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Abstract: By analyzing the vibration band structure of infinite
periodic mass-spring structure, it is discovered that the structure have
vibration band gaps which are similar with elastic band structure of
phononic crystals, and the vibration of such frequencies within band
gaps can not be transmitted. Numerical calculation method is applied to
calculate the frequency response curve of finite periodic structure. The
influences of periodicity of mass-spring, material damping and the
characteristics of vibration isolation are discussed by using numerical
calculation method. Those conclusions come from numerical calculation
are examined by vibration experiment of two mass periodic mass-spring
structures, which results in reasonable agreements.
Key words: Phononic crystals Elastic band gap Vibration band gap
Vibration isolation
CLC No: O321
TH113 O48
国家973重大基础研究资助项目(51307).
Received 20040315, received in revised form 20020040920
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