko beam theory</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A dynamic model of a multisupported sliding bearing rotor system (exhaust camshaft) incorporating journal roundness error is established based on the Lagrange equation. The Timoshenko beam element is employed to simulate the flexibility of the shaft segment, while the cam unit is simplified using an eccentric mass block and modeled through the concentrated mass method. This study investigates the coupling effect of sprocket tension and journal roundness error on the stiffness and damping characteristics of the system. The stiffness and damping variations across different bearing positions are analyzed. Results indicate that the coupling effect leads to local oil film thickness fluctuations, with the maximum film thickness fluctuation increasing by 15%. Sliding bearings near the sprocket end (e.g., J1 and J2) exhibit increased stiffness and damping due to higher loads, whereas those farther from the sprocket end (e.g., J3–J6) experience relatively minor load fluctuations. Although their vibration amplitudes are larger, their stiffness and damping variations remain limited due to the light load, resulting in a weaker influence of sprocket tension on these bearings. A brief discussion of model credibility, limitations, and a practical path to validation is included. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Shock & Vibration is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1155/vib/9403556 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1 Subjects: – SubjectFull: Journal bearings Type: general – SubjectFull: Dynamic stiffness Type: general – SubjectFull: Rotors Type: general – SubjectFull: Lagrange equations Type: general – SubjectFull: Dynamic models Type: general – SubjectFull: Timoshenko beam theory Type: general Titles: – TitleFull: Influence of Coupling Effect Between Tension Force and Journal Roundness Error on Dynamic Characteristics of Engine Camshaft Rotor Bearing System. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhang, Xun – PersonEntity: Name: NameFull: Li, Bing – PersonEntity: Name: NameFull: Xu, Wubin – PersonEntity: Name: NameFull: Zhang, Yulin – PersonEntity: Name: NameFull: Guo, Hanyu – PersonEntity: Name: NameFull: Niu, Yan IsPartOfRelationships: – BibEntity: Dates: – D: 25 M: 02 Text: 2/25/2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 10709622 Numbering: – Type: volume Value: 2026 Titles: – TitleFull: Shock & Vibration Type: main |
| ResultId | 1 |
