Experimental and numerical investigation on the fundamental natural frequency of a sandwich panel including the effect of ambient air layers

This study is conducted to determine the modal parameters namely natural frequencies and mode shapes of aluminum 6061 (Al6061). The parameters are done by conducting a free dynamic vibration analysis. Modal analysis study was conducted by both simulation and experimental approaches. The simulation was conducted via ANSYS software while the experimental work was performed through impact hammer testing to determine the vibration parameter. Two sensors i.e. piezoelectric film and accelerometer were used. The result obtained were ya = 302.02x – 52.51 (accelerometer) and yp = 295.78x - 41.73 (piezofilm). ya (accelerometer) and yp (piezofilm) is linear equation of the data plotted according to the reading from mode shape versus natural frequency. The relation between natural frequency from accelerometer and piezofilm for the rectangular-shaped specimen was ya = 1.02yp – 9.90 and can be concluded that the regression ratio of 1.02 was approximately 1.0 which agreed with the status of piezoelectric film sensor that can be used as an alternative sensor for accelerometer. There was a good results agreement between simulation and experimental work outcome.

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An Investigation on Light Structure Modal Parameter by Using Experimental Modal Analysis Method via Piezofilm Sensor

Ramli

Nuawi

Abdullah

et al. 2017

Jurnal Teknologi

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Comparison Study on Light Structure Modal Parameter Using Experimental Modal Analysis Method via Piezofilm Sensor

et al. 2018

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This study determines the effect of modal parameters namely natural frequencies and mode shapes of aluminum 6061 (Al6061)through free dynamic vibration analysis and testing. The simulation procedures was conducted via ANSYS software while the experimental work was performed through impact hammer testing. Three types of specimens in the form of circular, square and triangular- shapes were used to determine the vibration parameters. Two sensors i.e. piezoelectric film and accelerometer were used. The results for circular shape were ya = 270.55x – 134.82 (accelerometer) and yp = 280.89x – 215.05 (piezofilm); for square shape were ya = 316.42x – 104.13 (accelerometer) and yp = 309.63x – 43.20 (piezofilm); and for triangular shape were ya = 329.77x – 142.87 (accelerometer) and yp = 305x + 15 (piezofilm). The ya (accelerometer) and yp (piezofilm) are represented as a linear equation of which the data were plotted in mode shape versus natural frequency graph accordingly. By applying the simultaneous equation, the regression ratio can be obtained. The relation between natural frequency and mode shape of accelerometer and piezofilm for the circular-shaped specimen was ya = 0.96yp + 72.3; square-shaped specimen was ya = 1.02yp – 59.98; and triangle-shaped specimen was ya = 1.08yp – 159.08 respectively. The results for the natural frequency from the experimental test were used to compare with the results from the simulation. It was understood that the regression ratios of 0.96, 1.02 and 1.08 of circular-shaped, square-shaped and triangular-shaped were closed to 1.0. The outcome showed that the piezoelectric film sensor is a potential candidate to be used as an alternative sensor for the accelerometer.

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Experimental and numerical investigation on the fundamental natural frequency of a sandwich panel including the effect of ambient air layers

Cited by 2 publications

References 17 publications

An Investigation on Light Structure Modal Parameter by Using Experimental Modal Analysis Method via Piezofilm Sensor

An Investigation on Light Structure Modal Parameter by Using Experimental Modal Analysis Method via Piezofilm Sensor

Comparison Study on Light Structure Modal Parameter Using Experimental Modal Analysis Method via Piezofilm Sensor

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