Browsing Faculty Works, Department of Mechanical Engineering by Issue Date
Now showing items 1-20 of 261
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Transverse vibrations of double-tapered cantilever beams with end support and with end mass
(Acoustical Society of America, 1974)The free vibrations of a double-tapered cantilever beam with (1) end support and (2) end mass have been investigated using the Bernoulli-Euler equation. The beam was tapered linearly in the horizontal and in the vertical ... -
Prediction of sound pressure levels in irregularly shaped factory spaces
(Acoustical Society of America, 1976)The prediction of sound pressure levels in irregularly shaped factory spaces is approached through an analysis of acoustically coupled rooms. Previous work has indicated that room surface sound absorption characteristics ... -
Sound transmission between absorbing parallel planes
(Acoustical Society of America, 1976)Partially absorbing parallel surfaces can be dominant acoustical feature of many rooms. The sound fields in such rooms are not diffuse, which causes difficulty in predicting sound pressure levels. A method is developed for ... -
Acoustic performance of a stretched membrane and porous blanket combination
(Acoustical Society of America, 1976)The sound absorption performance of an acoustic absorber consisting of a stretched circular membrane placed a short distance in front of a fiberglass blanket was both measured and predicted. Both theoretical and experimental ... -
Prediction of the sound diffracted around barriers in large rooms using an extension of Maekawa's approach
(Acoustical Society of America, 1977)A computer program has been developed for the prediction of sound pressure levels in large, irregular rooms utilizing a geometric acoustics approach. Experiments indicated that the program gave good predictive accuracy ... -
Computer-aided, interactive design routine for the prediction of sound levels in irregularly shaped factory spaces
(Acoustical Society of America, 1977)An interactive computer algorithm is presented which utilizes modified room acoustics theory to predict dBA sound pressure levels in regularly- and irregularly-shaped factory spaces. Irregularly positioned and nonuniform ... -
Temperature-Jump Problem with Arbitrary Accommodation
(AIP Publishing, 1978)A concise and accurate result for the temperature‐jump coefficient based on the linearized BGK model and arbitrary accommodation is reported. The jump coefficient is expressed as a power series in (1‐α), and values of the ... -
A geometric acoustics approach to the study of sound propagation in ducts containing sheared flows
(Acoustical Society of America, 1979-12-01)Geometric acoustics has been used to study the propagation of sound waves in a homogeneous moving medium with sheared flow bounded by the hard walls of a duct. Differential equations describing the ray trajectories and the ... -
Sound transmission between absorbing parallel planes
(Acoustical Society of America, 1980-01-01)Partially absorbing parallel surfaces can be the dominant acoustical feature of many rooms. The sound fields in such rooms are not diffuse, which causes difficulty in predicting sound pressure levels. A method is developed ... -
Heat Transfer in a Rarefied Gas Enclosed Between Parallel Plates: Role of Boundary Conditions
(AIP Publishing, 1982)The influence of boundary conditions of accomodation coefficients and Maxwellian diffuse specular reflection on heat transfer through a rarefied gas enclosed between two parallel plates is examined. An exact expression for ... -
A temperature correlation for the radiation resistance of a thick-walled circular duct exhausting a hot gas
(Acoustical Society of America, 1984-01-01)It is often useful to know the radiation impedance of an unflanged but thick-walled circular duct exhausting a hot gas into relatively cold surroundings. The reactive component is shown to be insensitive to temperature, ... -
Flux formulation of hyperbolic heat conduction
(American Institute of Physics, 1985)The development of the general flux formulation for heat conduction based on the modified Fourier's law is presented. This new formulation produces a hyperbolic vector equation in heat flux which is more convenient to use ... -
Exact Numerical Results for Poiseuille And Thermal Creep Flow in a Cylindrical Tube
(AIP Publishing, 1986-02-01)The F N method is used, in the field of rarefied gas dynamics, to develop a complete solution for the cylindrical Poiseuille flow and thermal creep problems. The linearized Bhatnagar–Gross–Krook (BGK) model and purely ... -
Hyperbolic heat conduction with temperature-dependent thermal conductivity
(American Institute of Physics, 1986-03-15)Hyperbolic heat conduction in a semi-infinite slab with temperature-dependent thermal conductivity is studied numerically, and the results are compared with those obtained from the classical parabolic equation for the ... -
A Simple Model for the Average Local Entrainment Rate
(AIP Publishing, 1986-07-01)A new expression for the mean local entrainment rate in a turbulent intermittent flow is obtained. This expression is used to obtain a simple model for the entrainment rate assuming that an indicator function can be defined ... -
Comparison Of The Measured And Predicted Response Of The Earth Radiation Budget Experiment Active Cavity Radiometer During Solar Observations
(Optical Society of America, 1989-05-01)The Earth Radiation Budget Experiment consists of an array of radiometric instruments placed in earth orbit by the National Aeronautics and Space Administration to monitor the longwave and visible components of the earth's ... -
Modeling of shape memory alloy hybrid composites for structural acoustic control
(Acoustical Society of America, 1991-01-01)Experimental demonstration of active vibration and structural acoustic control using shape memory alloy (SMA) hybrid composites [C. A. Rogers, in Proceedings of the International Congress on Recent Developments in Air and ... -
Characterization of multiple piezoelectric actuators for structural excitation
(Acoustical Society of America, 1991-07-01)The thrust of the present work is to analytically and experimentally study the response of a simply supported beam driven by multiple piezoelectric actuators in an effort to understand distributed excitation of the structure. ... -
Active control of sound radiation due to subsonic wave scattering from discontinuities on fluid-loaded plates. I: Far-field pressure
(Acoustical Society of America, 1991-10-01)Active control of sound radiation due to subsonic wave scattering from discontinuities represented by a line constraint or by a uniform reinforcing rib positioned on a fluid-loaded infinite plate is analytically studied. ... -
Active control of noise transmission through rectangular plates using multiple piezoelectric or point force actuators
(Acoustical Society of America, 1991-11-01)This paper analytically demonstrates the use of multiple piezoelectric actuators bonded to the surface and point force actuators applied directly to a plate to reduce sound transmission through the plate. A harmonic plane ...
