Further Development of the Computational Technique for Dynamics of Structure Subject to Aerodynamic and Acoustic Excitation
- Paper number
IAC-05-C2.2.08
- Author
Mr. Harijono Djojodihardjo, Universitas Al Azhar Indonesia, Indonesia
- Coauthor
Mr. Eric Tendean, Institut Teknologi Bandung, Indonesia
- Year
2005
- Abstract
The previous study has addressed the influence of acoustic source, along with aerodynamic excitations, to the dynamic of structures. The acoustic source excitation is formulated using boundary element formulation of the governing Helmholtz equation for the acoustic wave propagation, and the acoustic loading on the structure is calculated. A particular example being dealt with is the coupled acoustically modified aeroelastic instability problem. Further simplification is made by disregarding the reflection and absorption in the more complex scattering phenomena in the treatment of the acoustic wave propagation problem. Hence the acoustic terms on the right hand side can be calculated as an isolated problem using Boundary Element Method. The solution to this equation has been worked out for the coupled unsteady aerodynamic and acoustic excitation in the aeroelastic instability problem. Each of the generic problem of aeroelastic instability and acoustic excitation has been validated . In the present work, further development is carried out in dealing with the acoustic load on the structure. The load due to quadrupole acoustic source is considered, and the resulting unsteady load on the surface of the structure is calculated. As an example, the coupled acoustically modified aeroelastic instability problem on a reference structure is worked out. The results are compared to previous ones due to monopoles and discussed. Other applications are worked out and discussed.
- Abstract document
- Manuscript document
IAC-05-C2.2.08.pdf (🔒 authorized access only).
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