This paper studies the dispersion characteristics of guided waves in layered finite media, surface waves in layered semi-infinite spaces, and Stoneley waves in layered infinite spaces. Using the precise integration method (PIM) and the Wittrick–Williams (W-W) algorithm, three methods that are based on the dynamic stiffness matrix, symplectic transfer matrix, and mixed energy matrix are developed to compute the dispersion relations. The dispersion relations in layered media can be reduced to a standard eigenvalue problem of ordinary differential equations (ODEs) in the frequency-wavenumber domain. The PIM is used to accurately solve the ODEs with two-point boundary conditions, and all of the eigenvalues are determined by using the eigenvalue counting method. The proposed methods overcome the difficulty of seeking roots from nonlinear transcendental equations. In theory, the three proposed methods are interconnected and can be transformed into each other, but a numerical example indicates that the three methods have different levels of numerical stability and that the method based on the mixed energy matrix is more stable than the other two methods. Numerical examples show that the method based on the mixed energy matrix is accurate and effective for cases of waves in layered finite media, layered semi-infinite spaces, and layered infinite spaces.
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June 2019
Research-Article
Stable and Accurate Computation of Dispersion Relations for Layered Waveguides, Semi-Infinite Spaces and Infinite Spaces
Q. Gao,
Q. Gao
Faculty of Vehicle Engineering and Mechanics,
State Key Laboratory of Structural Analysis for
Industrial Equipment,
Department of Engineering Mechanics,
Dalian University of Technology,
Dalian 116023, China
e-mail: qgao@dlut.edu.cn
State Key Laboratory of Structural Analysis for
Industrial Equipment,
Department of Engineering Mechanics,
Dalian University of Technology,
Dalian 116023, China
e-mail: qgao@dlut.edu.cn
Search for other works by this author on:
Y. H. Zhang
Y. H. Zhang
Faculty of Vehicle Engineering and Mechanics,
State Key Laboratory of Structural Analysis for
Industrial Equipment,
Department of Engineering Mechanics,
Dalian University of Technology,
Dalian 116023, China
e-mail: zyh0826@mail.dlut.edu.cn
State Key Laboratory of Structural Analysis for
Industrial Equipment,
Department of Engineering Mechanics,
Dalian University of Technology,
Dalian 116023, China
e-mail: zyh0826@mail.dlut.edu.cn
Search for other works by this author on:
Q. Gao
Faculty of Vehicle Engineering and Mechanics,
State Key Laboratory of Structural Analysis for
Industrial Equipment,
Department of Engineering Mechanics,
Dalian University of Technology,
Dalian 116023, China
e-mail: qgao@dlut.edu.cn
State Key Laboratory of Structural Analysis for
Industrial Equipment,
Department of Engineering Mechanics,
Dalian University of Technology,
Dalian 116023, China
e-mail: qgao@dlut.edu.cn
Y. H. Zhang
Faculty of Vehicle Engineering and Mechanics,
State Key Laboratory of Structural Analysis for
Industrial Equipment,
Department of Engineering Mechanics,
Dalian University of Technology,
Dalian 116023, China
e-mail: zyh0826@mail.dlut.edu.cn
State Key Laboratory of Structural Analysis for
Industrial Equipment,
Department of Engineering Mechanics,
Dalian University of Technology,
Dalian 116023, China
e-mail: zyh0826@mail.dlut.edu.cn
1Corresponding author.
Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received January 12, 2018; final manuscript received January 14, 2019; published online March 4, 2019. Assoc. Editor: Mahmoud Hussein.
J. Vib. Acoust. Jun 2019, 141(3): 031012 (16 pages)
Published Online: March 4, 2019
Article history
Received:
January 12, 2018
Revised:
January 14, 2019
Citation
Gao, Q., and Zhang, Y. H. (March 4, 2019). "Stable and Accurate Computation of Dispersion Relations for Layered Waveguides, Semi-Infinite Spaces and Infinite Spaces." ASME. J. Vib. Acoust. June 2019; 141(3): 031012. https://doi.org/10.1115/1.4042708
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