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Structural Engineering and Mechanics Volume 25, Number 1, January10 2007, pages 1-20 DOI: http://dx.doi.org/10.12989/sem.2007.25.1.001 |
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Characterization of the dynamic behavior of a linear guideway mechanism |
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Jyh-Cheng Chang, James Shih-Shyn Wu and Jui-Pin Hung
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| Abstract | ||
| Dynamic behaviors of the contact surface between ball and raceway in a guideway mechanism vary with the applied loads and hence affect the mechanical responses of machine tools. The study aims to investigate the nonlinear characteristics of dynamic behaviors at the rolling contact interface in linear guideway mechanisms. Firstly, analytical method was introduced to understand the contact behaviors based on Hertz contact theory in a point-to-point way. Then, the finite element approach with a three-dimensional surface-to-surface contact model and appropriate contact stiffness was developed to study the dynamic characteristics of such linear guideways. Finally, experiments with modal test were conducted to verify the significance of both the analytical and the numerical results. Results told that the finite element approach may provide significant predictions. The study results also concluded that the current nonlinear models based on Hertz | ||
| Key Words | ||
| linear guide; Hertz theory; contact stiffness. | ||
| Address | ||
| Jyh-Cheng Chang and James Shih-Shyn Wu; Institute of Mechanical Engineering, National Chung-Hsin Univeristy, 250, Kuo-Kuang Rd., Taichung, Taiwan 402, R.O.C. Jui-Pin Hung; Institute of Precision Machinery and Manufacturing Technology, National Chin-Yi Institute of Technology ,35, Lane.215, Sec. 1, Chung-Shan Rd., Taiping, 411, Taiwan, R.O.C. | ||