Propagation characteristics of shear horizontal waves in ice-coated CFRP plate
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摘要: 针对超声导波技术在飞机结冰探测中的应用前景,结合航空复合材料的发展趋势,着重研究了水平剪切波在覆冰碳纤维增强复合材料板中的传播特性。提出了由独立工程常数获取材料刚度矩阵的方法,采用转移矩阵法建立了层状结构波导模型,克服了传统全局矩阵法求解过程复杂耗时的缺点。绘制了多种不同状态下的水平剪切波频散曲线,通过对比其差异,总结了有无冰层、冰层厚度和冰层类型对水平剪切波传播特性的影响及其规律,为结冰探测研究提供了理论基础。Abstract: In view of the application prospect of ultrasonic guided wave technology in aircraft icing detection, combined with the development trend of aviation composite materials, the propagation characteristics of shear horizontal waves in ice-coated carbon fiber reinforced polymer plate were studied emphatically. The method of obtaining material stiffness matrix from independent engineering constant is proposed, and the layered waveguide model is established by transfer matrix method, which overcomes the shortcoming of traditional global matrix method. The dispersion curves of shear horizontal waves in different situations are drawn, and the influence of ice layer, ice thickness and ice type on the propagation characteristics of shear horizontal waves is summarized by comparing their differences, which provides a theoretical basis for ice detection.
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