Sound and Vibration from Inhomogeneous Shells with Complex Turbulent Pressure Forcing
Abstract
This proposal describes a new research program for the study of flow-induced sound and vibration of thin shells. The problem described incorporates elements of complex, inhomogeneous, separated turbulent flow forcing in combination with thin, fluid-loaded, cylindrical shells with stiffness and mass discontinuities. The lack of symmetry created by the forcing and shell discontinuities creates extremely complex and difficult physical interactions between the turbulent flow, the vibration, and the radiated sound. The program will focus on creating these complex, yet carefully quantified boundary conditions experimentally. Measurements of flow field characteristics, unsteady surface pressure, shell vibration velocity, and radiated sound will be obtained for a range of inflow conditions and structural modifications. A numerical model of the shell will be implemented and used to compute the mobility functions of the shell. These results will be used to couple the inhomogeneous drive pressures to the shell in order to predict the vibration. The tasks are outlined to cover a 36 month period that will engage the Principal Investigator, a post-doctoral research assistant, and a graduate student.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141512666
Entities
People
- Christopher Morris
Organizations
- Office of Naval Research
- United States Navy
- University of Notre Dame