PT  - JOURNAL ARTICLE
AU  - Jian-hua, Du
AU  - Zhiwei, Ouyang
AU  - Yangdong, Zhao
TI  - Damage Identification Method with Structural Frequency Data from Modal Test
DP  - 2009 Mar 31
TA  - Communications - Scientific Letters of the University of Zilina
PG  - 50--54
VI  - 11
IP  - 1
AID - 10.26552/com.C.2009.1.50-54
IS  - 13354205
AB  - Testing and analysis technology based on vibration mode is a common method to structural health monitoring and checking. This paper deduces the damage factor used for structural damage evaluation based on test frequency of structure, makes a finite element numerical simulation using ANSYS software and model test to a pressure pipe. Here a stiffness reduction method is utilized to reproduce the damage state of a single-point and multiple-point, damage identification is carried out with a FEM model of redundant pipe. Meanwhile, a model experiment system is designed to validate the efficiency of damage factor with cutting-groove to simulate damage states. Numerical and experimental results show the proposed damage factor is theoretically breviate, simple realization and high-accuracy performance, therefore, it has a good usage prospect in the implementation of structural damage monitoring and identification.