Parametric sensitivity analysis of coupled acoustic-structural systems
Parametric sensitivity analysis of coupled acoustic-structural systems
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DOI：
10.1115/1.568447
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发表时间：
2000-04
期刊：
影响因子：
--
通讯作者：
F. Scarpa
中科院分区：
文献类型：
--
作者：
F. Scarpa
本文提出了一种声-结构耦合系统参数灵敏度的计算方法。为了计算耦合频率和模式，对称欧拉公式。从一个状态空间制定的问题的灵敏度算法，以获得系统的耦合频率和模式与设计参数向量的导数。该算法是基于从状态空间方程的解得到的复共轭特征值的性质。给出了简支板支撑的矩形空腔的数值算例。比较结果表明，数值计算和分析结果之间有很好的一致性。
In this paper a method for the parametric sensitivity of acoustic-structural coupled systems is presented. The symmetrical Eulerian formulation is applied in order to calculate the coupled frequencies and modes. From a state space formulation of the problem a sensitivity algorithm is developed to obtain the derivatives of the coupled frequencies and modes of the system versus a design parameter vector. The algorithm is based on the properties of the complex conjugate eigenvalues obtained from the solution of the state space equation. Numerical examples from an acoustic rectangular cavity backed by a simply supported plate are presented. The comparison reveals a good agreement between numerical and analytical results.