Abstract
In a companion paper the phenomenon of flexural-longitudinal wave coupling in an infinite dual-beam periodic structure with transverse connection is investigated. The remarkable finding obtained that there was such a periodic structure which conveyed fundamentally three symmetric and three antisymmetric characteristic coupled waves. In this paper, a methodology is proposed to realize the direct identification of characteristic waves from the responses of a finite periodic structure. This represents a considerable departure from traditional methods, in which the assumption of infinite dimension of a periodic structure is implied. It is the inverse process of the traditional studies which obtain characteristic wave-types based on the assumption and then continue the studies with the wave-types. A general expression for the individual transition matrix of one periodic element is defined and derived from two adjacent junction-mobilities of a finite periodic structure. A common transition matrix for all elements is then constructed using responses based on the mathematical analysis of the relations between responses or junction-mobilities, individual transition matrices and characteristic wave-types. Finally, a specific experimental structure and approach was designed to extract the characteristic waves from the responses. All the symmetrical and antisymmetrical characteristic wave-types, except the pairing of near-field wave-types, are extracted from the common transition matrix of the finite periodic structure, demonstrating the feasibility of the method presented.
Original language | English |
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Pages (from-to) | 1406-1414 |
Number of pages | 9 |
Journal | JVC/Journal of Vibration and Control |
Volume | 18 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 Aug 2012 |
Keywords
- Characteristic wave-types
- dual-layer structure
- periodic structure
- transition matrix
- transverse connection
ASJC Scopus subject areas
- General Materials Science
- Automotive Engineering
- Aerospace Engineering
- Mechanics of Materials
- Mechanical Engineering