A New Design of Vibration Absorber for Periodic Excitation

Table 1

The geometrical and material properties of PVA.

(a)

Specimen A
	First beam (SUS304)	Second beam (Al)
Density (kg/m^3)	𝜌1=7800	𝜌2=2710
Modulus (×10^9 N/m^2)	𝐸1=200	𝐸2=69
Thickness (mm)	ℎ1=0.88	ℎ2=3.68
Width (mm)	𝑏1=20.0	𝑏2=27.57
Length (mm)	𝐿1=175.0	𝐿2=175.0

Spring constant: 𝑘=0.791 KN/m; connecting location: 𝑥_𝑠=171.5 mm.
𝑓₁=70 Hz.

(b)

Specimen B
	First beam (SUS304)	Second beam (Al)
Density (kg/m^3)	𝜌1=7800	𝜌2=2710
Modulus (×10^9 N/m^2)	𝐸1=200	𝐸2=69
Thickness (mm)	ℎ1=1.19	ℎ2=4.97
Width (mm)	𝑏1=25.0	𝑏2=34.47
Length (mm)	𝐿1=250.0	𝐿2=250.0

Spring constant: 𝑘=0.8301 KN/m; Connecting location: 𝑥_𝑠=245.0 mm.
𝑓₁=35 Hz.