| 高温材料的阻尼特性实验研究 |
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| 引用本文： | 杨智春,温金鹏,李 斌,孙 浩,刘金利.高温材料的阻尼特性实验研究[J].稀有金属材料与工程,2010,39(8):1360-1364. |
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| 作者姓名： | 杨智春 温金鹏 李 斌 孙 浩 刘金利 |
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| 作者单位： | 西北工业大学,陕西,西安,710072 |
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| 基金项目： | 国家自然科学基金，教育部新世纪优秀人才支持计划 |
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| 摘 要： | 采用双悬臂梁试件，通过基础激励下的共振驻留法，开发了一套高温材料在真空环境下的阻尼测试系统。研究了提高测试精度的方法，并分析了空气阻尼对阻尼测试结果的影响，并以Ti-6-4合金为对象，研究了阻尼随温度、应变幅值及振动频率的变化规律
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| 关 键 词： | 材料阻尼 共振驻留 双悬臂梁 |
| 收稿时间： | 2009/8/20 0:00:00 |
Experimental Research on Damping Measurement of High-Temperature Materials |
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| Yang Zhichun,Wen Jinpeng,Li Bin,Sun Hao and Liu Jinli.Experimental Research on Damping Measurement of High-Temperature Materials[J].Rare Metal Materials and Engineering,2010,39(8):1360-1364. |
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| Authors: | Yang Zhichun Wen Jinpeng Li Bin Sun Hao and Liu Jinli |
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| Affiliation: | Yang Zhichun,Wen Jinpeng,Li Bin,Sun Hao,Liu Jinli(Northwestern Polytechnical University,Xi'an 710072,China) |
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| Abstract: | A damping measurement system was developed for high temperature materials using double-reed cantilever specimens by means of resonant-dwell under base excitation in a high-temperature and vacuum environment. Some methods were proposed to improve the accuracy of damping measurement. The effect of air damping on damping tested results was analyzed. The damping of Ti-6-4 alloy was tested by the system and the relationships of material damping to temperature, strain amplitude and vibration frequency were studied. Results show that air damping has a significant effect on the damping of materials. The damping of Ti-6-4 alloy keeps constant and the vibration frequency has little effect on it below 400 oC. However, it increases rapidly with temperature elevation above 400 oC and the vibration frequency has a complicated effect on it. The effect of strain amplitude on the damping of Ti-6-4 alloy can be neglected in the temperature range from 25 to 600 oC |
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| Keywords: | material damping resonant-dwell double-reed cantilever |
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