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JOURNAL OF SYNTHETIC CRYSTALS ›› 2023, Vol. 52 ›› Issue (2): 261-270.

• Research Articles • Previous Articles     Next Articles

Effect of Boundary Load on Bandgaps of Elliptical Perforated-Hierarchical Panel Metamaterials

ZHANG Zujian, GUO Hui, WANG Xiaowei, YUAN Tao, SUN Pei   

  1. School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
  • Received:2022-10-08 Online:2023-02-15 Published:2023-03-08

Abstract: A hierarchical elliptical perforated-panel metamaterial (HEPMM) is proposed to investigate the effect of boundary load on its bandgaps (BGs). In this research, the boundary load was applied directly to the boundary of HEPMM, and the finite element method was adopted to study the effect of BGs with structural deformation which caused by the boundary load. Three-dimensional finite element models of different hierarchical elliptical perforated panels were established, and simplified into two-dimensional structure to investigate the in-plane bandgap characteristics conveniently. Then, the bandgap characteristics, transmission loss and different vibration modes of HEPMM with and without boundary load were simulated and analyzed. According to the results, the BGs frequencies are reduced by introducing hierarchy. Meanwhile, full BGs and directional BGs are additionally opened under boundary load, thus the propagation of elastic wave is suppressed effectively. The study provides a new idea to design perforated-panel metamaterial.

Key words: boundary load, hierarchy, elliptical perforated-panel, metamaterial, finite element method, bandgap

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