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ES386-15 Dynamics of Vibrating Systems

Academic year
20/21
Department
School of Engineering
Level
Undergraduate Level 3
Module leader
Peter Brommer
Credit value
15
Module duration
10 weeks
Assessment
60% coursework, 40% exam
Study location
University of Warwick main campus, Coventry
Introductory description

ES386-15 Dynamics of Vibrating Systems

Module web page

Module aims

Vibrations exert a significant influence on the performance of the majority of engineering systems. All engineers should understand the basic concepts and all mechanical engineers should be familiar with the analytical techniques for the modelling and quantitative prediction of behaviour. Thus, this module provides students with fundamental skills necessary for the analysis of the dynamics of mechanical systems, as well as providing opportunities to apply these skills to the modelling and analysis of vibration.
This third-year module is mandatory for students pursuing a degree in Mechanical Engineering, building upon competences acquired earlier in the course. This module introduces students to the use of Lagrange’s equations (applied to 1D and 2D systems only for this module) and to techniques for modelling both lumped and continuous vibrating systems. It includes some coverage of approximate methods both as an aid to physical understanding of the principles and because of their continuing usefulness. The module assumes basic understanding of mechanics and linear algebra consistent with the level of Year 2 modules.
At the end of the module students should have a sound understanding of the wide application of vibration theory and of the underlying physical principles. In particular, they should be able to use either Newtonian or Lagrangian mechanics to analyse 2D systems, and to determine the response of simple damped and undamped multi-degrees of freedom (DOF) systems to both periodic and aperiodic excitation. They should also be familiar with engineering solutions for measuring and influencing vibrational behaviour.

Outline syllabus

This is an indicative module outline only to give an indication of the sort of topics that may be covered. Actual sessions held may differ.

  • Generalised co-ordinates, Lagrange's equation (including preliminary study of other classical methods)
  • General application of the Lagrange equation to vibrating systems
  • Multi-degree of freedom systems: lumped system models, continuous system models; geared and branched systems; reduction of an n-DOF system to a set of n single-DOF systems; principal co-ordinates
  • Matrix methods of analysis: conservative and non-conservative (damped) systems; determination of principal co-ordinates
  • Modelling of damping: hysteretic, Coulomb, viscous; measurement of damping factor
  • Forced vibration: harmonic excitation of multi-DOF systems; shaft whirling; transmissibility; vibration isolation; non-harmonic and arbitrary excitation (convolution integral)
  • Approximate methods e.g. Rayleigh's method, Dunkerley's method
Learning outcomes

By the end of the module, students should be able to:

  • 1. Model planar mechanical systems using Newton’s and Lagrange’s equations: Determine appropriate co-ordinate systems, analyse vibrations.
  • 2. Abstract more complex engineering mechanisms: analyse using lumped system models or simple distributed mass and stiffness models. Use and justify standard methods and approximations for extended and continuous vibrating systems.
  • 3. Evaluate the natural frequencies and modes of vibration of a multi-degree of freedom linear system.
  • 4. Determine and analyse the free and forced response of single-degree of freedom systems to periodic and aperiodic excitation, as well as the effects of linear and non-linear damping on the system behaviour.
  • 5. Evaluate complex (multi-degree of freedom) undamped or damped systems numerically, using a systematic approach to analyse the natural frequencies and modes, and the response of the system to periodic and aperiodic excitations.
  • 6. Demonstrate a sound understanding of the application of vibration analysis to key engineering systems.
Indicative reading list
  1. Theory of Vibration with Applications, by W. T. Thomson and M. D. Dahleh. Publisher: Pearson. Fifth edition, 1998. ISBN-10: 013651068X, ISBN-13: 9780136510680.
  2. Principles of Vibration, by B. H. Tongue. Publisher: Oxford University Press. Second edition, 2002. ISBN-10: 0195142462.
  3. Engineering Vibrations, by D. J. Inman. Publisher: Pearson. Fourth international edition, 2013. ISBN-10: 0273768441, ISBN-13: 9780273768449.
  4. Mechanical vibrations, by S. S. Rao, Fook Fah Yap. Publisher: Prentice Hall. Fifth edition in SI units, 2011. ISBN-10: 9810687125, ISBN-13: 9789810687120
  5. Vibrations, by B. Balachandran, E. B. Magrab. Publisher: Cengage. Second international SI edition, 2009. ISBN10: 0495411256, ISBN-13: 9780495411253.

View reading list on Talis Aspire

Subject specific skills

SSS4: Ability to apply relevant practical and laboratory skills.

SSS8: Ability to be pragmatic, taking a systematic approach and the logical and practical steps necessary for, often complex, concepts to become reality.

Transferable skills

TS1: Numeracy: apply mathematical and computational methods to communicate parameters, model and optimize solutions.

