Coupling of highly nonlinear waves with linear elastic media
Coupling of highly nonlinear waves with linear elastic media
复制标题
高度非线性波与线弹性介质的耦合
DOI：
10.1117/12.817574
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发表时间：
2009
影响因子：
4
通讯作者：
P. Rizzo
中科院分区：
文献类型：
--
作者：
D. Khatri;C. Daraio;P. Rizzo
本文报道了一个基本的研究之间的耦合的高度非线性波，产生在一个一维颗粒链的颗粒，与线性弹性介质，一个新的无损评价和结构健康监测（NDE/SHM）的范式的发展。我们设计并使用新型声学激励器在一维线弹性杆中激发出紧凑的高度非线性孤立波，并研究了脉冲在界面上的传播。为了对致动器和杆系统进行建模，我们使用有限元分析（Abaqus）并获得了实验观察结果和数值结果之间的良好一致性。我们还研究了系统的响应存在的缺陷（裂纹）的钢棒，通过比较原始和裂纹的测试对象中的波传播特性。所获得的结果鼓励使用高度非线性波作为开发一种新的，可行的NDE/SHM方法的有效工具。
This paper reports a fundamental study of the coupling between highly nonlinear waves, generated in a one dimensional granular chain of particles, with linear elastic media, for the development of a new Non Destructive Evaluation and Structural Health Monitoring (NDE/SHM) paradigm. We design and use novel acoustic actuators to excite compact highly nonlinear solitary waves in a one-dimensional linear elastic rod and investigate the pulse propagation across the interface. To model the actuator and rod system we use Finite Element Analysis (Abaqus) and obtain excellent agreement between the experimental observations and the numerical results. We also study the response of the system to the presence of defects (cracks) in the steel rod, by comparing the wave propagation properties in pristine and cracked test objects. The obtained results encourage the use of highly nonlinear waves as an effective tool for developing a new, viable NDE/SHM method.