Parameters Optimization for a Kind of Dynamic Vibration Absorber with Negative Stiffness

Table 3

The variances and decrease ratios of the displacement of the primary system.

Model of DVA	Variances	Decrease ratios (%)
Without DVA
DVA by Den Hartog		84.45
DVA by Ren		86.57
DVA by Asami		85.55
Our result		93.86