增强的数字等效声学材料 (eNEAM):用于时间域模拟的热粘性效应的多孔介质的分析和数值框架
P C Iglesias1, L Godinho2, J Redondo1
1Instituto de Investigación para la Gestión Integrada de Zonas Costeras, Universitat Politècnica de València, Campus de Gandía, C. Paranimf, 1., 46730 Gandia, Spain.
Materials (Basel, Switzerland)
|December 11, 2025
概括
增强的数字等效声学材料 (eNEAM) 框架改善了在多孔材料中的声音传播预测. 它结合了分析和数值方法,用于准确,高效的声学建模,即使有参数变化.
科学领域:
- 声学 声学 在声学方面
- 材料科学 材料科学 材料科学
- 计算物理 计算物理
背景情况:
- 经典模型与多孔和散热介质的微观特征作斗争.
- 准确的声音传播预测对于材料设计和分析至关重要.
- 现有的数值方法在复杂的声学环境中往往缺乏效率或准确性.
研究的目的:
- 引入增强数字等效声学材料 (eNEAM) 框架.
- 结合分析和数值方法来改进声学建模.
- 提高预测准确度和计算效率,以在多孔材料中传播声音.
主要方法:
- 开发了有效阻抗,复杂波数和吸收系数的分析公式.
- 将热粘性效应集成到分析模型中.
- 采用了一个参数优化策略,重点关注可热系数 (ΨB).
- 在有限差异时间域 (FDTD) 模拟中使用了自适应网状精细化.
主要成果:
- 实现了声学属性的闭式表达式,使得对阻抗管数据的验证成为可能.
- 通过参数优化,显著改善了低频吸收预测.
- 发现热粘性损失在宏观尺度上可以忽略不计,从而降低了计算成本.
- 通过在1-D FDTD中使用自适应网状精细化,将模拟时间缩短了50%以上.
结论:
- eNEAM框架为模拟多孔材料提供了通用和准确的解决方案.
- 它有效地弥合了实验数据,分析模型和数值模拟.
- 该框架保持了对参数变化的稳定性,提高了可靠性.
- eNEAM为声学模拟提供了一个计算高效的方法.
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