A Simplified Identification Method of Dynamic Stiffness for the Heavy-Load and Low-Speed Journal Bearings
Journal bearing is an essential part of the propulsion shafting system, whose performance directly affects the safety and performance of the shaft and even the entire ship. It is an important, but also a difficult task to obtain the accurate dynamic stiffness values. In order to determine the dynami...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
2020-01-01
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| Series: | Tehnički Vjesnik |
| Subjects: | |
| Online Access: | https://hrcak.srce.hr/file/340468 |
| _version_ | 1797207275900764160 |
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| author | Junning Li* Ka Han* Wei Chen |
| author_facet | Junning Li* Ka Han* Wei Chen |
| author_sort | Junning Li* |
| collection | DOAJ |
| description | Journal bearing is an essential part of the propulsion shafting system, whose performance directly affects the safety and performance of the shaft and even the entire ship. It is an important, but also a difficult task to obtain the accurate dynamic stiffness values. In order to determine the dynamic characteristics of the journal bearing with specific structural characteristics under specific working conditions, an inverted test platform with multiple sensors for the dynamic stiffness of the heavy-load, low-speed journal bearings (HLLSJBs) was developed, and a novel dynamic test system calibration method was proposed to obtain accurate baseline data, and then the effective characteristic frequency response was gotten based on a refined fast Fourier transform method (RFFT). The present study proposed a simplified identification method to analyze the constitutive relationships between the oil film dynamic parameters and the dynamic stiffness under different rotation and loading conditions in the journal bearing, and then the accurate values of the oil film dynamic stiffness of HLLSJBs were obtained. Furthermore, the values of the structural dynamic stiffness of HLLSJBs were also obtained using a hammer impact method. A comparison with the classic theoretical analysis results reveals that the method proposed is more accurate and effective. |
| first_indexed | 2024-04-24T09:20:20Z |
| format | Article |
| id | doaj.art-6acf5e49fa5c45f78d52ba78a42dc31e |
| institution | Directory Open Access Journal |
| issn | 1330-3651 1848-6339 |
| language | English |
| last_indexed | 2024-04-24T09:20:20Z |
| publishDate | 2020-01-01 |
| publisher | Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek |
| record_format | Article |
| series | Tehnički Vjesnik |
| spelling | doaj.art-6acf5e49fa5c45f78d52ba78a42dc31e2024-04-15T16:03:57ZengFaculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in OsijekTehnički Vjesnik1330-36511848-63392020-01-0127112513210.17559/TV-20180710193445A Simplified Identification Method of Dynamic Stiffness for the Heavy-Load and Low-Speed Journal BearingsJunning Li*0Ka Han*1Wei Chen2School of Mechatronic Engineering, Xi'an Technological University, No. 2, Xuefu Road, Xi'an, Shannxi, 710021, P. R. ChinaSchool of Mechatronic Engineering, Xi'an Technological University, No. 2, Xuefu Road, Xi'an, Shannxi, 710021, P. R. ChinaKey Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, School of Mechanical Engineering, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shannxi, 710049, P. R. ChinaJournal bearing is an essential part of the propulsion shafting system, whose performance directly affects the safety and performance of the shaft and even the entire ship. It is an important, but also a difficult task to obtain the accurate dynamic stiffness values. In order to determine the dynamic characteristics of the journal bearing with specific structural characteristics under specific working conditions, an inverted test platform with multiple sensors for the dynamic stiffness of the heavy-load, low-speed journal bearings (HLLSJBs) was developed, and a novel dynamic test system calibration method was proposed to obtain accurate baseline data, and then the effective characteristic frequency response was gotten based on a refined fast Fourier transform method (RFFT). The present study proposed a simplified identification method to analyze the constitutive relationships between the oil film dynamic parameters and the dynamic stiffness under different rotation and loading conditions in the journal bearing, and then the accurate values of the oil film dynamic stiffness of HLLSJBs were obtained. Furthermore, the values of the structural dynamic stiffness of HLLSJBs were also obtained using a hammer impact method. A comparison with the classic theoretical analysis results reveals that the method proposed is more accurate and effective.https://hrcak.srce.hr/file/340468journal bearingmultiple sensorsoil film dynamic stiffnesspropulsion shafting systemstructural dynamic stiffness |
| spellingShingle | Junning Li* Ka Han* Wei Chen A Simplified Identification Method of Dynamic Stiffness for the Heavy-Load and Low-Speed Journal Bearings Tehnički Vjesnik journal bearing multiple sensors oil film dynamic stiffness propulsion shafting system structural dynamic stiffness |
| title | A Simplified Identification Method of Dynamic Stiffness for the Heavy-Load and Low-Speed Journal Bearings |
| title_full | A Simplified Identification Method of Dynamic Stiffness for the Heavy-Load and Low-Speed Journal Bearings |
| title_fullStr | A Simplified Identification Method of Dynamic Stiffness for the Heavy-Load and Low-Speed Journal Bearings |
| title_full_unstemmed | A Simplified Identification Method of Dynamic Stiffness for the Heavy-Load and Low-Speed Journal Bearings |
| title_short | A Simplified Identification Method of Dynamic Stiffness for the Heavy-Load and Low-Speed Journal Bearings |
| title_sort | simplified identification method of dynamic stiffness for the heavy load and low speed journal bearings |
| topic | journal bearing multiple sensors oil film dynamic stiffness propulsion shafting system structural dynamic stiffness |
| url | https://hrcak.srce.hr/file/340468 |
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