在具有大量层次的液体载荷粘弹性复合材料中的引导波溶液的分类
1Center for Lightweight Production Technology, Institute of Structures and Design, German Aerospace Center (DLR), Augsburg, Bavaria 86159, Germany.
The Journal of the Acoustical Society of America
|August 22, 2023
概括
一个新的开源软件,分散计算器 (DC),有效地计算指导超声波分散图的复杂的复合结构. 它克服了厚厚的,分层材料的挑战,帮助航空航天检查.
科学领域:
- 材料科学 材料科学 材料科学
- 声学 声学 在声学方面
- 航空航天工程 航空航天工程
背景情况:
- 导向超声波对于检查多层复合材料航空航天结构至关重要.
- 计算厚厚复合材料 (>100层) 的分散图在计算上具有挑战性.
- 现代火箭助推器压力容器代表了复杂的,厚壁复合结构.
研究的目的:
- 为了介绍开源分散计算器 (DC) 软件.
- 为了解决复杂复合结构的分散图和模式形状计算的困难.
- 为了在减弱和非减弱的情况下能够对引导的超声波进行高效和可靠的分析.
主要方法:
- 使用刚度矩阵方法对漏电的Lamb和Scholte波进行分析.
- 采用了剪切水平 (SH) 波的转移矩阵方法,以避免数值不稳定.
- 实现了非减弱和减弱情况下的模式家族特定的分散方程.
- 模拟了对称,反对称和非对称的波传播.
主要成果:
- 成功计算了浸入水中的400层粘弹性复合材料的分散图和模式形状.
- 证明了软件能够处理复杂的减弱波传播的能力.
- 实现了各种波形模式单独的高效和强大的跟踪.
- 对DISPERSE软件进行验证,对所选案例进行验证.
结论:
- 分散计算器 (DC) 为分析复杂复合结构中的引导超声波提供了可靠和高效的解决方案.
- 该软件克服了与厚壁复合材料和衰减效应相关的数值挑战.
- 电流增强了航空航天部件的检查能力,例如火箭助推器压力容器.
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