Flexural Vibration Analysis of Nonuniform Double-Beam System with General Boundary and Coupling Conditions
In this paper, an analytical modeling approach for the flexural vibration analysis of the nonuniform double-beam system is proposed via an improved Fourier series method, in which both types of translational and rotational springs are introduced to account for the mechanical coupling on the interfac...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2018/5103174 |
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| _version_ | 1832545424374759424 |
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| author | Lujun Chen Deshui Xu Jingtao Du Chengwen Zhong |
| author_facet | Lujun Chen Deshui Xu Jingtao Du Chengwen Zhong |
| author_sort | Lujun Chen |
| collection | DOAJ |
| description | In this paper, an analytical modeling approach for the flexural vibration analysis of the nonuniform double-beam system is proposed via an improved Fourier series method, in which both types of translational and rotational springs are introduced to account for the mechanical coupling on the interface as well as boundary restraints. Energy formulation is employed for the dynamic description of the coupling system. With the aim to treat the varying thickness across the beam in a unified pattern, the relevant variables are all expanded into Fourier series. Supplementary terms with the smoothed characteristics are introduced to the standard Fourier series for the construction of displacement admissible function for each beam. In conjunction with the Rayleigh–Ritz procedure, the transverse modal characteristics of nonuniform double-beam system can be obtained by solving a standard eigenvalue problem. Instead of solving the certain value of nonideal boundary conditions, the continuous spring stiffnesses of the boundary conditions are considered, and the rotational restrains are introduced in the coupling beam interface. Numerical results are then presented to demonstrate the reliability of the current model and study the influence of various parameters, such as taper ratio, boundary, and coupling strength on the free vibration characteristics, with the emphasis put on the rotational restraining coefficients on the beam interface. This work can provide an efficient modeling framework for the vibration characteristics study of the complex double-beam system, especially with arbitrary varying thickness and coupling stiffness. |
| format | Article |
| id | doaj-art-34202075bd30482a85b28aba7e52d56e |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-34202075bd30482a85b28aba7e52d56e2025-02-03T07:25:50ZengWileyShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/51031745103174Flexural Vibration Analysis of Nonuniform Double-Beam System with General Boundary and Coupling ConditionsLujun Chen0Deshui Xu1Jingtao Du2Chengwen Zhong3School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, ChinaCollege of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, ChinaSchool of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, ChinaIn this paper, an analytical modeling approach for the flexural vibration analysis of the nonuniform double-beam system is proposed via an improved Fourier series method, in which both types of translational and rotational springs are introduced to account for the mechanical coupling on the interface as well as boundary restraints. Energy formulation is employed for the dynamic description of the coupling system. With the aim to treat the varying thickness across the beam in a unified pattern, the relevant variables are all expanded into Fourier series. Supplementary terms with the smoothed characteristics are introduced to the standard Fourier series for the construction of displacement admissible function for each beam. In conjunction with the Rayleigh–Ritz procedure, the transverse modal characteristics of nonuniform double-beam system can be obtained by solving a standard eigenvalue problem. Instead of solving the certain value of nonideal boundary conditions, the continuous spring stiffnesses of the boundary conditions are considered, and the rotational restrains are introduced in the coupling beam interface. Numerical results are then presented to demonstrate the reliability of the current model and study the influence of various parameters, such as taper ratio, boundary, and coupling strength on the free vibration characteristics, with the emphasis put on the rotational restraining coefficients on the beam interface. This work can provide an efficient modeling framework for the vibration characteristics study of the complex double-beam system, especially with arbitrary varying thickness and coupling stiffness.http://dx.doi.org/10.1155/2018/5103174 |
| spellingShingle | Lujun Chen Deshui Xu Jingtao Du Chengwen Zhong Flexural Vibration Analysis of Nonuniform Double-Beam System with General Boundary and Coupling Conditions Shock and Vibration |
| title | Flexural Vibration Analysis of Nonuniform Double-Beam System with General Boundary and Coupling Conditions |
| title_full | Flexural Vibration Analysis of Nonuniform Double-Beam System with General Boundary and Coupling Conditions |
| title_fullStr | Flexural Vibration Analysis of Nonuniform Double-Beam System with General Boundary and Coupling Conditions |
| title_full_unstemmed | Flexural Vibration Analysis of Nonuniform Double-Beam System with General Boundary and Coupling Conditions |
| title_short | Flexural Vibration Analysis of Nonuniform Double-Beam System with General Boundary and Coupling Conditions |
| title_sort | flexural vibration analysis of nonuniform double beam system with general boundary and coupling conditions |
| url | http://dx.doi.org/10.1155/2018/5103174 |
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