Environmental variability of modal properties

被引：206

作者：

Cornwell, P ^{[1
]}

Farrar, CR

Doebling, SW

Sohn, H

机构：

[1] Rose Hulman Inst Technol, Terre Haute, IN 47803 USA

[2] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

EXPERIMENTAL TECHNIQUES | 1999年 / 23卷 / 06期

关键词：

D O I：

10.1111/j.1747-1567.1999.tb01320.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The variability of modal frequencies with temperature of a single span of a bridge is presented. The modal frequencies are found to vary by up to 6% over a 24-hour period. This variation is found to be correlated to the temperature differential across the deck. Bootstrap analyses of the 30 FRF samples that are analyzed to estimate a resonant frequency value revealed that variability associated with the measurement process and data reduction process is not as significant as the variability produced by the temperature differential across the deck.

引用

页码：45 / 48

页数：4