Structural damage detection by a sensitivity and statistical-based method
Structural damage detection by a sensitivity and statistical-based method
复制标题
DOI：
10.1006/jsvi.1998.1728
复制
发表时间：
1998-10-08
影响因子：
4.7
通讯作者：
Contursi, T
中科院分区：
文献类型：
--
作者：
Messina, A;Williams, EJ;Contursi, T
在过去的20年里，实验模态分析技术的发展促进了许多类型的结构模态参数的准确测量。除了这项工作，已经开发了几种方法来检测结构损伤，通过使用位置相关的模态参数的变化。本文通过介绍两种估算结构中缺陷尺寸的方法，扩展了作者在多损伤位置保证准则（MDLAC）相关系数方面的工作。它们的有效性示出了使用两个桁架结构的数值数据和位置和尺寸的算法进行了验证实验使用三梁测试结构。本文还介绍了一种提高损伤定位算法计算效率的方法。MDLAC的方法提供了实际的吸引力，只需要测量的几个结构的固有频率之间的未损坏和损坏的状态的变化，并被证明提供良好的预测的位置和绝对大小的损坏在一个或多个网站。(C)北京：科学出版社.
During the last 20 years, the development of experimental modal analysis techniques has facilitated the accurate measurement of modal parameters in many types of structure. Alongside this work, several methods have been developed to detect structural damage by using location-dependent changes in the modal parameters. The paper extends the authors' work on a correlation coefficient termed the Multiple Damage Location Assurance Criterion (MDLAC) by introducing two methods of estimating the size of defects in a structure. Their effectiveness is illustrated using numerical data for two truss structures and both location and sizing algorithms are validated experimentally using a three-beam test structure. The paper also introduces a means of improving the computational efficiency of the damage location algorithm. The MDLAC approach offers the practical attraction of only requiring measurements of the changes in a few of the structure's natural frequencies between the undamaged and damaged states and is shown to provide good predictions of both the location and absolute size of damage at one or more sites. (C) 1998 Academic Press.