Mode selection and transduction for structural monitoring using lamb waves

摘要

Lamb waves can propagate many metres along plate and shell structures, and so have great potential in `smart structure' applications where it is important for a transducer to interrogate a significant area of the surrounding structure. However, there are many diffeent types of Lamb wave and in order to obtain simple signals that can be reliably interpreted, it is important to excite a single mode in a well controlled direction.