| 弹性机构振动被动控制中模态损耗因子的确定 |
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| 引用本文： | 张宪民. 弹性机构振动被动控制中模态损耗因子的确定[J]. 机械工程学报, 1999, 35(3) |
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| 作者姓名： | 张宪民 |
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| 作者单位： | 汕头大学机电系 |
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| 基金项目： | 国家自然科学基金,广东省自然科学基金 |
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| 摘 要： | 针对组成弹性机构的特点，给出了一种描述组成弹性机构的２节点８自由度约束阻尼平面刚架单元的形函数，建立了含大阻尼材料时弹性机构的动力学方程，基于此研究了弹性连杆机构模态损耗因子的预测问题。文中方法概念清晰、计算简单、预测可靠。可用于解决阻尼处理中的机构结构参数的优化设计问题。
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| 关 键 词： | 弹性机构 振动控制 阻尼 模态损耗因子 |
MODAL LOSS FACTOR PREDICATION IN THE PASSIVE VIBRATION CONTROL OF ELASTIC MECHANISM SYSTEMS |
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| Zhang Xianmin. MODAL LOSS FACTOR PREDICATION IN THE PASSIVE VIBRATION CONTROL OF ELASTIC MECHANISM SYSTEMS[J]. Chinese Journal of Mechanical Engineering, 1999, 35(3) |
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| Authors: | Zhang Xianmin |
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| Affiliation: | Shantou University |
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| Abstract: | According to the characteristics of the flexible mechanism systems, an efficient method is presented for finite element modeling of three layer frame element containing a viscoelastic layer. The shape functions for the two node and eight degrees of freedom frame element are presented. The equations of motion of the damped flexible mechanism are derived. Modal damping ratios are predicated from undamped normal mode by means of the modal strain energy method. Comparisons between the results obtained by this paper and the results obtained by exact solution of the governing equations demonstrate that the presented method is correct, efficient and reliable. It is believed that the method had the potential for optimal design for damped flexible mechanism systems |
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| Keywords: | Flexible mechanism Vibration control Damping Modal loss factor |
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