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

Table 4

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

Mode	Unloaded plate (Figure 2(a))	Plate with one discrete point mass (Figure 2(b))	% variation in natural frequency	Plate with two discrete point masses (Figure 2(c))	% variation in natural frequency	Plate with four discrete point masses (Figure 2(d))	% variation in natural frequency
1st	87	73.022	16.066	84.497	2.877	83.558	3.956
2nd	193	189.87	1.621	177.85	7.849	174.55	9.559
3rd	241	235.14	2.431	229.32	4.846	224.63	6.792
4th	345	310.88	9.889	284.54	17.524	281.54	18.394