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 36 for “"Beam structures"”.
-
Physics Informed Learning for Dynamic Modeling of Beam Structures
North Carolina State University Theses Mechanical and Aerospace Engineering.
-
On the buckling finite element analysis of beam structures
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
-
Optimization of composite box-beam structures including effects of subcomponent interaction
… mass designs are obtained for a simple box beam structure subject to bending, torque and combined bending/torque load cases. These designs are obtained subject to point strain and linear buckling constraints. The present work differs from previous efforts in that special attention is payed …
-
Numerical Modeling and Analysis of Composite Beam Structures Subjected to Torsional Loading
… solve the torsion problem of laminated composite beams. Instead of following the classical Saint Venant theory formulation, the notion of effective elastic constant is utilized. This approach uses the concept of elastic constants, and in this context the three-dimensional non-homogeneous …
-
Shear strength of reinforced concrete wall-beam structures: upper- bound analysis and experiments
… failure in reinforced concrete (R. C.) wall-beam type structures when subjected to in-plane loading. The upper-bound approach is emphasised. Present shear design practice (e.g. BS8110:1985) relies much upon empirical solutions, but it is inadequately Substantiated by theoretical analyses when …
-
Modeling and response analysis of thin-walled beam structures constructed of advanced composite materials
Thin-walled beam structures are adopted as structural members in various fields of modem technology including aeronautical/aerospacial, naval, mechanical and civil ones. With the advent of advanced composite material systems, there is a vital need to reformulate the classical theory of thin-walled …
-
Characterization of laser noise in free-free beam structures using a Scanning Laser Doppler Vibrometer
… to measure the dynamic response of vibrating structures. Essential in the optimal use of such a device is an understanding of the idiosyncrasies and operating parameters which may affect the quality of the experimental data. Specifically, the quality of the data taken with an SLDV system may …
-
Extraction of eigen-pairs from beam structures using an exact element based on a continuum formulation and the finite element method
… structure eigenvalues and eigenvectors. An exact beam-element dynamic-stiffness formulation is presented for a plane Timoshenko beam with rotatory inertia. This formulation is based on a converted continuum transfer matrix and is incorporated into a typical finite element program for …
-
Aspects of vibration in bridge-girders
… of cantilevers, simply supported and continuous beam structures. Different methods are used, such as classical, energy and matrix methods. Effects of mass lumpings are investigated. A literature review is given for the general problem of dynamic behaviour of highway bridges, including the passage …
-
A micromachined silicon vibrating-beam angular rate sensor : a design and implementation study
Design and Implementation of a Silicon-Beam Angular Rate Sensor is studied. The sensing device is designed based on a micromachined single crystal silicon beam. Electromagnetic actuation supplies the reference vibration, and the Coriolis-induced vibration is sensed by a capacitor plate in close …
-
Asymptotic Wave Solutions for Euler-Bernoulli and Timoshenko Beam by Ray Method and Stationary Phase Method
… of flexural (bending, transverse) waves in beam structures is of basic importance in the stress wave theory and has been studied for many years. Many methods have been attempted to understand the flexural waves in beams based on Euler-Bernoulli and Timoshenko beam theories. Accurate …
-
Study of Condition Monitoring of Bridges Using Genetic Algorithms
… detailed level defined as the fracture damage in beam structures are successfully determined.
-
Finite Element Simulation Of Repair Of Delaminated Composite Structures Using Piezoelectric Layers
… aeronautical, mechanical, civil and offshore structures often results from factors such as fatigue, corrosion and accidents. Such damage when left unattended can grow at an alarming rate due to the singularity of the stress and strain in the vicinity of the damage. It can lead to increase in …
-
A computer implementation of the static and dynamic analysis of induced strain actuated beams
… and dynamic analysis of induced strain actuated beam structures. A PC-based, user-friendly, menu-driven software program DAISA (Dynamic Analysis of Induced Strain Actuated Beams) has been developed for the analysis of structural response due to induced strain actuation, with a highly …
-
Parametric vibration of composite beams with integrated shape memory alloy elements
… concerned with parametric vibration in composite beam structures with shape memory alloy elements. As a precursor to this investigation, a flexible steel beam of rectangular uniform cross-section is considered with a lumped end mass under a parametric excitation. A single frequency harmonic …
-
Nonlinear Finite Element Analysis of Laminated Composite Beams Subjected to Harmonic Excitations Using a 20 DOF Beam Element
… of antisymmetrically laminated composite beams including shear deformation subjected to harmonic excitation, using a 20-degree of freedom finite element beam. The beam has 10 degrees of freedom at each node: The axial displacements, the transverse deflection due to bending and transverse …
-
An investigation of the effects of curvatures on natural vibration characteristics of curved beams and plates
Curved structures are mostly investigated through the numerical method. In the numerical model, the curved beam or plate is easily simulated by assembled elements. Although the approximate solution can be obtained, numerical results are inadequate to demonstrate the effect of the curvature on the …
-
Enhanced induced strain actuator performance through discrete attachment to structural elements
In intelligent structures, structural deformation is generally controlled by either embedding or surface bonding the induced strain actuator to the structure. With bonded or embedded actuators used for inducing flexure, the developed in-plane force contributes indirectly through a locally-generated …
-
Damage detection methods in bridges through vibration monitoring: evaluation and application
… damage detection methods applied to bridge structures is addressed. Special attention is focused on those methods capable to detect damage only with information provided from a damage stage of the structure. For that purpose, methods based on wavelet analysis, curvature of the mode shapes …
Page 1 of 2