Table 1 Mass of the resonant units in each NDVA during the FRF test.

From: A novel dynamic vibration absorber for vibration control of piping systems under multi-frequency harmonic excitations

Parameters

Basic mass (g)

Added mass density (Calculated by thickness, g/mm)

Added mass thickness (mm)

Total mass (g)

LRU

12.2

0.40

12 (10)

17.0

MRU

9.7

0.30

7 (10)

11.8

SRU

7.4

0.22

4 (10)

8.3

  1. The number of the resonant units at a given added mass thickness is in [italics].
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