Nonlinear dynamic analysis of a tilting pad journal bearing subjected to pad fluttering
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F21%3A43962279" target="_blank" >RIV/49777513:23520/21:43962279 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs11071-021-06748-x" target="_blank" >https://link.springer.com/article/10.1007%2Fs11071-021-06748-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11071-021-06748-x" target="_blank" >10.1007/s11071-021-06748-x</a>
Alternative languages
Result language
angličtina
Original language name
Nonlinear dynamic analysis of a tilting pad journal bearing subjected to pad fluttering
Original language description
This work brings an overview of the nonlinear dynamics of four-segment tilting pad journal bearings (TPJB) in load-between-pads configuration supported on flexible pivots. We focus primarily on analysing the sub-synchronous motion of statically unloaded pads, also called pad fluttering. In this particular case, the motion deviates between chaotic and periodic due to 1:4, 1:5, 1:6 and 1:7 internal resonances. The response is analysed with bifurcation diagrams and characterised with estimates of the largest Lyapunov exponents. Unlike previous works, we show that pad fluttering disappears at relative eccentricities lower than 0.34. This behaviour is enabled due to a fixed point trajectory that is not predicted by analysing static equilibria. The observation is crucial for high-speed rotating machinery supported on TPJBs, including pinions in multi-stage compressors and microturbines. The analysis is performed using a verified computational model which includes fluid-structure interaction and potential Hertzian contacts between individual parts of the TPJB. This model exploits local and auxiliary coordinate systems for a straightforward description of acting forces. Furthermore, we provide a detailed step-by-step discussion regarding the model formulation employing the finite difference method to solve hydrodynamic lubrication.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20302 - Applied mechanics
Result continuities
Project
<a href="/en/project/EF17_048%2F0007267" target="_blank" >EF17_048/0007267: Research and Development of Intelligent Components of Advanced Technologies for the Pilsen Metropolitan Area (InteCom)</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
NONLINEAR DYNAMICS
ISSN
0924-090X
e-ISSN
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Volume of the periodical
105
Issue of the periodical within the volume
3
Country of publishing house
CH - SWITZERLAND
Number of pages
24
Pages from-to
2133-2156
UT code for WoS article
000679777900002
EID of the result in the Scopus database
2-s2.0-85111536496