University of Maryland Vibration & Noise Control Lab. VIRTUAL DESIGN OF QUIET UNDERWATER SHELLS VIRTUAL DESIGN OF QUIET UNDERWATER SHELLS W. Akl and A. Baz University of Maryland Mechanical Engineering Department College Park, MD 20742 Tel: 301-405-5216 e-mail: [email protected]FEMCI Workshop 2003 May 7-8, 2003 NASA Goddard Space Flight Center
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University of Maryland Mechanical Engineering Department ... · University of Maryland Vibration & Noise Control Lab. 110 115 120 125 130 135 140 145 150 dB PlainPlain 7 Stiffeners
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University of Maryland Vibration & Noise Control Lab.
VIRTUAL DESIGN OF QUIET UNDERWATER SHELLSVIRTUAL DESIGN OF QUIET UNDERWATER SHELLS
W. Akl and A. Baz
University of MarylandMechanical Engineering Department
University of Maryland Vibration & Noise Control Lab.
The Glove has six small vibro-tactile stimulators on the fingers and the palm.Each stimulator can be individually programmed to vary the strength of touch sensation.
CYBER TOUCH GLOVES
University of Maryland Vibration & Noise Control Lab.
VIRTUAL DESIGN OF ACTIVE STRUCTURESVIRTUAL DESIGN OF ACTIVE STRUCTURES
TorpedoTorpedo
University of Maryland Vibration & Noise Control Lab.
VIRTUAL DESIGN OF A TORPEDOE SHELLVIRTUAL DESIGN OF A TORPEDOE SHELL
SGI/ONYX2
Computer
Cost & Reliability
Virtual Audio
Structural & Acoustical
FEM
Networking
Optimization
Visualization
Input/OutputDevices
Implementation of virtual reality on SGI/ONYX2 Computer
University of Maryland Vibration & Noise Control Lab.
Actuator Active Rib
Propeller
Nose
Damping
VIRTUAL DESIGN OF ACTIVE TORPEDOESVIRTUAL DESIGN OF ACTIVE TORPEDOES
University of Maryland Vibration & Noise Control Lab.
VIRTUAL DESIGN OF A TORPEDO SHELLVIRTUAL DESIGN OF A TORPEDO SHELL
University of Maryland Vibration & Noise Control Lab.
VIRTUAL DESIGN OF A TORPEDO SHELLVIRTUAL DESIGN OF A TORPEDO SHELL
University of Maryland Vibration & Noise Control Lab.
VIRTUAL DESIGN OF A TORPEDO SHELLVIRTUAL DESIGN OF A TORPEDO SHELL
University of Maryland Vibration & Noise Control Lab.
VIRTUAL DESIGN OF A TORPEDO SHELLVIRTUAL DESIGN OF A TORPEDO SHELL
University of Maryland Vibration & Noise Control Lab.
COLLABORATIVE DESIGN OF A TORPEDO SHELLCOLLABORATIVE DESIGN OF A TORPEDO SHELL
University of Maryland Vibration & Noise Control Lab.
No. of stiffeners = 7, Active Stiffeners: 1,3, 7, Frequency 200 Hz
Gain =0
University of Maryland Vibration & Noise Control Lab.
No. of stiffeners = 7, Active Stiffeners: 1,3, 7, Frequency 200 Hz
Gain =3000
University of Maryland Vibration & Noise Control Lab.
No. of stiffeners = 7, Active Stiffeners: 1,3, 7, Frequency 300 Hz
Gain =0
University of Maryland Vibration & Noise Control Lab.
Gain =3000
No. of stiffeners = 7, Active Stiffeners: 1,3, 7, Frequency 300 Hz
University of Maryland Vibration & Noise Control Lab.
VIRTUAL DESIGN OF A TORPEDO SHELLVIRTUAL DESIGN OF A TORPEDO SHELL
University of Maryland Vibration & Noise Control Lab.
FUTURE APPLICATIONS
Car Crash
Space Structures
Vehicle Dynamics & Acoustics
University of Maryland Vibration & Noise Control Lab.
Virtual Reality Design of Helicopter Noise & Vibration Controls
University of Maryland Vibration & Noise Control Lab.
ActivePatches
Shaker
Scanning arm
Scanning Laser
Fuselage
Stiffeners
Cessna Citation II Fuselage
Engineer
CAVE
University of Maryland Vibration & Noise Control Lab.
ConclusionsConclusionsConclusions
1. Underwater Shells with Active stiffeners are designed using Multi-Disciplinary Optimization (MDO).
2. The optimal design parameters of the Actuator/sensor pairs ( Number, Location & Control Gain) are determined in order to minimize the sound radiation, the structural vibration, weight, production & life cycle cost, control effort & maximize controllability & observability.
University of Maryland Vibration & Noise Control Lab.