VEHICLE VIBROACOUSTICS: SIMULATION
Academic year and teacher
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- Versione italiana
- Academic year
- 2022/2023
- Teacher
- FRANCESCO POMPOLI
- Credits
- 6
- Didactic period
- Secondo Semestre
- SSD
- ING-IND/11
Training objectives
- Provide advanced numerical methods for NVH (Noise Vibration and Harshness) and comfort issues in the automotive field.
Knowledge of acoustic and vibration propagation inside materials in order to design noise and vibration abatements in vehicles.
Simulate the dynamic behavior of mechanical systems by finite element analysis and multibody analysis. Prerequisites
- Vehicle NVH: Testing
Mechanical vibrations Course programme
- Overview of FEM / BEM / SEA simulation techniques for automotive applications;
FEM acoustic modeling for automotive applications (cockpit, silencers);
Advanced modeling of finite elements for dynamic analysis of automotive components such as car frames and critical components;
Theoretical models for predicting acoustic properties of porous and multilayer systems;
Vibration suppression (design and methods for experimental testing of vibration dampers);
Active noise control.
Laboratory: computer simulation activities with FEM software with automotive applications
Seminars: short seminars will be held during the course by automotive industry staff. Didactic methods
- The course includes: theoretical lectures carried out with the aid of multimedia systems, training for the use of vibro-acoustic simulation software, vibroacoustic simulation exercises of typical problems on vehicles; technical seminars held by specialists.
Expected products are: technical reports concerning the simulation exercises carried out; a presentation with slides to be presented orally in 15 minutes relating to the simulations carried out during the exercises. Learning assessment procedures
- The exam includes an oral test, in order to verify the understanding and application of the course content; the oral exam consists of two parts: a 15-minute oral speech regarding one numerical exercise assigned during the course, to be held in the classroom; an oral test regarding the course contents. The questions cover both vibrations and acoustics. Each part assigns a score from 18 to 30, the exam is passed if the score of the two parts is at least sufficient (18).
The final grade results from the arithmetic average of the votes obtained. Reference texts
- Lecture notes by teachers
Other recommended textbooks:
• Rao, Mechanical Vibrations, 5th ed., New York, Addison-Wesley.
• Noise and Vibration Analysis: Signal Analysis and Experimental Procedures, Anders Brandt, ISBN: 9780470746448.
• Random Vibration and Shock Testing, Wayne Tustin.
• Vibration monitoring, testing, and instrumentation, Clarence W. de Silva.
• Vibration damping of structural elements, C. T. Sun, Y. P. Lu
• Passive vibration isolation, Eugene I. Rivin
• Vibration damping, control, and design, Clarence W. de Silva
• Vibration: fundamentals and practice, Clarence W. de Silva
• Modal analysis, Jimin He and Zhi-Fang Fu
• Jean Allard, Noureddine Atalla, Propagation of Sound in Porous Media: Modelling Sound Absorbing Materials, John Wiley & Sons, 2009.
• S.Marburg, B. Nolte, Computational Acoustics of Noise Propagation in Fluids, Springer, 2008.
