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http://dx.doi.org/10.5050/KSNVN.2009.19.2.119

Proposition to Natural Frequency of Liquid Column Vibration Absorber with Vertical-horizontal Area Ratio  

Woo, Sung-Sik (단국대학교 건축공학과)
Chung, Lan (단국대학교 건축공학과)
Lee, Joung-Woo (단국대학교 건축공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.19, no.2, 2009 , pp. 119-126 More about this Journal
Abstract
LCVA has an advantage that its natural frequency can be easily controlled by changing the area ratio of the vertical column and horizontal part. The previous studies investigated the dynamic characteristics of the LCVA under harmonic load. This study experimentally obtained the first and second mode natural frequencies of the LCVA from shaking table tests using white noise and compared the values with the ones by previous study. Test results show that the measured first mode natural frequency of the LCVA has a different value compared with calculated one. The effective length($L_e$) was revised using by power equation. In the case01 to 19, the standard deviation($S_r$) is 4.7292 and the coefficient of correlation(r) is 0.9856. In the case21 to 61, the standard deviation($S_r$) is 14.2143 and the coefficient of correlation(r) is 0.9935. The second mode frequency increases with the increasing area ratio, which is due to the sloshing motion effect resulting from the large area of the vertical column.
Keywords
Liquid Column Vibration Absorber; Shaking Table Test; Natural Frequency; Regression Analysis;
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