Vibroakustično modeliranje alternatorja

Furlan, Martin (author), Rebec, Robert (author), Černigoj, Andrej (author), Čelič, Damjan (author), Čermelj, Primož (author), Boltežar, Miha (author)

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
• Average score: (0 votes)
• Your score: Voting is allowed only to logged in users.

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

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