acoustics and vibrations

A Postdoctoral Research Fellow position is available immediately in the Advanced Digital & Additive Manufacturing (ADAM) Center at the Khalifa University of Science and Technology in Abu Dhabi in United Arab Emirates. Applicants should demonstrate research capabilities in investigating the acoustic absorption, vibration damping, and mechanical behavior of structural systems made of architected lightweight cellular materials and composites.

Mode-coupling instabilities are known to trigger self-excited vibrations in sliding contacts. Here, the conditions for mode-coupling (or "flutter") instability in the contact between a spherical oscillator and a moving viscoelastic substrate are studied. The work extends the classical 2-Degrees-Of-Freedom conveyor belt model and accounts for viscoelastic dissipation in the substrate, adhesive friction at the interface and non-linear normal contact stiffness as derived from numerical simulations based on a boundary element method capable of accounting for linear viscoelastic effects.

This paper presents a mathematical model for an industry-inspired problem of vibration isolation applied to elastic fluid-filled containers. A fundamental problem of suppression of vibrations within a finite-width frequency interval for a multi-scale fluid-solid system has been solved. We have developed a systematic approach employing full fluid-solid interaction and dispersion analysis, which can be applied to finite and periodic multi-scale systems.

http://www.thorntontomasetti.com/careers/dc_senior_engineer_structural_acoustics/

Dear Colleagues:

The Department of Mechanical and Nuclear Engineering at The Pennsylvania State University is seeking applicants for the William E. Diefenderfer Chair in Mechanical Engineering. Attached is a flyer for your information. Please let me know if you have any questions.

Sincerely

Aman Haque