EFFECT OF A VIBRATING SUBSTRUCTURE ON ACOUSTIC RADIATION FROM A CYLINDRICAL-SHELL

被引：22

作者：

ACHENBACH, JD

BJARNASON, J

IGUSA, T

机构：

[1] Robert R. McCormick School of Engineering and Applied Science, Department of Civil Engineering, Northwestern University, Evanston, IL

来源：

JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME | 1992年 / 114卷 / 03期

关键词：

Acoustic waves - Computers - Dynamic response - Structural analysis - Vibrations (mechanical);

D O I：

10.1115/1.2930263

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The presence of a substructure in a cylindrical shell gives rise to dynamic interactions, including resonance effects, which have an influence on the radiated acoustic field. The lowest mode of the substructure may interact vigorously with a higher order mode of the shell. In this paper a Lagrangian formulation is used to analyze the forced motion of the immersed shell/substructure system. In addition, the frequency window method is used to reduce the complexity of the resulting expressions and to obtain approximate solutions in a frequency range of interest. The particular example is concerned with a spring-mass system, which is attached to the shell. Three cases of forced harmonic motion are considered. The radiated pressure is computed as a function of the frequency. The radiated pressure for the shell/substructure system is compared with that for a shell without an oscillator subjected to the same input force.

引用

页码：312 / 318

页数：7

共 9 条

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