Modal displacement method for extracting the bending wave bandgap of plate-type acoustic metamaterials. (20th June 2019)

• Record Type: Journal Article
• Authors: Ma, Fuyin; Xu, Yicai; Wu, Jiu Hui
• Is Part Of: Applied physics express. Volume 12:Number 7(2019)
• Publication Date: 2019-06-20
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/1882-0786/ab27dd
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: To directly extract the bending wave bandgap of plate-type acoustic metamaterials, a modal displacement method is proposed. This method could replace the qualitative mode analysis with a quantitative statistical averaged mode displacement of the frame, in order to quantitatively extract the bandgap. Most importantly, the modal displacement method can reveal the mechanism behind a behavior wherein the mode evolution leads to the shifting of the upper edge of the bandgap—identifying this mechanism could correct misjudgment of the upper edge of the bending bandgap in the vibration mode analysis.