一个基于功率的框架,用于量化有限振动声学元材料板中的参数不确定性
Heiko Atzrodt1, Arun Maniam1, Marvin Droste1
1Fraunhofer Institute for Structural Durability and System Reliability LBF, 64289 Darmstadt, Germany.
Materials (Basel, Switzerland)
|July 29, 2023
概括
使用活性结构强度 (STI) 的新方法准确预测了振动声学元材料 (VAMM) 的停止带行为. 这种方法量化功率损耗,以分析振动减弱,并指导VAMM结构的制造公差.
科学领域:
- 声学和材料科学 声学和材料科学
- 超材料工程 超材料工程
- 振动声学是一种振动声学.
背景情况:
- 振动声学超材料 (VAMM) 是设计用于控制声波的工程材料,通过创建阻断带来抑制波传播.
- 准确预测停止带行为对于设计有效的VAMM结构至关重要.
- 预测停止带行为的现有方法对有限结构的准确性有局限性.
研究的目的:
- 引入和验证一种新的基于功率的方法,使用主动结构强度 (STI) 来预测有限VAMM结构的停止带行为.
- 为了定量分析VAMM板的振动减弱能力.
- 建立一个研究参数不确定性对VAMM性能影响的框架.
主要方法:
- 开发一种基于功率的方法,利用活性结构强度 (STI) 来量化VAMM板的功率损耗.
- 应用STI方法 (STI<99%和STI<90%) 来预测25个共振器的2DVAMM板中的停止频段限制.
- 拟议的STI方法与负有效质量,单元细胞分散分析和频率响应函数方法的比较.
主要成果:
- 与传统方法相比,基于STI的方法可以更准确地预测有限VAMM板的停止带极限.
- 该研究展示了使用STI百分比的振动减弱的定量分析.
- 该框架成功地研究了参数不确定性对停止带行为的影响.
结论:
- 活性结构强度 (STI) 方法为预测有限的振动声学元材料的停止带行为提供了一种优越的方法.
- STI 99% 方法表明,对于强大的 VAMM 性能,需要更严格的制造公差.
- STI90%方法表明,可以使用宽松的公差来实现具有成本效益的制造,同时保持所需的性能.
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