Modelling For Component Health Monitoring Based on Changes in Natural Frequencies
- When?
- Monday 16 July 2012, 10:00 to 11:00
- Where?
- 33 AB 03
- Open to:
- Students, Staff
- Speaker:
- S. K. Maiti G.K. Devarajulu Chair Professor of Mechanical Engineering IIT Bombay Mumbai 400076
Professor S.K. Maiti of IIT Bombay will be visiting the University of Surrey to deliver a talk on structural health monitoring
Abstract
This talk is concerned with the theoretical foundation of methods of crack detection based on measurements of changes in natural frequencies.
The analytical formulations that serve as the basis for detecting single or multiple cracks in machine or structural components will be discussed. The structural components can have a variety of geometries and be in the form of long or short beams or shafts, with uniform or variable cross-section or ‘L’ frame with uniform cross-section.
It is also possible to handle external excitations giving rise to natural vibrations in transverse bending, or a combination of bending, torsion and axial vibrations. The structural components can be on simple supports, or continuous flexible supports, or discontinuous rigid or flexible supports, or a combination of all these.
The approach to be discussed has been verified by numerical studies and, wherever possible, laboratory experiments. The prediction of location and size of cracks has good accuracy, provided the crack size is greater than, or equal to, 10% of the section depth.
Directions for further investigations will also be indicated.
