Experimental identification of rotating and stationary damping in a cracked rotor system with an offset disc
In the rotor system, depending upon the ratio of rotating (internal) damping and stationary (external) damping, above the critical speed may develop instability regions. The crack adds to the rotating damping due to the rubbing action between two faces of a breathing crack. Therefore, there is a nee...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences
2019-12-01
|
| Series: | Archive of Mechanical Engineering |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/114745/PDF/AME_2019_131357.pdf |
| _version_ | 1798041036307562496 |
|---|---|
| author | Dipendra Kumar Roy Rajiv Tiwari |
| author_facet | Dipendra Kumar Roy Rajiv Tiwari |
| author_sort | Dipendra Kumar Roy |
| collection | DOAJ |
| description | In the rotor system, depending upon the ratio of rotating (internal) damping and stationary (external) damping, above the critical speed may develop instability regions. The crack adds to the rotating damping due to the rubbing action between two faces of a breathing crack. Therefore, there is a need to estimate the rotating damping and other system parameters based on experimental investigation. This paper deals with a physical model based an experimental identification of the rotating and stationary damping, unbalance, and crack additive stiffness in a cracked rotor system. The model of the breathing crack is considered as of a switching force function, which gives an excitation in multiple harmonics and leads to rotor whirls in the forward and backward directions. According to the rotor system model considered, equations of motion have been derived, and it is converted into the frequency domain for developing the estimation equation. To validate the methodology in an experimental setup, the measured time domain responses are converted into frequency domain and are utilized in the developed identification algorithm to estimate the rotor parameters. The identified parameters through the experimental data are used in the analytical rotor model to generate responses and to compare them with experimental responses. |
| first_indexed | 2024-04-11T22:15:54Z |
| format | Article |
| id | doaj.art-e780a0e7a3544128937b45c72c9de399 |
| institution | Directory Open Access Journal |
| issn | 2300-1895 |
| language | English |
| last_indexed | 2024-04-11T22:15:54Z |
| publishDate | 2019-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archive of Mechanical Engineering |
| spelling | doaj.art-e780a0e7a3544128937b45c72c9de3992022-12-22T04:00:24ZengPolish Academy of SciencesArchive of Mechanical Engineering2300-18952019-12-01vol. 66No 4447474https://doi.org/10.24425/ame.2019.131357Experimental identification of rotating and stationary damping in a cracked rotor system with an offset discDipendra Kumar Roy0Rajiv Tiwari1Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati – 781039, India.Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati – 781039, India.In the rotor system, depending upon the ratio of rotating (internal) damping and stationary (external) damping, above the critical speed may develop instability regions. The crack adds to the rotating damping due to the rubbing action between two faces of a breathing crack. Therefore, there is a need to estimate the rotating damping and other system parameters based on experimental investigation. This paper deals with a physical model based an experimental identification of the rotating and stationary damping, unbalance, and crack additive stiffness in a cracked rotor system. The model of the breathing crack is considered as of a switching force function, which gives an excitation in multiple harmonics and leads to rotor whirls in the forward and backward directions. According to the rotor system model considered, equations of motion have been derived, and it is converted into the frequency domain for developing the estimation equation. To validate the methodology in an experimental setup, the measured time domain responses are converted into frequency domain and are utilized in the developed identification algorithm to estimate the rotor parameters. The identified parameters through the experimental data are used in the analytical rotor model to generate responses and to compare them with experimental responses.https://journals.pan.pl/Content/114745/PDF/AME_2019_131357.pdfrotating (internal) dampingstationary (external) dampinggyroscopic effectswitching crackunbalancefull-spectrum |
| spellingShingle | Dipendra Kumar Roy Rajiv Tiwari Experimental identification of rotating and stationary damping in a cracked rotor system with an offset disc Archive of Mechanical Engineering rotating (internal) damping stationary (external) damping gyroscopic effect switching crack unbalance full-spectrum |
| title | Experimental identification of rotating and stationary damping in a cracked rotor system with an offset disc |
| title_full | Experimental identification of rotating and stationary damping in a cracked rotor system with an offset disc |
| title_fullStr | Experimental identification of rotating and stationary damping in a cracked rotor system with an offset disc |
| title_full_unstemmed | Experimental identification of rotating and stationary damping in a cracked rotor system with an offset disc |
| title_short | Experimental identification of rotating and stationary damping in a cracked rotor system with an offset disc |
| title_sort | experimental identification of rotating and stationary damping in a cracked rotor system with an offset disc |
| topic | rotating (internal) damping stationary (external) damping gyroscopic effect switching crack unbalance full-spectrum |
| url | https://journals.pan.pl/Content/114745/PDF/AME_2019_131357.pdf |
| work_keys_str_mv | AT dipendrakumarroy experimentalidentificationofrotatingandstationarydampinginacrackedrotorsystemwithanoffsetdisc AT rajivtiwari experimentalidentificationofrotatingandstationarydampinginacrackedrotorsystemwithanoffsetdisc |