基于遗传算法的多材料水下宽带吸声元材料的拓优化
Feifei Feng1, Chuan He1, Zixian Cui2
1School of Mechanical Engineering, Guizhou University, Guiyang, 550025, China.
The Journal of the Acoustical Society of America
|May 6, 2025
概括
这项研究利用拓优化优化了水下声学元材料的声音吸收. 由此产生的三相材料结构在广泛的频率范围内实现了高的平均声音吸收系数.
科学领域:
- 声学 声学 声学 声学
- 材料科学 材料科学 材料科学
- 超材料是指一种超材料.
背景情况:
- 改善水下声学超材料需要结合多种声音能量消散机制.
- 目前用于计算吸收系数的方法通常依赖于有限元法.
- 设计微观结构以实现最佳性能是一个关键的挑战.
研究的目的:
- 使用拓优化设计水下声学元材料的微结构.
- 为了研究三相材料结构的吸声性能.
- 为了确定最佳的材料分布,以增强声音吸收.
主要方法:
- 将六边形单位与2D轴对称单位进行近似,用于有限元分析.
- 结合遗传算法和拓优化来设计超材料微结构.
- 使用,空气和散射器作为优化材料;使用数据过来防止棋盘模式.
主要成果:
- 最优的拓结构实现了500-10,000赫兹之间的平均声音吸收系数为0.9574.
- 分析揭示了拓结构的声音吸收机制.
- 三相材料结构比两相结构具有优势.
结论:
- 开发的拓优化方法有效地设计宽带水下声学元材料.
- 的材料参数对吸声的影响最小,简化了材料选择.
- 这项研究为使用多相材料创建低频,宽带水下声学元材料提供了洞察力.
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