土木工程  >> Vol. 3 No. 6 (November 2014)

大型振动台阵的振动影响实测研究
Site Test on Vibration Influence Induced by Large Scale Shaking Table Array

DOI: 10.12677/HJCE.2014.36024, PDF, HTML, 下载: 1,838  浏览: 4,151 

作者: 何 汛, 李广振, 任晓崧, 宗 刚:同济大学,土木工程学院结构工程与防灾研究所,上海

关键词: 四点振动台阵脉动测试地表振动衰减率阻尼比Shaking Table Array Ground Borne Vibration Test Attenuation Rate of Ground Vibration Damping Ratio

摘要: 为研究某大型土木实验室内四点振动台阵正常运行所致的振动影响,对实验室内部和外部进行表面加速度的实地测试。测试内容主要分为两个时段,一是设备静止时段,二是设备运行时段,两个振动台满布刚性质量,最大加载质量接近60 T,施加1~40 Hz的多条正弦波激励,最大水平加速度0.5 g。根据室内外各测点的表面加速度振动衰减曲线的实测结果,得到了不同频率下的基础结构阻尼比,验证了大质量刚性基础减振方案的有效性。
Abstract: In order to evaluate the effect of vibration induced by large scale shaking table array, site test on the ground vibration acceleration was done inside and outside the civil lab. Two conditions, as no table working and 2 tables working with sines input of different frequencies from 1 to 40 Hz and peak acceleration of 0.5 g are included. By vibration attenuation curve from the test result, the damping ratio of different frequency is got and the effectiveness of the large mass stiffness is also verified for vibration reduction.

文章引用: 何汛, 李广振, 任晓崧, 宗刚. 大型振动台阵的振动影响实测研究[J]. 土木工程, 2014, 3(6): 196-206. http://dx.doi.org/10.12677/HJCE.2014.36024

参考文献

[1] 任晓崧 (2013) 对于大型土木实验室建设的认识—以同济大学新建多功能振动试验中心项目为例. 实验室研究与探索, 23, 178-181.
[2] 陶余飞 (2012) 非固定多点激励条件下的大型动力基础振动影响分析. 硕士论文, 同济大学, 上海.
[3] Ren, X.S., Tao, Y.F. and Zhou, B. (2013) Study on vibration induced by the shaking tables array in large scale civil lab. Proceedings of the 13th East Asia-Pacific Conference on Structural Engineering & Construction (EASEC-13), 11-13 September 2013, Sapporo, 8 p.
[4] 葛哲学, 陈仲生 (2006) MATLAB时频分析技术及其应用. 人民邮电出版社, 北京, 2-5, 66-82.
[5] Boashash, B. (2003) Time frequency signal analysis and processing. Library of Congress Cataloging in Publication Data.
[6] Papandreou-Suppappola, A. (2003) Applications in time-frequency signal processing. CRC Press LLC, Boca Raton.
[7] Auger, F., Flandrin, P., Goncalves, P. and Lemoine, O. (1995) Time-frequency toolbox.
[8] (1983) 动力机器基础设计手册. 建筑工业出版社, 北京.