Review of damage detection methods based on modal parameters

Subject Areas : Modal Analysis

Ehsan  Jamshidi ¹ (مدیر گروه مکانیک جامدات و طراحی کاربردی، عضو هیات علمی)
Bahram  Jamshidi ² (Department of Mechanical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran)
Fatemeh  Taghi Khaki ³ (Department of Mechanical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran)
Alireza  Arghavan ⁴ (Strategic Center for Energy and Sustainable Development, Semnan Branch, Islamic Azad University, Semnan, Iran)

Received: 2016-07-21 Accepted : 2016-07-21 Published : 2016-05-21

Keywords: Mode Shape, Natural frequency, Objective function, Damage Detection, Modal parameters, Flexibility Matrix, Curvature Mode Shape,

Abstract :

One of the common methods of structural damage detections and identification of location and severity of the damage in structures is investigation of changes in modal parameters before and after damage. These methods which are mostly based on optimization techniques use an objective function based on natural frequencies and mode shapes. This paper reviews previous researches in damage detection techniques based on modal parameters and common objective functions used in the optimization stage in the damage detection process. To this end, damage detection methods based on natural frequency, mode shape, curvature mode shape and both of mode shape and natural frequency are reviewed. In the following, due to high importance of objective function in the damage detection process, objective functions based on modal assurance criterion, flexibility matrix and natural frequency and mode shapes are compared