Optimization of non-local impedance parameters of viscoelastic materials
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摘要: 针对敷设粘弹性材料的刚体声散射问题提出了一种利用等效非局域阻抗基本代数模型计算表面声阻抗矩阵的方法.并以敷设粘弹性材料的球体为例,采用全局收敛移动近似算法(GCMMA, Globally Convergent Method of Moving Asymptotes)对非局域声阻抗代数模型的参数进行了优化,使其声散射计算结果与使用有限元得到的结果一致.研究表明:等效非局域阻抗基本代数模型可以应用于表面敷设粘弹性材料球体声散射的数值计算,为研究潜艇等复杂水下目标的声散射提供了有效的途径.
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关键词:
- 非局域声阻抗 /
- 粘弹性 /
- 全局收敛移动近似算法
Abstract: The context was devoted to the construction of a basic algebraic model for calculating non-local acoustic impedance matrix about acoustic scattering problem. A sphere laid by a certain kind of viscoelastic material was waken for example. The globally convergent method of moving asymptotes (GCMMA) was applied to optimize the parameters of the non-local acoustic impedance model and was verified. The results show that the basic algebraic model can be used to calculate the surface non-local acoustic impedance of the sphere laid viscoelastic materials. This conclusion will provide an effective research method for studying acoustic scattering of other underwater targets laid viscoelastic materials. -
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