Advances in Acoustics and Vibration

Research Article

Improvement of Transmission Loss Using Active Control with Virtual Modal Mass

Table 1

Simulations parameters.
Beam density 𝐸 = 2 . 1 ∗ 1 0 1 1 P a Beam width ℎ = 1 . 5 ∗ 1 0 − 3 m
Beam Young modulus 𝜉 𝑖 = 0 . 0 1 Beam height 𝑙 𝑏 = 6 . 0 ∗ 1 0 − 1 m
Modal damping ratio 𝜌 𝑐 = 7 7 0 0 K g / m 3 Beam length 𝑏 𝑝 = 3 . 0 ∗ 1 0 − 2 m
Ceramic density 𝑌 1 1 = 6 . 6 7 ∗ 1 0 1 0 P a Patch width 𝑒 𝑃 = 0 . 7 ∗ 1 0 − 3 m
Ceramic Young modulus 𝑌 3 3 = 5 . 2 6 ∗ 1 0 1 0 P a Patch height 𝑙 𝑃 = 8 ∗ 1 0 − 2 m
𝜖 𝑠 1 1 = 1 1 4 2 Patch length 𝐴 1 = 2 . 5 ∗ 1 0 − 3 m
Permittivity 𝜖 𝑠 3 3 = 6 6 8 Position 1 𝐴 2 = 4 . 2 5 ∗ 1 0 − 1 m
𝑑 3 1 = − 1 0 8 p C / N Position 2 𝐴 3 = 1 . 6 2 5 ∗ 1 0 − 1 m
Piezoelectricity 𝑑 3 3 = 2 4 0 p C / N Position 3 𝑘
𝑘 𝑖 𝑗