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Wen Jihong
Yu Dianlong
Wang Gang
Zhao Hongang
Liu Yaozong
College of Mechatronics Engineering
and Automation,
National University of Defense
Technology,
Changsha 410073, China |
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THEORY AND
EXPERIMENTAL
INVESTIGATION OF FLEXURAL WAVE
PROPAGATION IN THIN
RECTANGULAR PLATE WITH
PERIODIC STRUCTURE*
Abstract:
With the idea of the phononic crystals, a thin rectangular plate with two-dimensional periodic structure is designed. Flexural wave band structures of such a plate with infinite structure are calculated with the plane-wave expansion (PWE) method, and directional band gaps are found in the ΓX direction. The acceleration frequency response in the ΓX direction of such a plate with finite structure is simulated with the finite element method and verified with a vibration experiment. The frequency ranges of sharp drops in the calculated and measured acceleration frequency response curves are in basic agreement with those in the band structures. Thin plate is a widely used component in the engineering structures. The existence of band gaps in such periodic structures gives a new idea in vibration control of thin plates.
Key words:
Phononic crystals Flexural wave band gaps Thin rectangular plate |