DIAGNOSTIC OF MECHANICAL SYSTEMS
Academic year and teacher
If you can't find the course description that you're looking for in the above list,
please see the following instructions >>
- Versione italiana
- Academic year
- 2015/2016
- Teacher
- GIORGIO DALPIAZ
- Credits
- 6
- Curriculum
- INDUSTRIALE
- Didactic period
- Primo Semestre
- SSD
- ING-IND/13
Training objectives
- The course provides the basic knowledge and methods for the condition monitoring and diagnostics of machinery and mechanical systems, by means of experimental vibration analysis. These methods are oriented to predictive maintenance and quality control. The course deals with the properties of mechanical systems, the instrumentation and the techniques for experimental vibration analysis and the specific techniques for the diagnostics of rotating machines; in particular rotor unbalance and faults in rolling bearings and gears are dealt with.
The course takes into account both the theoretical and the applicative point of view and includes numerical exercises and experimental demonstrations. Prerequisites
- Courses of Mathematics, Physics, Theoretical Mechanics and Mechanics of Machines.
Course programme
- The course lasts 48 hours, including lessons and exercises.
The course topics are the following.
Single degree-of-freedom systems. Damping. Free and forced vibrations. Rayleigh's method. Vibration isolation.
Two and multi degree-of-freedom systems. Eigenvalues and eigenvectors. Modal approach. Free and forced vibrations. Modelling mechanical systems by lumped parameter models.
Vibration measurements. Transducers and instrumentation. Signal processing in time, frequency and angular domains. Implementation in Matlab environment.
Dynamics and balancing of rotating machines.
Diagnostic techniques for rolling bearings and gears.
Experimental modal analysis. Didactic methods
- Theoretical and practical lectures; the practical lectures concern numerical exercises on vibration analysis, implementation of vibration processing techniques in Matlab environment, and experimental demonstrations.
Learning assessment procedures
- Written/oral examination. It consists in three questions: two questions are theoretical and methodological, mainly aimed at assessing the knowledge; one question is a numerical exercise, mainly aimed at checking skills in the procedures for vibration analysis. The questions are carried out in writing and are immediately corrected and discussed orally. The rating assigned to each question refers to both written and oral performances. The final grade is the average of the votes on the three questions. To pass the exam you must achieve a minimum final grade of 18/30.
Reference texts
- - Meneghetti, Maggiore, Funaioli, Lezioni di meccanica applicata alle macchine. Vol. 3: Dinamica e vibrazioni delle macchine, Pàtron, 2010.
- Rao, Mechanical Vibrations, 3rd ed., New York, Addison-Wesley, 1995.
- Thomson W., Theory of Vibration with Applications, 4th edition, New York, Chapman & Hall, 1993.
