Shock Reduction Technique on Thin Plate Structure by Wave Refraction Using an Elastic Patch

Table 2

Comparison of wave reduction performance according to the shape of the patch.

Shape of patch	Normalized mean RMS (m/s^2 RMS)		Reduction ratio	Area of patch (mm^2)	Efficiency (reduction/area, mm^−1)
	Before patch	After patch
Triangle	1	0.185	0.815	10000.0	8.151 × 10^−5
Circle	1	0.202	0.798	31415.9	2.542 × 10^−5
DCX-lens	1	0.292	0.708	17002.2	4.167 × 10^−5