Frequency-Domain Substructure Isolation for Local Damage Identification
Frequency-Domain Substructure Isolation for Local Damage Identification
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DOI：
10.1260/1369-4332.18.1.137
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发表时间：
2015-01-01
影响因子：
2.6
通讯作者：
Ou, Jinping
中科院分区：
文献类型：
--
作者：
Hou, Jilin;Jankowski, Lukasz;Ou, Jinping
提出了一种基于子结构隔震法的局部健康监测子结构识别频域方法。SIM的第一个关键步骤是孤立子结构的数值构造，孤立子结构是与真实的子结构具有相同物理参数的虚拟独立结构。损伤识别和局部监测，然后可以使用简单的孤立子结构的响应和任何经典的方法，最初针对全球结构分析。本文将SIM扩展到频域，这使得该方法的计算效率与时域相比显着提高。采用质点-弹簧数值模型对该方法进行了介绍。两个铝梁具有相同的子结构，然后在实验验证。在这两种情况下，该方法都有效且准确地执行。
This paper proposes a frequency-domain method of substructure identification for local health monitoring using substructure isolation method (SIM). The first key step of SIM is the numerical construction of the isolated substructure, which is a virtual and independent structure that has the same physical parameters as the real substructure. Damage identification and local monitoring can be then performed using the responses of the simple isolated substructure and any of the classical methods aimed originally at global structural analysis. This paper extends the SIM to frequency domain, which allows the computational efficiency of the method to be significantly increased in comparison to time domain. The mass-spring numerical model is used to introduce the method. Two aluminum beams with the same substructure are then used in experimental verification. In both cases the method performs efficiently and accurately.