Experimental investigation of 2d rainbow phononic crystals for broadband vibration attenuation

Han Meng, Dimitrios Chronopoulos, Nick Bailey, Zhuang Dong, Jian Yang

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review


Phononic crystals (PnCs) and metamaterials are nowadays widely investigated for vibration suppression owing to their stopbands that prohibit wave propagation. The application of PnCs and metamaterials is however limited by their narrow bandgaps especially for low frequencies. The recently introduced rainbow metamaterials composed of spatially varied oscillating unit cells are found to generate broader bandgaps than the periodic structures. 2D rainbow PnCs consisting of cubic blocks with internal voids connected by curved beam are proposed in the present paper. Masses of the cubic blocks differ due to different dimensions of internal voids. To prove the effects of rainbow design, two 2D block-beam lattice structures, with periodic and nonperiodic units respectively, were manufactured by additive manufacturing method. Frequency response functions of the manufactured PnCs were measured with a testing system containing a mechanical shaker, an impedance head and a laser Doppler vibrometer. Receptance functions of the PnCs in two directions were measured separately. The obtained experimental results show that the PnC with rainbow mass has extended bandgaps compared with the periodic one.

Original languageEnglish
Title of host publicationEURODYN 2020 - 11th International Conference on Structural Dynamics, Proceedings
EditorsManolis Papadrakakis, Michalis Fragiadakis, Costas Papadimitriou
PublisherEuropean Association for Structural Dynamics
Number of pages8
ISBN (Electronic)9786188507210
Publication statusPublished - 2020
Event11th International Conference on Structural Dynamics, EURODYN 2020 - Virtual, Athens, Greece
Duration: 23 Nov 202026 Nov 2020

Publication series

NameProceedings of the International Conference on Structural Dynamic , EURODYN
ISSN (Print)2311-9020


Conference11th International Conference on Structural Dynamics, EURODYN 2020
CityVirtual, Athens


  • 2D phononic crystal
  • Additive manufacturing
  • Experimental
  • Rainbow
  • Stopbands

ASJC Scopus subject areas

  • Building and Construction
  • Architecture
  • Civil and Structural Engineering


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