Course detail

Vibration and Noise of Vehicles

FSI-QDZ-A Acad. year: 2027/2028 Summer semester

The course addresses the generation, transmission, analysis and mitigation of vibration and noise in vehicles and their components. It introduces the physical principles of mechanical vibration, vibroacoustic signal processing and sound propagation. Analytical methods and the finite element method (FEM) are applied to modal, harmonic response and acoustic analyses. Applications include rotor dynamics, elastomeric components, journal and rolling-element bearings, turbochargers, internal combustion engines, electric powertrains and vehicle NVH under operating conditions. Emphasis is placed on physical understanding, linking simulation and measurement, assessing the reliability of results and proposing engineering countermeasures. The opportunities and limitations of AI tools may be introduced during computer-based classes.

Language of instruction

English

Number of ECTS credits

6

Supervisor

prof. Ing. Pavel Novotný, Ph.D.

Department

Institute of Automotive Engineering

Entry knowledge

Bachelor-level mathematics (linear algebra, differential and integral calculus, differential equations), kinematics, dynamics, elasticity and strength of materials are expected. Prior familiarity with structural FEM and commercial CAE software, as developed in the course Simulations in the Automotive Industry, is advantageous.

Rules for evaluation and completion of the course

The course is completed by a course-unit credit and an examination. Credit requires attendance at compulsory computer-based classes and completion of assigned practical work; replacement of missed activities is arranged by the teacher. Assessment comprises continuous lecture-related tests, an individual analytical or numerical practical task including critical interpretation, a written theoretical test, written calculation problems and an oral part assessing the ability to apply knowledge in broader contexts. Participation in individual points-bearing components is voluntary; non-participation yields no points for that component. Admission to the oral part may require a minimum performance in preceding components; students may also finalise assessment without the oral part. Successful completion requires the course-unit credit and the overall passing standard. Grading and organisational rules must be communicated before teaching begins in accordance with the binding course documentation. AI tools are prohibited in continuous tests and all examination components. AI may be used exclusively during computer-based classes and only where authorised by the teacher.

Aims

The course aims to develop students' ability to investigate selected vibration and noise problems in automotive engineering by combining physical principles with suitable analytical, numerical and experimental methods. Students learn to interpret signals, formulate simplified dynamic models, conduct basic modal, harmonic response and acoustic FEM analyses, and identify likely vibration and noise sources. The course emphasises critical assessment of results and their use in developing NVH mitigation measures.

Study aids

NORTON, M. P. and D. G. KARCZUB. Fundamentals of Noise and Vibration Analysis for Engineers. 2nd ed. Cambridge University Press, 2003. ISBN 978-0-521-49561-5.

SMETANA, C. a kol. Hluk a vibrace: měření a hodnocení. Praha: Sdělovací technika, 1998.

NOVÝ, R. and M. KUČERA. Snižování hluku a vibrací. Praha: ČVUT, 2009.

SHENG, G. Vehicle Noise, Vibration, and Sound Quality. Warrendale: SAE International, 2012. ISBN 978-0-7680-7513-7.

The study programmes with the given course

Programme N-ADI-P: Automotive and Material Handling Engineering, Master's, compulsory

Programme N-ENG-A: Mechanical Engineering, Master's, compulsory-optional

Programme MPA-AEE: Automotive Electronics and Electromobility, Master's, compulsory-optional

Programme N-AAE-P: Advanced Automotive Engineering, Master's, compulsory-optional

Type of course unit

 

Lecture

26 hours, optionally

Syllabus


  1. Fundamental Concepts and Quantities in Vibroacoustics

  2. Frequency-Domain Analysis of Vibroacoustic Signals and Sound Levels

  3. Vibration of Discrete Mechanical Systems

  4. Vibration of Discrete Systems and Rotor Dynamics

  5. Modal Analysis Using FEM

  6. Harmonic Response Analysis Using FEM

  7. Fundamentals of Sound Propagation in Acoustic Media

  8. Sound Generation and Finite Element Analysis of Acoustic Fields

  9. NVH of Elastomeric Components and Bearings

  10. NVH of Turbochargers

  11. Vibration and Noise of Internal Combustion Engines

  12. Vibration and Noise of Electric Motors and Drivetrains

  13. Vehicle NVH under Operating Conditions

Computer-assisted exercise

26 hours, compulsory

Syllabus


  1. Introduction of NVH methods and tools

  2. Processing of vibroacoustic signals obtained by measuring motor vehicles

  3. Analysis of motor vehicle vibrations using analytical methods

  4. Analysis of turbocharger rotor vibrations using analytical methods

  5. Presentation of commercial FEA tools for solving dynamic problems

  6. Application of FEM for modal structural analysis of vehicle components

  7. Application of FEM for modal structural analysis of drivetrain components

  8. Creation of reduced elastic body for dynamic analysis

  9. Application of FEM for harmonic structural analysis of drivetrain components

  10. Application of FEM for harmonic structural analysis of vehicle components

  11. FEM application for modal acoustic analysis of the tractor cabin cavity

  12. FEM application for harmonic acoustic analysis of the inlet pipe cavity

  13. Analysis of vehicle vibrations and noise using FEM and analytical methods