A Frequency Domain Interpolation Method for Damping Ratio Estimation

被引：0

作者：

Xue, Jiawei ^{[1
]}

Diao, Ruipeng ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R China

来源：

2014 IEEE INTERNATIONAL CONFERENCE ON CONTROL SYSTEM COMPUTING AND ENGINEERING | 2014年

关键词：

damping ratio; damping factor; damped exponential signals; frequency domain interpolation; MODAL IDENTIFICATION;

D O I：

暂无

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

Damping ratio is usually needed for structure dynamics analysis. To improve the accuracy of damping ratio estimation and make it benefit for engineering application has been a difficult problem. A new method for the estimation of damping ratio which is necessary for structure dynamics analysis is presented. Under-damped free vibration response and damped exponential signals have the same expression. At first, the frequency spectrum of a damped exponential signal is obtained by Fast Fourier Transformation (FFT); then the damping factor and frequency deviation are calculated by frequency domain interpolation, which employ the ratio of two neighboring spectral samples. The damping ratio is easily determined from the definite relationship between the damping ratio and damping factor. Experiment shows the good accuracy, compared with traditional methods, proving the reliability of the proposed method in engineering application. Thus, this frequency domain interpolation method provides an alternative way for damping ratio estimation.

引用

页码：251 / 255

页数：5

共 13 条

[1] Extending the logarithmic decrement method to analyse two degree of freedom transient responses
Cooper, JE
[J]. MECHANICAL SYSTEMS AND SIGNAL PROCESSING, 1996, 10 (04) : 497 - 500
[2] An Interpolation Algorithm for Discrete Fourier Transforms of Weighted Damped Sinusoidal Signals
Diao, Ruipeng
Meng, Qingfeng
[J]. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2014, 63 (06) : 1505 - 1513
[3] AN APPROACH FOR REDUCING COMPUTATIONAL REQUIREMENTS IN MODAL IDENTIFICATION
IBRAHIM, SR
[J]. AIAA JOURNAL, 1986, 24 (10) : 1725 - 1727
[4] RANDOM DECREMENT TECHNIQUE FOR MODAL IDENTIFICATION OF STRUCTURES
IBRAHIM, SR
[J]. JOURNAL OF SPACECRAFT AND ROCKETS, 1977, 14 (11) : 696 - 700
[5] Jiangbo Y., 2009, J VIBRATION SHOCK, V28, P69
[6] Kuifu C., 2002, J MECH STRENGTH, V24, P510
[7] Richardson MH., 1982, P INT MODAL ANAL C, P167
[8] Ruipeng D., 2013, SIGN IM PROC APPL IC, P297
[9] ESTIMATION OF DAMPING FROM RESPONSE SPECTRA
SEYBERT, AF
[J]. JOURNAL OF SOUND AND VIBRATION, 1981, 75 (02) : 199 - 206
[10] Xiangdong H., 1990, J APPL MECH, V7, P109

← 1 2 →