effect of accelerometer mass on thin plate vibration - Jurnal Mekanikal
effect of accelerometer mass on thin plate vibration - Jurnal Mekanikal
effect of accelerometer mass on thin plate vibration - Jurnal Mekanikal
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<strong>Jurnal</strong> <strong>Mekanikal</strong>, December 2009<br />
Figure 3 shows the sec<strong>on</strong>d mode shapes obtained through numerical and<br />
experimental modal analysis. This figure clearly portrays the <str<strong>on</strong>g>effect</str<strong>on</strong>g> <str<strong>on</strong>g>of</str<strong>on</strong>g><br />
<str<strong>on</strong>g>accelerometer</str<strong>on</strong>g> <str<strong>on</strong>g>mass</str<strong>on</strong>g> <strong>on</strong> <strong>thin</strong> <strong>plate</strong>. It shows that the changes to the mode shapes are<br />
more apparent for a larger <str<strong>on</strong>g>accelerometer</str<strong>on</strong>g> <str<strong>on</strong>g>mass</str<strong>on</strong>g>.<br />
Thus, the <str<strong>on</strong>g>effect</str<strong>on</strong>g> <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>accelerometer</str<strong>on</strong>g> <str<strong>on</strong>g>mass</str<strong>on</strong>g> <strong>on</strong> the natural frequency and its<br />
corresp<strong>on</strong>ding mode shapes shows clearly for the <strong>plate</strong>s. The natural frequencies<br />
are proporti<strong>on</strong>al to the inverse <str<strong>on</strong>g>of</str<strong>on</strong>g> the <str<strong>on</strong>g>accelerometer</str<strong>on</strong>g> <str<strong>on</strong>g>mass</str<strong>on</strong>g>. The changed <str<strong>on</strong>g>of</str<strong>on</strong>g> the<br />
mode shapes are more obvious for a larger <str<strong>on</strong>g>accelerometer</str<strong>on</strong>g> <str<strong>on</strong>g>mass</str<strong>on</strong>g>.<br />
Numerical<br />
Analysis<br />
Experimental<br />
Modal Analysis<br />
Numerical<br />
Analysis<br />
Experimental<br />
Modal Analysis<br />
NA<br />
(a) m a : 0g<br />
(113 Hz)<br />
(b) m a : 5.84 g<br />
(108 Hz)<br />
(c) m a : 5.84 g<br />
(102 Hz)<br />
(d) m a : 15.85<br />
g<br />
(102 Hz)<br />
(e) m a : 15.84 g<br />
(96.8 Hz)<br />
(f) m a : 25.84 g<br />
(97 Hz)<br />
(g) m a : 25.84 g<br />
(92.6 Hz)<br />
(h) m a : 35.84 g<br />
(93 Hz)<br />
(i) m a : 35.84 g<br />
(89 Hz)<br />
(j) m a : 45.84 g<br />
(91 Hz)<br />
(k) m a : 45.84 g<br />
(86.3 Hz)<br />
Figure 3 : Comparis<strong>on</strong> <str<strong>on</strong>g>of</str<strong>on</strong>g> the mode shapes for mode 2, the <str<strong>on</strong>g>accelerometer</str<strong>on</strong>g><br />
locate at P1.(NA-Not Aplicable; m a - <str<strong>on</strong>g>accelerometer</str<strong>on</strong>g> <str<strong>on</strong>g>mass</str<strong>on</strong>g>)<br />
5.3 Varying Accelerometer Locati<strong>on</strong> and Accelerometer Mass C<strong>on</strong>stant<br />
The <str<strong>on</strong>g>effect</str<strong>on</strong>g> <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>accelerometer</str<strong>on</strong>g> locati<strong>on</strong> and <str<strong>on</strong>g>accelerometer</str<strong>on</strong>g> <str<strong>on</strong>g>mass</str<strong>on</strong>g> <strong>on</strong> <strong>thin</strong> <strong>plate</strong> was<br />
studied by comparing the natural frequency and its corresp<strong>on</strong>ding mode shapes <str<strong>on</strong>g>of</str<strong>on</strong>g><br />
<str<strong>on</strong>g>accelerometer</str<strong>on</strong>g> <str<strong>on</strong>g>mass</str<strong>on</strong>g>; 5.84 gm and 45.84 gm. These <str<strong>on</strong>g>mass</str<strong>on</strong>g> was selected because<br />
5.84 gm is the smallest <str<strong>on</strong>g>mass</str<strong>on</strong>g>, while 45.84 gm is the largest <str<strong>on</strong>g>mass</str<strong>on</strong>g> tested.<br />
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