Acta Mechanica Solida Sinica

, Volume 23, Issue 3, pp 255–259 | Cite as

Phononic Band Gaps in Two-Dimensional Hybrid Triangular Lattice

  • Bin Wu
  • Ruiju Wei
  • Huanyu Zhao
  • Cunfu He


Absolute phononic band gaps can be substantially improved in two-dimensional lattices by using a symmetry reduction approach. In this paper, the propagation of elastic waves in a two-dimensional hybrid triangular lattice structure consisting of stainless steel cylinders in air is investigated theoretically. The band structure is calculated with the plane wave expansion (PWE) method. The hybrid triangular Bravais lattice is formed by two kinds of triangular lattices. Different from ordinary triangular lattices, the band gap opens at low frequency (between the first and the second bands) regime because of lifting the bands degeneracy at high symmetry points of the Brillouin zone. The location and width of the band gaps can be tuned by the position of the additional rods.

Key words

phononic crystal phononic band gap hybrid triangular lattice plane wave expansion method 


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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2010

Authors and Affiliations

  1. 1.College of Mechanical Engineering and Applied Electronics TechnologyBeijing University of TechnologyBeijingChina
  2. 2.College of Mathematics and PhysicsShandong Jianzhu UniversityJinanChina

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