Modelling the transient interaction of a thin elastic shell with an exterior acoustic field

2008 ◽  
Vol 75 (3) ◽  
pp. 275-290 ◽  
Author(s):  
David J. Chappell ◽  
Paul J. Harris ◽  
David Henwood ◽  
Roma Chakrabarti
Keyword(s):  
Acoustic Field ◽  
Elastic Shell ◽  
Thin Elastic Shell ◽  
Transient Interaction

scholarly journals Acoustic Scattering by an Axisymmetric Thin Elastic Shell

1971 ◽  
Vol 50 (1A) ◽  
pp. 153-153
Author(s):  
S. Chang ◽  
B. S. Chambers ◽  
B. J. Maxum
Keyword(s):  
Elastic Shell ◽  
Acoustic Scattering ◽  
Thin Elastic Shell

Effect Comparative and Experimental Analysis of Diffraction Sound Field Caused by Impedance Sphere and Elastic Spherical Shell on Directivity of Vector Sensor

2011 ◽  
Vol 42 (11) ◽  
pp. 57-64
Author(s):  
Ji Jian-Fei ◽  
Liang Guo-Long ◽  
Pang Fu-Bin ◽  
Zhang Guang-Pu
Keyword(s):  
Acoustic Field ◽  
Elastic Shell ◽  
Sound Field ◽  
Elastic Vibration ◽  
Vibration Velocity ◽  
Rigid Boundary ◽  
Impedance Boundary ◽  
Vector Sensor ◽  
Incident Plane ◽  
Shell Boundary

The directivity of acoustic vector sensor (AVS) will be distorted by the sound diffraction of the AVS carrier. A common AVS carrier in accordance with its acoustic characteristics can be approximately classified into three types: absolute soft air cavity, absolute rigid solid metal body and elastic shell filled with air. The focus of this paper is placed on the pressure and vibration velocity component of diffraction acoustic field caused by impedance boundary and elastic spherical boundary. Their mathematical expressions are deduced, and their directivity is also analyzed at different frequencies for different impedances. The results show that: for impedance boundary, its influences on directivity of pressure and vibration velocity is decided by the diffraction background term, and for the elastic shell boundary filled with air, the diffraction acoustic field can be seen as the sum of the diffraction acoustic field of rigid boundary and the radiated sound field of elastic vibration spherical shell boundary. When the frequency of the incident plane wave deviates from the resonance frequency of the elastic vibration shell, the diffraction acoustic field of the rigid boundary plays a major role, but when the frequency of the incident plane wave is close to the resonance frequency, the radiated sound field of the elastic vibration shell will hold the dominance. The experimental data are treated and the errors between the experimental results and the theoretical results are analyzed.

A Solution for the Thin Elastic Shell With Surface Loads

1964 ◽  
Vol 31 (1) ◽  
pp. 91-96 ◽  
Author(s):  
C. R. Steele
Keyword(s):  
Temperature Distribution ◽  
Elastic Foundation ◽  
Wide Class ◽  
Elastic Shell ◽  
Asymptotic Series ◽  
Surface Load ◽  
Thin Elastic Shell ◽  
Curvature Coordinate ◽  
Particular Solution ◽  
Surface Loads

The problem considered is the thin elastic shell described by the equations of Novozhilov with an arbitrary but smooth midsurface that has a surface load and/or temperature distribution which varies rapidly with respect to one curvature coordinate. The particular solution is obtained in the form of an asymptotic series in powers of a parameter which is a measure of the rapidity of variation in the distribution. The wide class of problems, for which only the first term of the asymptotic series need be retained, is analogous to the beam on an elastic foundation. However, the advantage of the complex representation of Novozhilov is demonstrated by an example in which the shell is loaded and heated on strips with several conditions of constraint.

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