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Vibroakustično modeliranje alternatorja
Furlan, Martin (Author), Rebec, Robert (Author), Černigoj, Andrej (Author), Čelič, Damjan (Author), Čermelj, Primož (Author), Boltežar, Miha (Author)

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

Abstract
V prispevku so predstavljeni osnovni prijemi pri izdelavi sklopljenega modela alternatorja za ovrednotenje vibroakustičnega odziva kot posledice različnih vzbujanj alternatorja: vibracij motorja z notranjim zgorevanjem, neuravnoteženosti rotorja ter magnetnih sil. Prikazani sta izdelava in preverjanje strukturnih trirazsežnih (3D) modelov metode končnih elementov (MKE) za osnovne sestavne dele: posamezne povezane sklope in za alternator kot celoto. Preverjanje strukturnih modelov je izvedeno z eksperimentalno modalno analizo (EMA), ki je obenem namenjena za ovrednotenje dušenja ter posodobitev strukturnega modela alternatorja. Natančneje je opisan poseben primer izračuna vibroakustičnega odziva kot posledice vzbujanja magnetnih sil.Pri tem je bil za ovrednotenje magnetnih sil izdelan trirazsežni model MKEza magnetno polje, tako da je omogočal harmonsko analizo magnetnih sil in njihov neposreden prenos v strukturni model MKE alternatorja. Na podlagi poznanega vzbujanja alternatorja, tj. magnetnih sil v določenih obratovalnih razmerah, je bil ovrednoten in analiziran strukturni in akustični odziv alternatorja.

Language:Slovenian
Work type:Not categorized (r6)
Tipology:1.01 - Original 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. 112-125
Numbering:Letn. 52, št. 2
UDC:534.83:621.43.044:519.61/.64
ISSN on article:0039-2480
COBISS.SI-ID:9002523 Link is opened in a new window
Views:801
Downloads:198
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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:English
Title:Vibro-acoustic modelling of an alternator
Abstract:
In this paper we present the basic approaches to building a sequentially coupled model of an alternator to evaluate the vibro-acoustic response resulting from different excitations, such as engine vibration, rotor unbalance and magnetic forces. Special emphasis is given to the set-up and verification of the three-dimensional (3D) structural finite-element (FE) model for the whole alternator and for the alternator components. The verification of the structural model was carried out using experimental modal analysis (EMA), which was also applied for the estimation of the modal dampingand for the structural FE model updating. Special emphasis is given to the evaluation of magnetic noise, generated due to the magnetic force excitation in the alternator. To estimate the magnetic forces and their harmonic components a 3D magnetic FE model of the alternator was prepared. Finally, the exciting magnetic forces, calculated for the specific operation conditions of the alternator, were transferred into a structural FE model, where the structural and acoustic responses were calculated and analysed.

Keywords:alternators, vibrations, finite element methods, boundary element methods, modal analysis

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