General Course Information
Course code | VTA091, course description |
Course Administration | Wolfgang Kropp |
Lecturers | Wolfgang Kropp |
Assistant | |
Lecture hall | Applied Acoustics/teaching lab |
Exam | Three written reports and a final presentation |
Course PM | |
Course Evaluation | – |
Literature
- Guidelines for report writing
- Course literature Technical Acoustics 1
- Literature about the specific methods can be found under each section.
- Optional reading: Additional literature on the different methods can be found in a separate section below.
Noteboard
Welcome to the first lecture 18/1 10:00!
Experimental data
The following document describes the structure and gives information about the available measurement data. Note, that the material parameters which we provide are only starting values, i.e. average data as may be given by the producer of the plexiglas sheets and isolation materials.
Measured Data
These data are mainly intended to check against your numerical results.
Wave Approach – Infos and Data
Note that the geometry and the material data of the structure used in the Appendix: Matlab code is not necessarily completely identical to that of the current structure.
The Finite Element Method – Infos and Data
This document describes how you can install COMSOL Multiphysics 5 on your own computer. Please install it as class-kit license (CKL). The licenses are available via the student portal web site.
Here are the slides from the two lectures:
This is a document showing the complete Finite Difference and Finite Element derivations for the rod example used in the lecture:
Below you can find all relevant material for the assignment (cf. also the Experimental Data section). You will find the slides which were used when presenting the assignment, a more detailed task description and the Comsol Multiphysics Guide which describes how to implement the FE-model in Multiphysics. Read the latter document before going on with readMultiphysicsTXT.m.
SEA – Infos and Data
Part 1 Vibrations
- See the SEA Vibration module at the Canvas room of the course:
- https://chalmers.instructure.com/courses/12257
Part 2 Radiation
- See the SEA Vibration module at the Canvas room of the course:
- https://chalmers.instructure.com/courses/12257
BEM – Infos and data
Here are the slides from the lecture with some additional notes. Thanks to Office 2016 the actual slides might be a little bit blurry, so you will also find a high-quality slides-only PDF of the presentation.
These are the documents for the task:
- BEM task descriptionÂ
- Comsol Multiphysics 6.2 FEM / BEM Guide
- Document on enclosures from TU Berlin.
- Slides on vibration isolation. See also additional documents under Optional reading.
- Sylomer SR.
- Sylomer HD. Swedish only.
- Sylodyn NB to NF.
In the Optional Reading section at the bottom of this page you can find more documents about BEM theory.
Re-design part – Theory and useful information
Here are the slides from the introduction lectures:
Documents on some noise and vibration control measures:
More information can also be found in L. Cremer, M. Heckl, B.A.T. Petersson: Structure-borne sound, 3rd ed., Springer (2005) (available as e-book from the Chalmers library).
Data sheets for different Sylomer vibration isolation materials:
Optional reading
A good document on numerical methods which describes the theory more general (not sticking as much to one example as we did):
A document with details about eigenvalue analysis, modal superposition and damping:
Two documents with a more mathematical approach at explaining BEM:
Two additional documents on vibration isolation: