ECE DOCTOR OF PHILOSOPHY DISSERTATION DEFENSE BY: John C. Cochran
When: Wednesday,
April 25, 2018
10:00 AM
-
12:00 PM
Where: Science & Engineering Building, Lester W. Cory Conference Room: Room 213A
Cost: Free
Description: Topic: The General Theory of the Slotted Cylinder Projector (SCP) Transducer with Non-Uniform Velocity Distributions
Location: Lester W. Cory Conference Room, Science & Engineering Building (SENG), Room 213A
Abstract:
Electroacoustic piezoelectric transducers are used for underwater acoustics applications and there is a particular interest in compact low frequency source transducers. The thesis addresses the theory for the Slotted Cylinder Projector (SCP), a low frequency flexural mode device comprising a piezoelectric driver and a cylindrical passive shell with an axial slot. The thesis improves upon current work that addresses the uniform wall SCP with a general theory that explains the performance of both the uniform wall SCP and the tapered wall SCP. Tapering the shell thickness is shown to offer benefits to the electro-mechanical-acoustic performance. The second contribution to the field is a general approach for calculating the radiation impedance of radiating sources that have non-uniform velocity profiles. These two topics are addressed and then combined to provide a general theory for the analysis of the class of Slotted Cylinder Projector transducers.
NOTE: All ECE Graduate Students are ENCOURAGED to attend.
All interested parties are invited to attend. Open to the public.
Advisor: Dr. David A. Brown
Committee Members: Dr. John R. Buck and Paul J. Gendron, Department of Electrical & Computer Engineering; Dr. Corey L. Bachand, BTech Acoustics, LLC
*For further information, please contact Dr. David A. Brown at 508.999.8479, or via email at dbrown@umassd.edu.
Location: Lester W. Cory Conference Room, Science & Engineering Building (SENG), Room 213A
Abstract:
Electroacoustic piezoelectric transducers are used for underwater acoustics applications and there is a particular interest in compact low frequency source transducers. The thesis addresses the theory for the Slotted Cylinder Projector (SCP), a low frequency flexural mode device comprising a piezoelectric driver and a cylindrical passive shell with an axial slot. The thesis improves upon current work that addresses the uniform wall SCP with a general theory that explains the performance of both the uniform wall SCP and the tapered wall SCP. Tapering the shell thickness is shown to offer benefits to the electro-mechanical-acoustic performance. The second contribution to the field is a general approach for calculating the radiation impedance of radiating sources that have non-uniform velocity profiles. These two topics are addressed and then combined to provide a general theory for the analysis of the class of Slotted Cylinder Projector transducers.
NOTE: All ECE Graduate Students are ENCOURAGED to attend.
All interested parties are invited to attend. Open to the public.
Advisor: Dr. David A. Brown
Committee Members: Dr. John R. Buck and Paul J. Gendron, Department of Electrical & Computer Engineering; Dr. Corey L. Bachand, BTech Acoustics, LLC
*For further information, please contact Dr. David A. Brown at 508.999.8479, or via email at dbrown@umassd.edu.
Contact:
ECE: Electrical & Computer Engineering Department 508.999.9164 http://www.umassd.edu/engineering/ece/
Topical Areas: General Public, University Community, College of Engineering, Electrical and Computer Engineering