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Comparison between Modal Analysis and Finite Element Modeling ofa
| Content Provider | Semantic Scholar |
|---|---|
| Author | Antoine, Germany Chaigne Louis-Cyrille Trebuchet E. N. S. T. |
| Copyright Year | 1997 |
| Abstract | Running title: modal analysis and modeling of a marimba bar 1 Abstract The sound spectrum of low tuned marimba bars contains many components that cannot be explained by a simple one-dimensional model of exural vibrations. A modal analysis has been then performed on a bass marimba bar C 3 with a fundamental frequency of 130 Hz (outer dimensions: 46 cm x 6 cm x 2.35 cm (x,y,z), material: rosewood), taking into account two spatial components of vibration. The 20 most prominent modal frequencies and mode shapes were extracted from this analysis. A 3-D nite element (FE) analysis of this bar, based on an orthotropic model for the material, has been conducted in parallel. Modal analysis and nite element modeling yield very similar mode shapes and modal frequencies for the rst 12 modes, between 130 Hz and 4000 Hz, which connrms the experimental results and validates the theoretical approach. The discrepancies between measured and calculated frequencies are less than 4 % in this frequency range. For higher frequencies, between 4000 Hz and 8000 Hz, the nite element analysis show a number of modes which were not detected in the modal analysis. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://tsi.enst.fr/~cappe/publisig/docs/marimba.ps.gz |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
