VIBROACOUSTIC ANALYSIS OF A FINITE CYLINDRICAL SHELL WITH INTERNAL FLOOR PARTITION

✍ Scribed by J. MISSAOUI; L. CHENG

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 409 KB
• Volume: 226
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1999.2278

✦ Synopsis

Vibroacoustic analysis of a "nite isotropic thin cylindrical shell with an internal #oor partition is presented in the present paper. A general formulation is developed based on a variational approach in which the structural coupling between sub-structures is simulated using the arti"cial spring technique, while the acoustic "eld is computed by an integro-modal approach. For validation purposes, numerical results are compared with experimental data. Numerical analysis is performed to show the structural and acoustical e!ects of the #oor on the internal pressure "eld. Further analysis is made to identify contributions of individual structural modes to sound radiation. The present paper illustrates how the two previously established methods (arti"cial spring technique and the integro-modal approach) can be combined into a vibroacoustic model in the prediction of the structural acoustic response of complex shaped cavities surrounded by structural boundaries.