Study on the Damping Effect of Particle Dampers considering Different Surface Properties
Table 1
Physical properties and energy consumption of various materials.
Material
Elastic modulus, E (GPa)
Yield strength, (MPa)
Density, ρe (kg/)
Dynamic friction coefficient,
Poisson’s ratio,
Particle damping index,
Energy dissipation factor,
Copper
120
100
8500
0.20
0.34
34.749
0.147
Steel
210
210
7800
0.10
0.27
14.038
0.139
Concrete
17
25
2400
0.60
0.20
13.134
0.132
Cast iron
160
250
7200
0.15
0.30
5.537
0.129
Alumina
70
100
3100
0.50
0.25
4.748
0.131
Glass
80
70
2700
0.30
0.20
4.342
0.129
Wood (pine)
14
40
600
0.40
0.25
1.317
0.102
Aluminum alloy
75
300
2700
0.32
0.33
0.7448
0.087
Rubber
0.0061
7
1000
0.45
0.45
0.056
0.004
The yield strength of concrete, glass, and alumina in this table uses their compressive strength. The energy dissipation factor is calculated according to the theoretic model established above.
