Abstract
An approach based on boundary element modelling of sound sources
and regularisation techniques was compared with Near-field
Acoustical Holography in a study of vibration patterns on a
rolling tyre [1]. In the present paper, a further investigation of
this Inverse Boundary Element Method (IBEM) is done. Emphasis is
put on the regularisation process and how to choose an appropriate
regularisation parameter in conjunction with the Tikhonov
regularisation. This choice is of vital importance when solving a
discrete ill-posed problem and a useful solution is sought.
Another aspect of the reconstruction process is to feed our model
of the problem with as much a priori knowledge as possible, e.g.
in the sense of known velocity data on some surfaces. In the
modelling of the tyre this can be done by imposing a boundary
condition to the nodes belonging to the rim structure, where the
normal surface velocity is expected to be zero.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of Inter-Noise 99 |
| Publication date | 1999 |
| Publication status | Published - 1999 |
| Event | 28th International Congress and Exposition on Noise Control Engineering - Fort Lauderdale, FL, United States Duration: 6 Dec 1999 → 8 Dec 1999 Conference number: 28 |
Conference
| Conference | 28th International Congress and Exposition on Noise Control Engineering |
|---|---|
| Number | 28 |
| Country/Territory | United States |
| City | Fort Lauderdale, FL |
| Period | 06/12/1999 → 08/12/1999 |