EXPERIMENTAL AND NUMERICAL IDENTIFICATION OF STRUCTURAL MODES FOR ENGINEERING EDUCATION

Aleksandar Borković, Dragan D. Milašinović, Valentina Golubović-Bugarski, Ognjen Mijatović, Manuel Desančić

DOI Number
-
First page
161
Last page
172

Abstract


Abstract. Development of simple classroom demonstration device and software for visualization of structural normal modes is presented. Device is made of parts of old speaker, controlled with personal computer, where the harmonic motion of solenoid is used as an excitation for beam and plate models. Simple code for finite element free vibration analysis of plates is written in Wolfram Mathematica. Good agreement of results and attractive visual patterns of normal modes attracted attention of students. Results are confirmed using modern modal testing methods. Presented approach is complementary to standard teaching of structural dynamics.

Key words: engineering education, normal modes, Chladni plate, modal testing, finite element method


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References


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ISSN 0354-4605 (Print)
ISSN 2406-0860 (Online)
COBISS.SR-ID 98807559