Mode perturbation method for optimal guided wave mode and frequency selection

J. H. Philtron, J. L. Rose

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


With a thorough understanding of guided wave mechanics, researchers can predict which guided wave modes will have a high probability of success in a particular nondestructive evaluation application. However, work continues to find optimal mode and frequency selection for a given application. This "optimal" mode could give the highest sensitivity to defects or the greatest penetration power, increasing inspection efficiency. Since material properties used for modeling work may be estimates, in many cases guided wave mode and frequency selection can be adjusted for increased inspection efficiency in the field. In this paper, a novel mode and frequency perturbation method is described and used to identify optimal mode points based on quantifiable wave characteristics. The technique uses an ultrasonic phased array comb transducer to sweep in phase velocity and frequency space. It is demonstrated using guided interface waves for bond evaluation. After searching nearby mode points, an optimal mode and frequency can be selected which has the highest sensitivity to a defect, or gives the greatest penetration power. The optimal mode choice for a given application depends on the requirements of the inspection.

Original languageEnglish (US)
Pages (from-to)1817-1824
Number of pages8
Issue number7
StatePublished - Sep 2014

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics


Dive into the research topics of 'Mode perturbation method for optimal guided wave mode and frequency selection'. Together they form a unique fingerprint.

Cite this