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Vibration analysis of plates
Kubeš, Filip ; Machů, Zdeněk (referee) ; Rubeš, Ondřej (advisor)
The focus of this bachelor thesis is finding natural frequencies and shapes of thin plate, by using mainly the Chladni figures. Then there is requiered an experimental demonstration on plate excitated, designed acording to FEM model. FEM model was created using software Ansys 2019 workbench. The experiment have been done on plexiglass plate, steel square plate and steel rectangular plate, and aquired frequencies and shapes were compared with the model results. The plates were excitated by electrodynamic shaker from the company The Modal shop, inc. (type K2007E01).
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The dreadnought rib guitar innovation
Hoffman, Pavel ; Nop, Patrik (referee) ; Jirásek, Ondřej (advisor)
This diploma thesis deals with the spectrum analysis, frequency characteristics, Chladni figures and simulation of modal and harmonic analysis of an acoustic guitar in ANSYS program interface. In the acoustic guitar analysis, various details that can influence the instrument spectrum are discussed. Especially on its performance over time, the number of generated harmonic components and their performance. Then the guitar bracing innovation of the dreadnought guitar was created from the measured, simulated and calculated data. Four acoustic guitars with the innovation were then made. These innovated instruments were further analyzed and compared with the acoustic guitar before the innovation and with a competitor’s guitar. Furthermore, the thesis describes parts of an acoustic guitar, wood properties, theoretical background and measurement methods.
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The dreadnought rib guitar innovation
Hoffman, Pavel ; Nop, Patrik (referee) ; Jirásek, Ondřej (advisor)
This diploma thesis deals with the spectrum analysis, frequency characteristics, Chladni figures and simulation of modal and harmonic analysis of an acoustic guitar in ANSYS program interface. In the acoustic guitar analysis, various details that can influence the instrument spectrum are discussed. Especially on its performance over time, the number of generated harmonic components and their performance. Then the guitar bracing innovation of the dreadnought guitar was created from the measured, simulated and calculated data. Four acoustic guitars with the innovation were then made. These innovated instruments were further analyzed and compared with the acoustic guitar before the innovation and with a competitor’s guitar. Furthermore, the thesis describes parts of an acoustic guitar, wood properties, theoretical background and measurement methods.
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Vibration analysis of plates
Kubeš, Filip ; Machů, Zdeněk (referee) ; Rubeš, Ondřej (advisor)
The focus of this bachelor thesis is finding natural frequencies and shapes of thin plate, by using mainly the Chladni figures. Then there is requiered an experimental demonstration on plate excitated, designed acording to FEM model. FEM model was created using software Ansys 2019 workbench. The experiment have been done on plexiglass plate, steel square plate and steel rectangular plate, and aquired frequencies and shapes were compared with the model results. The plates were excitated by electrodynamic shaker from the company The Modal shop, inc. (type K2007E01).
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