The Effect Of Temperature Against Nonlinear Effect In Vibro-Acoustic Method On Solid Structure

Mohd Shahrin, Muhammad Hafidzal (2019) The Effect Of Temperature Against Nonlinear Effect In Vibro-Acoustic Method On Solid Structure. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The purpose of this research is to define the relationship of effect of temperature against nonlinear affect in Vibro-acoustic method on solid structure. Every structure on the machine that was running will be crack because of vibration. How the size of crack we don’t know and it is not easy to find it plus with the certain type of temperature. Therefore, nonlinear vibro-acoustic technique will be used to find or analyse the crack detection. This method is convenient and effective non-destructive detecting approach. It can be applied to various types of materials and can even be used to detect various types of defects. Mostly the researcher used this method to detect the crack. The method considered in this study is based on a combined vibro-acoustic modulation of an intensive low-frequency (modal) vibration (Low frequency) and a weaker high-frequency ultrasonic wave (High frequency). Non-linear acoustic modulation is caused by the crack opening or closing. But it also may be possible that a cracking occurs by heat dissipation that may affect a material structure. So that, an experiment will be setup to analyse and identify the relation of the heat dissipation on solid structure with the intensity of the non-linear acoustic modulation. Modal test and vibro-acoustic test was performed on the aluminium plate to find the frequency and intensity. Finally, the contribution of the heat dissipation against the non-linear acoustic effect for crack detection will be explain and show the result of the research. The result from the experiment show that the heat dissipation does not affect to the intensity of the experiment. There is no distortion of the wave when propagate through the aluminium plate

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