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高温材料的阻尼特性实验研究
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国家自然科学基金(10672135);教育部新世纪优秀人才支持计划(NCET-04-0965)


Experimental Research on Damping Measurement of High-Temperature Materials
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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

    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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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.[Yang Zhichun, Wen Jinpeng, Li Bin, Sun Hao, 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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  • 收稿日期:2009-08-20
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