Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Luděk Pešek"'
Publikováno v:
Bulletin of the Polish Academy of Sciences: Technical Sciences, Vol 71, Iss 6 (2023)
A new approach to calculations based on the modal synthesis method is proposed for the evaluation of structural and dry-friction damping effects on self-excited vibrations due to aeroelastic instability in bladed turbine wheels. The method described
Externí odkaz:
https://doaj.org/article/a223deceafbe41538927334edb3dd865
Publikováno v:
Bulletin of the Polish Academy of Sciences: Technical Sciences, Vol 69, Iss 6 (2021)
The analysis of subsonic stall flutter in turbomachinery blade cascade is carried out using a medium-fidelity reduced-order aeroelastic numerical model. The model is a type of field mesh-free approach and based on a hybrid boundary element method. Th
Externí odkaz:
https://doaj.org/article/db6731c08591420c98c8cba79127ce11
Publikováno v:
Shock and Vibration, Vol 2021 (2021)
Interblade contacts and damping evaluation of the turbine bladed wheel with prestressed dry friction contacts are solved by the 3D finite element method with the surface-to-surface dry friction contact model. This makes it possible to model the space
Externí odkaz:
https://doaj.org/article/5a857f8a53654fbb9db745b18bb774e9
In this paper a cost effective numerical model for subsonic classical flutter analysis for turbomachinery is presented. The model is based on reduced order aeroelastic modeling (ROAM) approach. The prime objective of the ROAM is to significantly redu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3f6cbc7e0afddd0585542def3794f05
https://doi.org/10.21203/rs.3.rs-252660/v1
https://doi.org/10.21203/rs.3.rs-252660/v1
Publikováno v:
International Journal of Mechanical Sciences. 222:107222
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::479dd42ec8f5b3e2d3e1ff592df7f7f4
https://doi.org/10.1016/j.ijmecsci.2022.107222
https://doi.org/10.1016/j.ijmecsci.2022.107222
Publikováno v:
Lecture Notes in Mechanical Engineering ISBN: 9789811580482
This paper deals with the optimization of BONASILENCE damping ring inserted into a groove on a monoblock railway wheel to suppress radial and axial mode shapes of vibrations that cause rolling and curve squeal noise. A free open-ended damping ring ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed0214b031387006615946407d825d07
https://doi.org/10.1007/978-981-15-8049-9_80
https://doi.org/10.1007/978-981-15-8049-9_80
Publikováno v:
Lecture Notes in Mechanical Engineering ISBN: 9789811580482
In this contribution, a bladed wheel with dry friction couplings in tie bosses between neighbouring blades is studied. Bladed wheel is excited by stator nozzle excitation in addition to aeroelastic self-excitation modelled by Van der Pol model. Two t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f608243bc9e1b36cd2dfa0558c0e66e1
https://doi.org/10.1007/978-981-15-8049-9_21
https://doi.org/10.1007/978-981-15-8049-9_21
Publikováno v:
Journal of Sound and Vibration. 436:286-294
Flutter running waves in turbine blade cascade were often observed at experimental investigation of blades vibrations, but theirs detailed analysis has not yet been sufficiently realized. This contribution tries to explain origin and behavior of runn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc2a7a13122e129e41a6e947e1a9626c
https://doi.org/10.1016/j.jsv.2018.08.011
https://doi.org/10.1016/j.jsv.2018.08.011
Publikováno v:
Journal of Vibration Engineering & Technologies. 6:273-279
The multipoint optical system, based on fast optical elements, for precise laboratory measurements of vibration of turbine blades under rotation was proposed in the IT AS CR. The optical system registers time passages of the blades. The paper describ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bea7a8a54fb5b07bbf3f2bc1a054a5ff
https://doi.org/10.1007/s42417-018-0043-2
https://doi.org/10.1007/s42417-018-0043-2
Publikováno v:
Applied and Computational Mechanics, Vol 12, Iss 1, Pp 111-118 (2018)
In this paper, we are proposing a new formulation of dissipated energy of hard rubbers as a function of the deformation energy expressed by the Yeoh hyperelastic model. Torsion deformation is considered as a planar deformation of a simple shear on th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6c09f78c25f3a5b8c125be664fcd74d
https://www.kme.zcu.cz/acm/acm/article/view/422/458
https://www.kme.zcu.cz/acm/acm/article/view/422/458