Numerical Analysis for Acoustic Resonance of One-Dimensional Nonlinear Elastic Bar
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概要
- 論文の詳細を見る
The free vibration acoustic resonance of a one-dimensional nonlinear elastic bar has been studied within a framework of the calculus of variation. The one-dimensional deformation function is expanded by a complex Fourier series, and the coefficients as well as the resonance frequency are determined from a direct analysis based on the Ritz method. This numerical analysis revealed that the elastic bar shows prominent nonlinear features such as the amplitude dependence of resonance frequency and the small oscillation of pseudo-nodal points. From a spectral analysis for the first resonant vibration mode, we confirmed nonlinear excitations of high-frequency and/or high-wave-number vibration modes. The mechanism of the mode selection is discussed.
- 2011-07-25
著者
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Shibutani Yoji
Department Of Mechanical Engineering And Systems Osaka University
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Tarumi Ryuichi
Department Of Mechanical Engineering Osaka University
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Matsuhisa Tomohiro
Department of Mechanical Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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Shibutani Yoji
Department of Mechanical Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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Tarumi Ryuichi
Department of Mechanical Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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