Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 43 for “"transfer matrix method"”.
-
Computer aided analyses of symmetrically loaded thin cylindrical shell using transfer matrix method
… loaded thin cylindrical shell structures using transfer matrix method. A shell is a body bounded by a double curved surface, the thickness of the shell generally being smaller than its radius. A shell is classified thin if the ratio of the thickness to radius is less than twenty. The analyses of …
-
Development of a [i.e. an] engineering design procedure for a complex revolute joint
… developed that combine both the finite element method and the transfer matrix method in design. These procedures were drawn up as a result of the analysis of a large continuous mining machine to be produced by Fairchild International. Combining the methods allowed the analysis to be split into …
-
Vibration suppression in finite length marine cable systems
… marine cable vibration absorber is studied. The transfer matrix method is used to build various numerical models of vibration absorbers in marine cable systems. The models determine cable system natural frequencies, mode shapes and modal damping ratios. The introduction of absorber damping is …
-
Structural modification utilizing beam elements
… combines the Dual Modal Space Modification Method (DMSM) and the Transfer-Matrix Method to institute general beam modifications. The DMSM method is employed to implement the beamtype modification, while the transfer-matrix method is used to formulate the modification element. The use of …
-
Influence of active magnetic bearing sensor location on the calculated critical speeds of turbomachinery
… design has created the need for a more accurate method for predicting the system's undamped critical speeds. This thesis documents the development of a method which improves the accuracy of critical speed calculation by properly accounting for the influence of AMB sensor location on the undamped …
-
Análise estática de placas pelo método combinado elementos finitos - matriz de transferência
This work deals with the combined finite element-transfer matrix method. The main advantage of this method is to reduce the size of matrices envolved in the analysis which is useful in microcomputers with little RAM memory. Herein this method is used for static analysis of isotropic retangular …
-
Extraction of eigen-pairs from beam structures using an exact element based on a continuum formulation and the finite element method
Studies of numerical methods to decouple structure and fluid interaction have reported the need for more precise approximations of higher structure eigenvalues and eigenvectors than are currently available from standard finite elements. The purpose of this study is to investigate hybrid finite …
-
Studies of protein designability using reduced models
… the first part of the thesis we extend the transfer matrix method to the 2D triangular lattice. The transfer matrix method is a highly efficient method of enumerating all conformations within a compact lattice area that has earlier been developed for the 2D square and 3D cubic lattices. In …
-
modeling and application of nonlinear metasurface
… of nonlinear metasurfaces. Analytical methods - transfer matrix method and surface homogenization method - for characterizing nonlinear metasurfaces are presented. A generalized transfer matrix method formalism for four wave mixing is derived, and applied to analyze nonlinear interface, …
-
Computer Aided Analysis of Smoke Stack Designs
… stack analysis. This analysis code utilizes the transfer matrix method to perform detailed bending and vibration analyses. This new software has been developed to check stack designs for compliance with appropriate steel stack standards, and provide the designer with information regarding the …
-
An analytical study and computer analysis of three-dimensional, steady-state vibration of multishaft geared-rotor systems
A unique multifrequencied transfer matrix method performs three-dimensional harmonic, steady-state response calculations on geared-rotor systems. The full six degrees-of-freedom method includes physical branching to accommodate multiple shafting and frequency branching to simultaneously accommodate …
-
Computer-Aided Design Software for the Undamped Two-Dimensional Static and Dynamic Analysis of Beams and Rotors
… and frequency response analyses of a system. The Transfer Matrix Method has been used in the development of the software and an explanation of the method is included in this thesis. Mathematical problems and solutions encountered while developing 2DBEAM are also documented in this study. The code …
-
MULTICOLOR INFRARED DETECTION USING STEP QUANTUM WELLS
… transition in arbitrary shape quantum wells, a transfer matrix method with effective mass approximation has been constructed. The energy states and intersubband transitions are discussed theoretically with the help of this method. This method was used to design the detector structure with step …
-
Torsional-axial coupling in the line shafting vibrations in merchant ocean going ships
… no details regarding propeller coupling. The method used in the analysis is transfer matrix method, which suits well the rotor systems on modern ocean going ships. Vibration coupling computation is then performed using finite element method to demonstrate the importance of obtaining …
-
Structural Monitoring With Fiber Bragg Grating Strain Sensor Array and Optical Frequency Domain Reflectometry
… using in-house software that incorporates transfer matrices. Compared to the previous techniques used, the transfer matrix method allows a system wide approach to modeling the FBGA/C-OFDR system.In the second half of this work, a cavity interference suppression method is used to suppress …
-
Temperature and Spatial Hole Burning Effects in Semiconductor Lasers and Integrated Optical Devices
… laser diodes is analyzed using a consistent method involving gain and spontaneous emission measurements to isolate the temperature-sensitive effects. Second, longitudinal spatial hole burning is examined theoretically and experimentally in both Fabry-Perot and index-coupled …
-
Uniaxial optical phase change metamaterials
… the basis of effective medium theory (EMT) and transfer matrix method (TMM). The findings in this paper demonstrate that broadband wavelength regions of high reflectance, high birefringence, and zero-crossing birefringence can be found and tuned as a function of material thickness and fill …
-
Study of Wave Propagation in Damaged Composite Material Laminates
… resulted in the need for nondestructive testing methods that can provide quick, reliable results so that these parts can be tested while in service. In this study, an approach was examined that involved a pencil lead break to excite multiple wave modes in a composite plate in an effort to …
-
Modelling the sound insulation of corrugated roof structures : an extended transfer matrix approach
Over the course of this work, the transfer matrix method (TMM) was implemented and studied for its potential in predicting the sound insulation characteristics of corrugated dual leaf roof structures. A model of periodically connected plates, using Fourier expansions, was derived independently and …
-
Study of the effect of sensor position on the forced response characteristics of rotors with active magnetic bearings
… research presents a modification of existing transfer matrix methods for rotor analysis, to predict the response of rotor systems with active magnetic bearings. The position of the magnetic bearing sensors is taken into account and the effect of changing sensor position on the vibrational …
Page 1 of 3