考虑弹性隔板边界条件的柱形封闭腔结构-声耦合分析

姚昊萍;张静

振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 205-208.

PDF(1084 KB)
PDF(1084 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 205-208.
论文

考虑弹性隔板边界条件的柱形封闭腔结构-声耦合分析

  • 姚昊萍;张静
作者信息 +

Analysis of Structural-Acoustic Coupling of A Panel with Arbitrary Boundary Conditions in Cylindrical Enclosure

  • YAO Hao-ping; ZHANG Jing
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摘要

通过在柱形腔体内的弹性隔板四周施加假想的弹簧系统,建立了考虑弹性隔板边界条件的圆柱形腔体内的声场模型。该模型利用汉密尔顿函数和声模态理论,充分考虑了弹性隔板与两个柱形腔体内声场之间的耦合以及弹性板的边界条件对腔体内声场的影响。通过算例分析表明在所研究的低频段,支承弹性板的旋转弹簧刚度对腔体内声场与弹性板之间振动耦合的影响弱于线弹簧刚度,由腔体1的内声场引起的弹性隔板的振动速度受线弹簧刚度的影响要甚于旋转弹簧刚度;腔体2内的平均声压随支承弹性隔板的线弹簧刚度的增大而增加,而旋转弹簧刚度的变化对声压的影响较小。本文的研究为工程中柱形腔体内设置有弹性板的结构噪声分析和控制提供了一定的理论依据。

Abstract

The model of sound field of a rigid cylindrical enclosure with a middle flexible panel is deduced by using Hamiltonian function and sound modal theory. The model allows the consideration of a wide variety of boundary conditions by means of continuous distributions of artifical springs along boundary of flexible panel. A general formulation considering the full coupling between the two cavities and the panel with different boundary conditions is developed. Analytical results intended to investigate two main issues are presented. One is that the rotational stiffness has less influence on the structural-acoustic coupling of the model and the panel velocity than the translational stiffness has,the other is that the sound response of cavity 2 caused by panel increases with the increase of the translational stiffness. The contribution of this paper is that it provides some supporting theoretically in engineering.

关键词

柱形腔体 / 耦合 / 弹性支承

Key words

cylindrical enclosure / coupling /  elastic supported

引用本文

导出引用
姚昊萍;张静. 考虑弹性隔板边界条件的柱形封闭腔结构-声耦合分析[J]. 振动与冲击, 2011, 30(12): 205-208
YAO Hao-ping;ZHANG Jing. Analysis of Structural-Acoustic Coupling of A Panel with Arbitrary Boundary Conditions in Cylindrical Enclosure [J]. Journal of Vibration and Shock, 2011, 30(12): 205-208

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