z-logo
open-access-imgOpen Access
Simulation of a metamaterial beam for mechanical wave absorption
Author(s) -
Lin Guo-Chang,
Hongjian Sun,
Huifeng Tan,
Xi Du
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.034302
Subject(s) - metamaterial , spring (device) , beam (structure) , isotropy , stiffness , physics , materials science , optics , mechanics , composite material , thermodynamics
In this paper, we present a metamaterial beam consisting of a uniform isotropic beam with many small mass-spring systems serving as mechanical wave absorbers. Based on the analysis of two different mass-spring systems, negative effective mass and negative effective stiffness are explained theoretically. The governing equations of a unit cell of a metamaterial beam are derived using the Hamilton’s principle. The mechanical wave absorbabilities of the following two different finite metamaterial beams are analyzed by numerical simulation:one is the bean in which mass-spring systems with linearly varying elastic coefficients are uniformly distributed, and the other is the bean in which four identical absorber subgroups composed of spring-damper subsystems with linearly varying natural frequenciesare uniformly distributed. The results reveal that the mechanical wave transmitted in the metamaterial beam is absorbed by resonating with spring-mass absorbers, which verifies the effectivity of the proposed metamaterial beam on mechanical wave absorption.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here