| Dynamic analytic model of mechanism with links fabricated from symmetric laminates |
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| 作者姓名： | 蔡敢为 常平平 马存志 王汝贵 李兆军 |
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| 作者单位： | College of Mechanical Engineering Guangxi University，College of Mechanical Engineering Guangxi University，College of Mechanical Engineering Guangxi University，College of Mechanical Engineering Guangxi University，School of Mechanical Science & Engineering Huazhong University of Science & Technology，Nanning 530004 China，Nanning 530004 China，Nanning 530004 China，Nanning 530004 China，Wuhan 430074 China |
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| 基金项目： | 国家自然科学基金;广西自然科学基金;教育部科学技术研究项目 |
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| 摘 要： | 1 INTRODUCTION The development of mechanology has a close connection with the invention and application of new materials, and the research on the application of new materials is very important in the domain of modern mechanology. It is one of the valid strategies for improving the elastodynamic properties of mechanical systems to exploit the advanced composite materials of which the high strength-to-weight ratios and damping properties are superior to those of the conventional metals. In 1…
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| 收稿时间： | 6 March 2006 |
| 修稿时间： | 5 May 2006 |
Dynamic analytic model of mechanism with links fabricated from symmetric laminates |
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| Cai Gan-wei , Chang Ping-ping , Ma Cun-zhi , Wang Ru-gui and Li Zhao-jun.Dynamic analytic model of mechanism with links fabricated from symmetric laminates[J].Journal of Central South University of Technology,2006,13(6):624-630. |
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| Authors: | Cai Gan-wei Chang Ping-ping Ma Cun-zhi Wang Ru-gui and Li Zhao-jun |
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| Affiliation: | (1) College of Mechanical Engineering, Guangxi University, Nanning, 530004, China;(2) School of Mechanical Science & Engineering, Huazhong University of Science & Technology, Wuhan, 430074, China |
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| Abstract: | A four-bar linkage mechanism with links fabricated from symmetric laminates was studied. The mass matrix of the beam element was obtained in light of the mass distribution characteristics of composite materials. The stiffness matrix of the beam element was derived from the constitutive equations of each layer and the relationship between the strain distribution and the node displacement of the beam element. The specific damping capacity of the beam element was analyzed according to the strain distribution of the beam element and the strain energy dissipation caused by vibration in each direction of each layer; and the damping coefficients were obtained according to the principle that the total energy dissipation of the beam element was equal to the work done by the equivalent damping force during a cycle of vibration, from which the damping matrix of the dynamic equations was obtained. Using the finite element method, the dynamic analytic model of the mechanism was obtained. The dynamic responses and natural frequency of the mechanism were obtained by simulation, respectively, and those of the simulation obtained by the proposed model were analyzed and compared with the results obtained by the conventional model. The work provides theoretical basis to a certain extent for the further research on nonlinear vibration characteristics and optimum design of this kind of mechanism. |
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| Keywords: | linkage mechanism finite element method composite materials damping dynamic analysis |
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