SD2140 Vibro Acoustics 8.0 credits


The course will provide information about how dynamic forces excite mechanical structures and how various responce wavetypes are transmitted through structures. Finally, the mechanism of acoustic energy radiation from these vibrating structures is examined.

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Offering and execution

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Course information

Content and learning outcomes

Course contents *

Wave types in solids. Excitation of vibrations. Modes of vibrations in solids. The mobility concept. Wave propagation and attenuation. Transmission between structures. Acoustical radiation from transmission through structures. Prediction models.

Intended learning outcomes *

Vibrations are often generated by dynamical and acoustical forces exciting large complex constructions. The aim of the course is to illustrate how these disturbances are excited and how the mechanical energy is transmitted by various wave types in and between structures, how various wave types interact and finally how acoustical energy is radiated from a structure to a surrounding fluid.

Students graduating from the course shall be able to:

  • Explain free and forced vibrations of a system
  • Discuss and explain how a structure can be excited
  • Discuss models for energy flow between structural elements
  • Explain the response of a structure excited by a harmonic or random forces
  • Explain kinetic and potential energy of a structure as function of the input power to the system
  • Discuss some possible methods for the reduction of the transmission of structure-borne sound to a mechanical system
  • Use some different methods for the prediction of the response of a structure

Course Disposition

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Literature and preparations

Specific prerequisites *

Basic courses in mathematics, mechanics.

Recommended prerequisites

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Nilsson, A. Vibroacoustics Part I och Part II. (In English)

Examination and completion

If the course is discontinued, students may request to be examined during the following two academic years.

Grading scale *

A, B, C, D, E, FX, F

Examination *

  • TEN1 - Examination, 8.0 credits, Grading scale: A, B, C, D, E, FX, F

Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.

The examiner may apply another examination format when re-examining individual students.

Other requirements for final grade *

Written examination (TEN1; 8 university credits).

Opportunity to complete the requirements via supplementary examination

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Opportunity to raise an approved grade via renewed examination

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Peter Göransson

Ines Lopez Arteaga

Ethical approach *

  • All members of a group are responsible for the group's work.
  • In any assessment, every student shall honestly disclose any help received and sources used.
  • In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.

Further information

Course web

Further information about the course can be found on the Course web at the link below. Information on the Course web will later be moved to this site.

Course web SD2140

Offered by

SCI/Aeronautical and Vehicle Engineering

Main field of study *

Mechanical Engineering

Education cycle *

Second cycle

Add-on studies

SD2165 Acoustical Measurements
SD2150 Experimental Structure Dynamics
SD2155 Flow Acoustics
SD2160 Sound and Vibration, Project Course
SD2170 Energy Methods
SD2175 Numerical Methods for Acoustics and Vibration
SD2180 Non-Linear Acoustics
SD2185 Ultrasonics
SD2190 Vehicle Acoustics and Vibration


Ines Lopez Arteaga (