Global ETD Search
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Showing 1 to 7 of 7 for “"Structural Acoustic Coupling"”.
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The influence of structural-acoustic coupling on the dynamic behaviour of a one-dimensional vibro-acoustic system
The aim of this thesis is to investigate the structural-acoustic coupling effects on the dynamic behaviour of a vibro-acoustic system under passive/active control. The simplest model of a vibro-acoustic system one can consider is a one-dimensional acoustic cavity driven by a …
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Advanced sensing techniques for active structural acoustic control
… in achieving adaptive structures for active structural acoustic control (ASAC). Test structures studied in this work included a baffled simply supported beam and a baffled simply supported plate which were subjected to a harmonic input disturbance created physically with a shaker and modelled …
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Active control of interior noise using piezoelectric actuators in a large-scale composite fuselage model
… wall while error information from the interior acoustic field is sensed by microphones. A preliminary analytical development was conducted to investigate the mechanisms of the structural/acoustic coupling exhibited by a simple cylindrical model in order to gain more inSight into the coupling …
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System Identification and Optimization Methodologies for Active Structural Acoustic Control of Aircraft Cabin Noise
… structures via active control techniques. Active Structural Acoustic Control (ASAC) has shown much promise for reducing interior cabin noise in aircraft by applying control forces directly to the fuselage structure. Optimal positioning of force actuators for ASAC presents a challenging problem …
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Effect of grazing flow on structural-acoustic response of an elastic plate with sound in a duct
… and accurate prediction of the coupled structural-acoustic response of thin panels subjected to sound waves are key elements of this design process. Due to the cost of in-flight testing, the experimental assessment of the structural-acoustic response of skin panels is usually conducted …
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An Energy Diffusion Model for Interior Acoustics with Structural Coupling Using the Laplace Transform Boundary Element Solution
… sound has many important applications including acoustic prediction in homes, office buildings, stores, and schools, and the design of concert halls, auditoriums, classrooms, and factories. At low frequencies, interior acoustics are analyzed with the wave equation, but significant computational …
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Dynamics and Control of a Pressurized Optical Membranes
… of optical membranes with an innovative, acoustical control approach to suppress vibration of optical membranes backed by an air cavity. This is achieved by using a centralized acoustic source in the cavity as the method of actuation. The acoustic actuation is of great interest since it …