Comparison of Damage and Undamaged Mechanical Structure using free vibration Analysis
Keywords:
Free Vibration, Structural Health Monitoring, Undamaged, Damaged StructureAbstract
The current paper is about an experimental study of a free vibration and response of a mechanical structure. The comparison is drawn by showing the response of an undamaged and damaged mechanical structure. Damages are detected by analyzing the dynamic response of the structure. Vibration patterns of a damaged structure are different from the undamaged structure. First vibration pattern of an undamaged structure is analyzed and recorded. Then vibration pattern of a damaged structure is recorded, both of the patterns are compared to find out the intensity of damage caused by vibration. Three depth cases for crack are considered. Crack with 10mm, 20mm, and 30mm depth respectively. Transducers (accelerometers) record the data of the vibrating structure. The free vibration is given to the structure by striking the structure with a hammer to record the data. The natural frequency tends to get reduced as the crack depth increases Common frequencies assume an essential part in the damage recognition. The frequency of a damaged structure is lowered by reduction of stiffness and material degradation. With the help of vibration patterns and change in natural frequencies, it is easy to monitor the health of the structure and to detect the damage at the right time, in order to take safety precautions before the structure goes to failure.
Downloads
Published
How to Cite
Issue
Section
License
Authors who publish with this journal agree to the following terms:- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
