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Izbira gladilne spremenljivke z optičnimi napetostnimi nanosi
Kravčenkiene, Violeta (Author), Aleksa, Algiment (Author), Ragulskis, Minvydas (Author), Maskeliunas, Rimas (Author)

URLURL - Presentation file, Visit http://www.dlib.si/details/URN:NBN:SI:doc-XD116WX0 This link opens in a new window

Abstract
V prispevku je opisana metoda izbire gladilne spremenljivke. Prikazana je na problemu fotoelastične analize upogibnih nihanj plosče. Model končnih elementov sistema temelji na aproksimaciji pomikov vozlišč, medtem ko na postavitev zunanjih robov vpliva polje napetosti v fotoelastičnem nanosu. Vzorci zunanjih robov, ki smo jih ustvarili brez glajenja, se na mejah med elementi vedejo nenaravno. V primeru, da je gladilna spremenljivka prevelika, dobimo preveč zglajeno sliko, ki sicer lahko izgleda sprejemljivo, vendar je daleč od resnične fotoelastične slike. Predstavljen način izbire optimalne gladilne spremenljivke je posplošen za dvorazsežne Lagrangeve končne elemente.

Language:English
Keywords:gladilne spremenljivke, izbor spremenljivk, plošče, upogibna nihanja, fotoelastične analize, smoothing parameters, parameter choice, plates, bending vibrations, photo-elastic coatings
Work type:Not categorized (r6)
Tipology:1.03 - Short Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2006
Publisher:Association of Mechanical Engineers and Technicians of Slovenia et al.
Number of pages:str. 237-241
Numbering:Letn. 52, št. 4
UDC:539.413:624.073
ISSN on article:0039-2480
COBISS.SI-ID:9493531 Link is opened in a new window
Views:330
Downloads:145
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Record is a part of a journal

Title:Strojniški vestnik
Shortened title:Stroj. vestn.
Publisher:Zveza strojnih inženirjev in tehnikov Slovenije [et al.], = Association of Mechanical Engineers and Technicians of Slovenia [et al.]
ISSN:0039-2480
COBISS.SI-ID:762116 This link opens in a new window

Secondary language

Language:Unknown
Title:Choice of smoothing parameter using photo-elastic coatings
Abstract:
A method of choosing a smoothing parameter is described and illustrated for the problem of a photo-elastic analysis of the bending vibrations of a plate. The finite-element model of the system is based on an approximation of the nodal displacements, while the formation of fringes is governed by the stress field in the photo-elastic coating. Without smoothing the reconstructed patterns of the fringes exhibit a non-physical behaviour at inter-element boundaries. When the smoothing parameter is too big, an over-smoothed image isobtained, which may look acceptable but be far from the realistic photo-elastic image. The presented strategy for the selection of the optimum smoothing parameter is generalised for two-dimensional Lagrange finite elements.


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