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第 29 卷第 2 期煤矿机械 Vol 29No 2
2008 年 2 月 Coal Mine Machinery Feb. 2008
泡沫铝填充钢管构件阻尼性能的试验研究 2
邵国鑫1 , 屠永清1 , 沈洪2
(1 北京航空航天大学, 北京 100083 ; 2 北京城建设计研究总院, 北京 100037)
摘要: 针对泡沫铝填充钢管试件,采用锤击试验法进行模态参数识别,得出试件的前 4 阶模态
阻尼比,采用最小二乘法确定构件的比例阻尼系数,与空钢管试件对比,填充泡沫铝的钢管试件在模
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态阻尼比和比例阻尼系数上都有显著的提高。其中,填充开孔泡沫铝的钢管试件提高最为明显。
关键词: 泡沫铝; 参数识别; 阻尼比; 比例阻尼系数
中图分类号文献标志码文章编号( )
3 3 : TU398 3 : A :1003 0794 2008 02 0049 04
Test Study on Damping Properties2 of Foamed Aluminum Filled Steel
Tubes
SHAO Guo - xin1 , TU Yong - qing1 , SHEN Hong2
(1. Beijing Aerospace University , Beijing 100083 ,China ;2. Beijing Urban Engineering Design and Research Institute ,Beijing 100037 ,China)
Abstract :The first four modal damping ratios of foamed aluminum filled steel tubes are determined with the ap
plication of the identification of performance parameters theory and the modal testing method of hammer im
pact. And their damping proportional coefficients are determined by means of the method of least squares. By
comparing with the empty steel tubes ,the results show that the modal damping ratios and the damping propor
tional coefficients of foamed aluminum filled steel tubes enhance remarkably. And the ones filled with porous
foamed aluminum increase most remarkably.
Key words :foamed aluminum ; identification of performance parameter ; damping r