TS2: Apply problem solving skills, information retrieval, and the effective use of general IT facilities.

TS3: Communicate (written and oral; to technical and non-technical audiences) and work with others.

TS7: Overcome difficulties by employing skills, knowledge and understanding in a flexible manner.

Study time

Type Required
Lectures 30 sessions of 1 hour (20%)
Seminars 2 sessions of 1 hour (1%)
Practical classes 1 session of 2 hours (1%)
Private study 86 hours (57%)
Assessment 30 hours (20%)
Total 150 hours
Private study description

Guided independent learning, assignment preparation, etc 86 hours.

Costs

No further costs have been identified for this module.

You must pass all assessment components to pass the module.

Students can register for this module without taking any assessment.

Assessment group D3
Weighting Study time
Vibration analysis computational project 20%

Matlab code submitted on Matlab Grader (50%) and a brief computational report (500 words, 50%)

Laboratory Report 10%

Laboratory exercise, write-up on 2-hour lab.

Coursework assignment 30%

In-depth vibrational analysis of a systemt in an 8-page written report.

QMP 40% 30 hours

QMP test

~Platforms - QMP

Feedback on assessment
  • Feedback during laboratory sessions
  • Feedback on assignments.
  • Model solutions to exam type questions.
  • Support through advice and feedback hours.
  • Cohort level feedback on examinations

Past exam papers for ES386

Pre-requisites

To take this module, you must have passed:

Courses

This module is Core for:

  • Year 3 of UESA-H310 BEng Mechanical Engineering
  • Year 3 of UESA-H315 BEng Mechanical Engineering
  • Year 4 of UESA-H314 BEng Mechanical Engineering with Intercalated Year
  • Year 3 of UESA-HH35 BEng Systems Engineering
  • Year 3 of UESA-HH36 BEng Systems Engineering
  • Year 4 of UESA-HH34 BEng Systems Engineering with Intercalated Year
  • Year 3 of UESA-H311 MEng Mechanical Engineering
  • Year 3 of UESA-H316 MEng Mechanical Engineering
  • UESA-H312 MEng Mechanical Engineering with Intercalated Year
    • Year 3 of H312 Mechanical Engineering with Intercalated Year
    • Year 4 of H312 Mechanical Engineering with Intercalated Year
  • Year 4 of UESA-H317 MEng Mechanical Engineering with Intercalated Year
  • UESA-H313 MEng Mechanical Engineering with Year in Research
    • Year 3 of H313 Mechanical Engineering with Year in Research
    • Year 4 of H313 Mechanical Engineering with Year in Research
  • Year 3 of UESA-HH31 MEng Systems Engineering
  • Year 3 of UESA-HH63 MEng Systems Engineering
  • Year 3 of UESA-HH64 MEng Systems Engineering with Intercalated Year
  • UESA-HH65 MEng Systems Engineering with Year in Research
    • Year 3 of HH65 Systems Engineering with Year in Research
    • Year 4 of HH65 Systems Engineering with Year in Research

This module is Core optional for:

  • Year 4 of UESA-H319 BEng Mechanical Engineering with Intercalated Year
  • Year 3 of UESA-H115 MEng Engineering with Intercalated Year
  • UESA-H312 MEng Mechanical Engineering with Intercalated Year
    • Year 3 of H312 Mechanical Engineering with Intercalated Year
    • Year 4 of H312 Mechanical Engineering with Intercalated Year
  • UESA-H317 MEng Mechanical Engineering with Intercalated Year
    • Year 3 of H317 Mechanical Engineering with Intercalated Year
    • Year 4 of H317 Mechanical Engineering with Intercalated Year
  • Year 4 of UESA-HH32 MEng Systems Engineering with Intercalated Year

This module is Optional for:

  • Year 3 of UESA-H113 BEng Engineering
  • Year 3 of UESA-H114 MEng Engineering
  • Year 4 of UESA-H109 MEng Engineering with Intercalated Year
  • Year 4 of UESA-H115 MEng Engineering with Intercalated Year
  • Year 4 of UESA-H110 MEng Engineering with Year in Research
  • Year 4 of UESA-HH65 MEng Systems Engineering with Year in Research

This module is Option list A for:

  • Year 3 of UESA-H106 BEng Engineering
  • Year 4 of UESA-H111 BEng Engineering with Intercalated Year
  • Year 4 of UESA-H118 BEng Engineering with Intercalated Year
  • Year 3 of UESA-H112 BSc Engineering
  • Year 3 of UESA-H107 MEng Engineering
  • Year 3 of UESA-H109 MEng Engineering with Intercalated Year
  • Year 3 of UESA-H110 MEng Engineering with Year in Research