Acoustic radiation and scattering from elastic structures

✍ Scribed by D. T. Wilton

• Publisher: John Wiley and Sons
• Year: 1978
• Tongue: English
• Weight: 932 KB
• Volume: 13
• Category: Article
• ISSN: 0029-5981
• DOI: 10.1002/nme.1620130109

✦ Synopsis

This paper presents a numerical technique for the linear dynamic analysis of a finite elastic structure immersed in an infinite homogeneous acoustic medium. It is required to determine the vibrational motion of the structure and also the associated acoustic field in the fluid, when the structure is either subjected to internal applied forces or is acting as a scatterer of an incident acoustic wave. A finite element analysis of the structure is matched at the structure-fluid interface with an integral equation representation of the exterior acoustic field, leading to a coupled system of equations which may be cast in either acoustic or structural form. The former approach is preferred here for which numerical results are presented when the method is applied to plane wave scattering by thick and thin elastic spherical shells.