TY - JOUR
T1 - Low frequency acoustic properties of bilayer membrane acoustic metamaterial with magnetic oscillator
AU - Gao, Nansha
AU - Hou, Hong
AU - Mu, Yihao
N1 - Publisher Copyright:
© 2017 The Author(s)
PY - 2017/7
Y1 - 2017/7
N2 - A bilayer membrane acoustic metamaterial was proposed to overcome the influence of the mass law on traditional acoustic materials and obtain a lightweight thin-layer structure that can effectively isolate low frequency noise. The finite element analysis (FEA) results agree well with the experimental results. It is proved that the sound transmission losses (STLs) of the proposed structures are higher than those of same surface density acoustic materials. The introduction of the magnetic mass block is different from the traditional design method, in which only a passive mass block is fixed on the membrane. The magnetic force will cause tension in the membrane, increase membrane prestress, and improve overall structural stiffness. The effects of the geometry size on the STLs are discussed in detail. The kind of method presented in this paper can provide a new means for engineering noise control.
AB - A bilayer membrane acoustic metamaterial was proposed to overcome the influence of the mass law on traditional acoustic materials and obtain a lightweight thin-layer structure that can effectively isolate low frequency noise. The finite element analysis (FEA) results agree well with the experimental results. It is proved that the sound transmission losses (STLs) of the proposed structures are higher than those of same surface density acoustic materials. The introduction of the magnetic mass block is different from the traditional design method, in which only a passive mass block is fixed on the membrane. The magnetic force will cause tension in the membrane, increase membrane prestress, and improve overall structural stiffness. The effects of the geometry size on the STLs are discussed in detail. The kind of method presented in this paper can provide a new means for engineering noise control.
KW - Bilayer membrane acoustic metamaterial
KW - Low frequency sound insulation
KW - Magnet oscillator
KW - Sound transmission loss
UR - http://www.scopus.com/inward/record.url?scp=85022074381&partnerID=8YFLogxK
U2 - 10.1016/j.taml.2017.06.001
DO - 10.1016/j.taml.2017.06.001
M3 - 快报
AN - SCOPUS:85022074381
SN - 2095-0349
VL - 7
SP - 252
EP - 257
JO - Theoretical and Applied Mechanics Letters
JF - Theoretical and Applied Mechanics Letters
IS - 4
ER -