Open AccessExact Damage Identification of Plate-Like Structure using Mode Shapes
Author(s) -
Siva Sankara Babu Chinka,
Gulshan Kumari,
M. Guna Sahithi,
S. Mahesh,
Madan Mohan
Publication year - 2020
Publication title -
international journal of innovative technology and exploring engineering
Language(s) - English
Resource type - Journals
ISSN - 2278-3075
DOI - 10.35940/ijitee.f4066.049620
Subject(s) - finite element method , modal , structural engineering , modal analysis , normal mode , mode (computer interface) , transverse plane , sensitivity (control systems) , acoustics , materials science , engineering , computer science , physics , composite material , vibration , electronic engineering , operating system
In this paper, Mode Shape Based Damaged Detection Technique (MSBDT) has been applied for plate-like structures to recognize the damage location and quantify the damage length. Two alternative approaches are exclusively used to extract damage indexes through mode shapes of undamaged plate (i.e. reference data) and damaged plate. The absolute difference of mode shapes used in first approach and mode shape curvatures used in second approach of undamaged and damaged plates. Healthy Aluminium plate was tested in the laboratory for accurate material properties and considered three different damage cases by changing the crack orientation and location for successfully implementation of above approaches. In order to make certain the sensitivity of the proposed approaches, natural frequencies and corresponding mode shapes for first six modes in transverse direction of a plate are obtained by Finite Element Modal Analysis (FEMA) in ANSYS 18.1 and validated by Experimental Modal Analysis (EMA) in virtual instrumentation environment using LabView software.