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 FORTRAN (Computer program language)<br />Insulation (Heat)<br />Mathematical optimization  Data processing (1)
 Acoustic filters<br />Sound  Transmission (1)
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Articles 1  17 of 17
FullText Articles in Mechanical Engineering
The Analysis Of RSSR Spatial FourBar Mechanism, David Perng Chyi
The Analysis Of RSSR Spatial FourBar Mechanism, David Perng Chyi
Masters Theses
"Although many methods are known for the kinematic analysis of spatial mechanisms, such as descriptive geometry, vector analysis, dual number theory, matrices, screw calculus, and various other methods, a better way to analyze the specific RSSR fourbar mechanism is to use tensor methods in order to eliminate the apparently formidable and tedious tasks of mathematically formulating problems and obtaining solutions. The analysis described in this paper is developed basically by using tensor notations and operations, and the calculations take advantage of the capabilities of modern digital computers. A FORTRAN program for the IBM 360 Data Processing System which will analyze ...
A Theoretical Analysis Of The Free Vibrations Of A Clamped Circular Plate With Damping, Bhalchandra Krishnaji Vaidya
A Theoretical Analysis Of The Free Vibrations Of A Clamped Circular Plate With Damping, Bhalchandra Krishnaji Vaidya
Masters Theses
"A theoretical analysis of the free vibrations of a clamped circular plate was undertaken. The effects of transverse shear were considered for application to relatively thick plates in which there exist sharp transients and frequencies corresponding to higher modes. The method adopted by R. D. Mindlin was used to develope [sic] the differential equation of motion for the plate. The damping effect due to the resistance of the medium in which the plate vibrates was also considered. This damping was assumed to be due to the generation of pressure waves caused by the displacement of the plate...Since the solution ...
Film Boiling From Inclined Flat Surfaces, Charles Ernest Price
Film Boiling From Inclined Flat Surfaces, Charles Ernest Price
Masters Theses
"The object of this investigation was to determine the effect of inclination on the heat transfer for saturated film pool boiling from a flat plate heater. Nitrogen at atmospheric pressure was used as the test fluid. The test plate was oriented at various angles from the horizontal position and the convective film coefficient was determined for each angle. Tests were conducted for heater angles of 0°, 30°, 60°, and 90°. The heater strip was placed in a container of the liquid and was heated electrically. Heat transfer results were obtained for plate temperatures ranging from 100 to 800°F. As ...
Experimental Determination Of Dynamic Properties Of Aluminum Including Poisson's Ratio, Terry Lee Holman
Experimental Determination Of Dynamic Properties Of Aluminum Including Poisson's Ratio, Terry Lee Holman
Masters Theses
"Two rods of 7075T651 aluminum are longitudinally impacted to investigate the material's dynamic properties. The test rod, initially at rest, is instrumented with strain gages to record the straintime history after the impact rod, accelerated to uniform velocity by an air gun launcher, strikes the test rod. A camera records the straintime pattern displayed on an oscilloscope. The experiment indicates a consistent rise time of approximately 9 µsec. Simple onedimensional theory correlates well with the experimental data. Compensation is included for the transverse sensitivity of the gages used. The dynamic values for both the modulus of elasticity and Poisson ...
A Comparison Of Lumped Parameter Models Commonly Used To Describe OneDimensional Vibration Problems, Suresh Kumar Tolani
A Comparison Of Lumped Parameter Models Commonly Used To Describe OneDimensional Vibration Problems, Suresh Kumar Tolani
Masters Theses
"Three lumped parameter model representations of the onedimensional uniform continuous system in a vibration state are examined. The exact (continuous) solutions were used as a reference to evaluate the accuracy of the results obtained via these discrete element models. The model comparisons, carried out for both the principal modes and the systems under forced excitations, are based on the maximum strain energy. The effect of varying the number of segments in the model representation showed improvement in approximating the exact strain energy solution as the number of segments was increased. In general, the results of the model comparisons based on ...
