Abstract
The vibration response to application of discontinuous constrained layer damping (CLD) patches to varied portions of a free‐free beam was studied. Since neither closed‐form solutions nor finite element methods can be readily implemented for CLD analysis with partial coverage of a structure under broadband excitation [C. T. Sun and Y. P. Lu, Vibration Damping of Structural Elements (Prentice‐Hall, Englewood Cliffs, NJ, 1995), pp. 318–362], an empirical approach was taken. The test object was a 26.5‐ × 1‐ × 1/8‐in. steel beam, and was subjected to a chirp. The aim was to quantify the relative effectiveness of varied lengths and positions of CLD patches in reducing the response of the first five resonant modes of the beam. Assessment of the potential for strain energy dissipation was made based on the net displacement of the beam (appropriately phased mode summation), with relative phase of the summed modes specific to the input force signal. Attempts were made to correlate the effect of CLD on each mode to the time‐averaged percentage of strain energy for that mode under the treatment patch, coupled with the percentage of the beam’s strain energy under the patch. [Work supported by NSF.]
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.