Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Michal HAJŽMAN"'
Publikováno v:
Machines, Vol 10, Iss 2, p 77 (2022)
The paper deals with the modelling of turbine rotors, including a foundation and stator parts, and with their dynamic analysis. The dynamics of turbines can be strongly influenced by the effects of a rotor foundation, and therefore suitable modelling
Externí odkaz:
https://doaj.org/article/bee4934e1d054aeb95fd38f820526088
Autor:
Luboš SMOLÍK, Michal HAJŽMAN
Publikováno v:
Transactions of the VŠB-Technical University of Ostrava, Mechanical Series, Vol 59, Iss 1, Pp 93-98 (2013)
The common sizes and weights of rotors, which can be found e.g. in the energy production industry, allow to employ a standard methodology of an experimental modal analysis. However, certain applications with rotors of small weights lead to the usage
Externí odkaz:
https://doaj.org/article/00753804cbcd419888fc1695c00eb837
Publikováno v:
Transactions of the VŠB-Technical University of Ostrava, Mechanical Series, Vol 59, Iss 1, Pp 1-6 (2013)
This paper is focused on the modelling and dynamic analysis of a nonlinear system representing a control assembly of the VVER 440/V213 nuclear reactor. A simple rigid body model intended for basic dynamic analyses is introduced. It contains the infl
Externí odkaz:
https://doaj.org/article/2dcc093dce7546aabcd3d1532de6b800
Autor:
Radek Bulín, Michal Hajžman
Publikováno v:
Nonlinear Dynamics. 103:2475-2492
A large group of real mechanical problems can be modelled and analysed using the approaches of flexible multibody dynamics. The computational models in the form of differential-algebraic equations can be quite complex, and therefore it is suitable to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ebeed4b5d40f7dfc3cb523ee7e23aa63
https://doi.org/10.1007/s11071-021-06225-5
https://doi.org/10.1007/s11071-021-06225-5
In this paper, we develop an adaptation of the LuGre friction model so as to allow the development of the friction force and its application in any directions on systems subjected to varying normal forces. This is achieved by projecting a modified Lu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9188b2be8f764807a48fd69b9f36f9e7
http://hdl.handle.net/11025/51494
http://hdl.handle.net/11025/51494
Autor:
Luboš Smolík, Jan Rendl, Milan Omasta, Miroslav Byrtus, Petr Šperka, Pavel Polach, Martin Hartl, Michal Hajžman
Publikováno v:
Journal of Sound and Vibration. 546:117454
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e35af85248dd6fa53f8cf19f9378a74
https://doi.org/10.1016/j.jsv.2022.117454
https://doi.org/10.1016/j.jsv.2022.117454
Autor:
Michal Hajžman, Radek Bulín
Publikováno v:
Journal of Mechanical Engineering, Vol 69, Iss 3, Pp 9-16 (2019)
This paper deals with a comparison of the classical belt friction formula, also called Euler-Eytelwein equation, with a detailed belt-cylinder interaction model. The belt friction is a typical pedagogical problem where the usage of equilibrium condit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68b8316647fe4bbca2649c1dfeae590e
https://doi.org/10.2478/scjme-2019-0024
https://doi.org/10.2478/scjme-2019-0024
Publikováno v:
Journal of Sound and Vibration. 442:698-713
Návrhové parametry ložisek s olejovým filmem ovlivňují stabilitu systému rotor-ložisko, která může být charakterizována pomocí tzv. mezní rychlosti a mezní křivky (závisející na úhlové rychlosti čepu hřídele a zvoleném konst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54fa70aab03fabe32c89a706de8ca6ed
https://doi.org/10.1016/j.jsv.2018.10.042
https://doi.org/10.1016/j.jsv.2018.10.042
This paper deals with the modelling and dynamic analysis of thin or slender flexible bodies characterized by axial motion, contacts and friction interaction. Such mechanical systems can be found in cable applications, in petroleum drilling industry,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db7761126a1296a18059632a8f62e143
http://hdl.handle.net/11025/44965
http://hdl.handle.net/11025/44965
This paper presents a transient analysis of the motion of unloaded upper pads in a tilting pad journal bearing. It is known that such pads can exhibit self-excited vibration called pad fluttering, which can initiate fatigue damage due to elastic cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3654ab9123a5bb9d9a897bac25321729
http://hdl.handle.net/11025/49401
http://hdl.handle.net/11025/49401