A Comparison of Vibroacoustic Response of Isotropic Plate with Attached Discrete Patches and Point Masses Having Different Thickness Variation with Different Taper Ratios

Table 3

Comparison of first four eigenfrequencies () in Hz of unloaded plate with attached discrete patches.

Mode	Unloaded plate (Figure 2(a))	Plate with one discrete patch (Figure 2(b))	% variation in natural frequency	Plate with two discrete patches (Figure 2(c))	% variation in natural frequency	Plate with four discrete patches (Figure 2(d))	% variation in natural frequency
1st	87	86.942	0.066	85.865	1.304	85.102	2.181
2nd	193	192.74	0.134	191.84	0.601	191.19	0.937
3rd	241	239.43	0.651	237.88	1.294	235.43	2.311
4th	345	341.47	1.023	340.54	1.292	337.57	2.153