A Finite Element Method For Geometrically Nonlinear Large Displacement Problems In Thin, Elastic Plates And Shells, Ronald August Melliere
A Finite Element Method For Geometrically Nonlinear Large Displacement Problems In Thin, Elastic Plates And Shells, Ronald August Melliere
Doctoral Dissertations
"A finite element method is presented for geometrically nonlinear large displacement problems in thin, elastic plates and shells of arbitrary shape and boundary conditions subject to externally applied concentrated or distributed loading. The initially flat plate or curved shell is idealized as an assemblage of flat, triangular plate, finite elements representing both membrane and flexural properties. The 'geometrical' stiffness of the resulting eighteen degreeoffreedom triangular element is derived from a purely geometrical standpoint. This stiffness in conjunction with the standard small displacement 'elastic' stiffness is used in the linearincremental approach to obtain numerical solutions to the large displacement problem. Only ...
Dynamic Response Of Circular Plates To Transient And Harmonic Transverse Loads Including The Effect Of Transverse Shear And Rotary Inertia, Perakatte Joseph George
Dynamic Response Of Circular Plates To Transient And Harmonic Transverse Loads Including The Effect Of Transverse Shear And Rotary Inertia, Perakatte Joseph George
Doctoral Dissertations
"Using an improved theory of plate vibration suggested by R. D. Mindlin which takes into account the effects of transverse shear and rotary inertia, free and forced transverse vibrations of uniform circular plates are studied and the results compared with those obtained using the classical theory of plate vibration. The governing equations are developed in polar coordinates using the equations of elasticity. Frequency equations for axisymmetric and antisymmetric vibrations are derived for solid circular plates under different boundary conditions and for an annular plate rigidly mounted on a shaft. The response of plates to different types of rapidly applied axisymmetric ...
Investigation Of Free Convection Heat Transfer From An Inclined Flat Plate, Phairojna SangUrai
Investigation Of Free Convection Heat Transfer From An Inclined Flat Plate, Phairojna SangUrai
Masters Theses
"The experimental investigation was conducted to determine temperature distribution and convective heat transfer coefficients in terms of Nusselt number for an inclined heated flat plate in air. The heated surface of the aluminum flat plate was set facing upward and moved through seven positions from the vertical to the horizontal. The investigation shows that the local Nusselt number can be predicted by Kiekus's solution within 12 per cent for inclination angles from the vertical through 75° from the vertical. In the case of the vertical position, Eckert's solution gives a better prediction. For the horizontal position the results ...
Analysis Of A Water Level Control, Bhupendra Girdharlal Shah
Analysis Of A Water Level Control, Bhupendra Girdharlal Shah
Masters Theses
"This thesis presents the analysis of a controller for a liquid level control system. The controller was built using an analog computer providing the ability to easily construct up to three modes of control. The controllers analyzed were: 1.) Proportional, 2.) Proportional plus reset, and 3.) Proportional plus reset plus preact. The system was tuned experimentally to provide satisfactory operation and root loci were also plotted to show the system stability for the three modes"Abstract, page ii.
Application Of Approximate Transmission Matrices To Describe Transverse Beam Vibrations, Ranjit Kumar Roy
Application Of Approximate Transmission Matrices To Describe Transverse Beam Vibrations, Ranjit Kumar Roy
Masters Theses
"This paper is a report of an investigation of an approximate method for finding the principal mode frequency roots for beams in transverse vibration. The method utilizes approximate transmission matrices obtained by a power series expansion of the basic differential equation which governs the transmission matrix. Investigation has been carried out to examine the efficiency of the method in producing the first several normal mode frequency roots. This has been achieved by applying the method to several uniform and nonuniform beams and comparing the results with the exact solutions. The technique has further been applied to nonuniform beams of tapered ...
A Computerized Method For Finding The Dynamic Response Of MultiMass Systems With Damping To Arbitrary Inputs, Bakulesh Balbhadra Patel
A Computerized Method For Finding The Dynamic Response Of MultiMass Systems With Damping To Arbitrary Inputs, Bakulesh Balbhadra Patel
Masters Theses
"A practical procedure for the systematic application of Foss's method to the solution of multidegreeoffreedom damped systems is presented. It is relatively easy to determine the response of classically damped systems to various inputs. For nonclassically damped systems the method proposed by K. A. Foss has been employed. This method gives an exact and complete solution for the response of linear multimass damped systems subjected to arbitrary inputs. Since the method requires lengthy and complex computations, the use of a digital computer is essential. In order to obtain the complete response of a multimass damped system to both sinusoidal ...
