Abstract
Dilatational vibration modes in sandwich panels have been shown to produce an undesirable “coincidence-type” response in the sound-transmission spectrum of light-weight sandwich panels in the medium-to-high frequency range. The governing characteristic frequency equations were developed by employing the Rayleigh-Ritz energy principle for a sandwich panel with variable dimensions and properties. The present solution employs a general strain-energy relation without restricting the skin materials to be identical. Eight characteristic natural frequencies involving dilatational, flexural, and longitudinal effects were determined as a function of panel dimensions and material properties for a simply supported panel. Since the dilatational mode is related to the core properties, particular attention was given to the influence of the core properties on the dilatational natural frequencies. A number of experimental scale panels with various skin and core materials were tested under random-incidence sound-transmission conditions and compared with the theoretical predictions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
