Jh. Ginsberg et Kc. Wu, NONAXISYMMETRIC ACOUSTIC RADIATION AND SCATTERING FROM RIGID BODIES OF REVOLUTION USING THE SURFACE VARIATIONAL PRINCIPLE, Journal of vibration and acoustics, 120(1), 1998, pp. 95-103
The surface variational principle (SVP), which represents the surface
response as a series of basis functions spanning the entire surface, p
rovides a global description of acoustic fluid-structure interaction t
hat has many of the benefits associated with analytical methods. This
paper describes the extension of SVP to model the interaction between
the velocity and pressure on the surface of an axisymmetric body subje
cted to nonaxisymmetric excitation. Problems addressed are radiation d
ue to arbitrary rigid body motion, and scattering associated with arbi
trary incidence of a plane wave on a stationary rigid body. Numerical
results are presented for flat-ended and hemi-capped cylinders. These
results are compared to those obtained from the CHIEF-88 and SHIP-92 c
omputer codes. The convergence properties of SVP are examined in detai
l, particularly for its requirements when ka is in the upper part of t
he mid-frequency range.