STUDY ON THE RADIATION ACOUSTIC FIELD OF RECTANGULAR RADIATORS IN FLEXURAL VIBRATION

✍ Scribed by L. SHUYU

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 409 KB
• Volume: 254
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.2001.4095

✦ Synopsis

In this paper, the radiation acoustic "eld of a rectangular radiator in #exural vibration is studied. The radiator is a rectangular thin plate in #exural vibration with simply supported boundary conditions. Based on the theory of Rayleigh integral, the acoustic pressure distribution of the radiator in its far "eld is obtained analytically and the near acoustic "eld of the radiator is also computed numerically. In the near "eld, the three-dimensional acoustic pressure distribution is obtained. In the far "eld, the two-and three-dimensional acoustic pressure distribution patterns are calculated. The dependence of the radiation acoustic pressure of the radiator on the vibrational order of the plate in #exural vibration is analyzed. It is demonstrated that the radiation acoustic pressure along the central axis of the radiator is always zero in the near and far acoustic "elds, and the radiation near acoustic "eld and the far acoustic "eld are both directional. This is di!erent from the acoustic "eld generated by an oscillating piston. On the other hand, when the vibrational order is increased, the acoustic pressure distribution of the radiator becomes complex.