Apparatus And Techniques For The Plane Wave Analysis Of Acoustic Filters, Victor Hugo Simon
Apparatus And Techniques For The Plane Wave Analysis Of Acoustic Filters, Victor Hugo Simon
Masters Theses
"This thesis describes a method for determining the reflection and transmission characteristics of acoustic filters under static (i.e. no flow) conditions. These characteristics are obtained by the combination of linear plane wave acoustic theory with a sequential experimental procedure. The experimental data necessary for the calculation of the reflection characteristics were obtained from measurements made on the inlet side of the filter with a standing wave tube apparatus. In order to calculate the transmission characteristics of the filter, the standing wave measurements were augmented with measurements taken on both the inlet and outlet side of the filter. This was ...
Method For Optimizing MultiLayer Insulation, William Donald Morath
Method For Optimizing MultiLayer Insulation, William Donald Morath
Masters Theses
"The use of multilayer insulation can result in reduced material cost, weight, or volume. A method for selecting layer materials is described. Each layer material is selected to operate at its upper temperature limit and to contribute to the overall performance of the wall. The analyses required for optimizing flat and cylindrical walls are developed. Use of the digital computer makes it feasable [sic] to select layer materials from a large group of candidates. Fortran IV programs for optimizing flat and cylindrical walls are presented, and their use is demonstrated by the solution of example problems. Methods for improving the ...
Design Of RCCR Spatial Mechanism, KaoChien Hsei
Design Of RCCR Spatial Mechanism, KaoChien Hsei
Masters Theses
"An analysis to design a particular RCCR spatial mechanism was developed using tensor notations and operations. This specific RCCR spatial mechanism can be used to couple two shafts intersected at a skew angle with constant rotating speed ratio. This skew angle, or bending angle of the two shaft, may vary from 30 up to 180 degrees. The governing equations of relative positions of the mechanism were formulated as a function of two variables: the bending angle of the shafts and the rotating angle of the input link. To exemplify the various design conditions, the design parameter versus the bending angle ...
The Design Of A Direct Current Generator Field Controller, Melvyn Elwin Downs
The Design Of A Direct Current Generator Field Controller, Melvyn Elwin Downs
Masters Theses
"A controller was built utilizing transistors and silicon controlled rectifiers to allow torque control of the General Electric dynamometer, type TLC50. The current gain of the controller was approximately 10⁶ such that the field current could be controlled by an input current of zero to approximately two microaaperes. The transfer function for the controllerdynamometer system was experimentally determined. The results indicate that the gain of the open loop torque control system is constant for frequencies up to 1.1 radians per second. Satisfactory values of gain for proportional and proportional plus integral control, were experimentally determined by operating the closed ...
Dynamic Response Of A Gyrocompass, Subhash Govind Kelkar
Dynamic Response Of A Gyrocompass, Subhash Govind Kelkar
Masters Theses
"A gyrocompass with three degrees of freedom is studied and an attempt made to solve the exact equations of motion numerically. The equations are obtained by using the Lagrange formulation of the problem. The kinetic energy and the potential energy of the system are determined from the energies of the various components. These are then substituted into Lagrange's equation to obtain the three equations of motion for the three angular coordinates. As few restrictive assumptions as possible are made during this development. From these exact equations of motion an approximate analytical solution is obtained by making several assumptions and ...
The Use Of Turbulence Energy Equation In Boundary Layer Study, RoChi Tai
The Use Of Turbulence Energy Equation In Boundary Layer Study, RoChi Tai
Masters Theses
"A turbulent boundary layer problem has been studied analytically and compared with an available experiment in the literature. Correlations of the experimental data were made to investigate the validity of the commonly used empirical relations on turbulent shear stresses. It was found that the model which related the local turbulent shear stress linearly with the local turbulent kinetic energy, as used by Bradshow et. al., appeared to be most reasonable. combining this model with the expression of turbulent viscosity given by Boussinesq, it was then possible to introduce the turbulenceenergy equation in addition to the governing equations of continuity and ...