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 90 for “"Free Vibration"”.
-
On the free vibration behavior of cylindrical shell structures
… as cylindrical shell structures. The study of vibrations of cylindrical shells is an important aspect in the successful applications of the cylindrical shells. The free vibration characteristics of a submarine hull have an important influence on the noise signature of the submarine. That makes …
-
Free vibration and stability of complete orthotropic circular toroidal shells
This study makes contributions in the areas of vibration and stability analysis of complete orthotropic circular toroidal shells. It is conducted in four main parts. A literature survey is first carried out indicating the new and continuing uses of toroidal shells in engineering structures. …
-
A Theory for Free Vibration of Anisotropic Shells of Revolution
Made available in DSpace on 2014-12-10T17:25:51Z (GMT). No. of bitstreams: 1 7000995.pdf: 1945757 bytes, checksum: 056bf0db210fca63b177bb5d4716504b (MD5) Previous issue date: 1969
-
Free vibration and nonlinear transient analysis of imperfect laminated structures
The free vibration and nonlinear transient analysis of imperfect laminated structures with emphasis on computational methods for accurate and efficient analysis are studied. The evaluation of interlaminar stresses is also studied by approximating global displacements of laminated plates. Free …
-
Free Vibration Response Comparison of Composite Beams with Fluid Structure Interaction
… testing was conducted to compare the free vibration response of composite beams in air with those in FSI immersed in water. Composite beams with six layers of non-biased, plain weave, 6 oz E-glass were used with two different layer orientations and boundary conditions. Five samples …
-
Nonlinear free vibration of beams by one-dimensional and elasticity solutions
In this research, linear and nonlinear free vibration are examined. A three-dimensional rectangular parallelepiped free–free beam is studied based on the Ritz method. The equation of motion is derived depending on Hamilton's principle. A validation of the Ritz method formulation has been conducted …
-
Static and free vibration analysis of advanced composites using shear-deformable rectangular plate finite elements
… node, and 12 - 27 DOF per element. Static and free vibration analysis of isotropic and laminated plates with thicknesses ranging from extremely thin to very thick are presented, along with a convergence study. The finite element results are compared with the exact plate theory solutions. Of the …
-
Free Vibration of Bi-directional Functionally Graded Material Circular Beams using Shear Deformation Theory employing Logarithmic Function of Radius
… and wind turbine blades. The analysis of free vibrations of curved structures plays a critical role in their design to avoid transient loads with dominant frequencies close to their natural frequencies. One way to increase their areas of applications and possibly make them lighter without …
-
A study of vibrations in rotating laminated composite plates accounting for shear deformation and rotary inertia
… deformation plate theory is used to predict free vibration frequencies in rotating laminated composite plates. The theory accounts for geometric non-linearity in the form of von Karman strains. The plate is permitted to have arbitrary orientation and offset from the axis of rotation. A finite …
-
Testing of the suspended vehicle system scale model
… deflections and an accelerometer to detect vibrational frequencies. The output of ten LVDTs was recorded on either a Sanborn strip chart recorder or a magnetic type recorder. The accelerometer supplied a signal to a real-time frequency analyzer. The testing program consisted of both static …
-
Vibration, buckling and postbuckling of laminated composites with delaminations
Free vibration, buckling and postbuckling analyses of laminated composite plates with multiple delaminations are presented. A fInite element method based on a layer-wise laminated composite plate theory is developed to formulate the problem. Geometric nonlinearity in the sense of von Karman and the …
-
Computer-Aided Design Software for Torsional Analysis
… mass, viscous and structural damping, vibration absorbers, and gear meshes with gear tooth flexibility. The analysis capabilities of the program include forcedresponse and free-vibration analyses. The forced-response analysis module is capable of determining a system’s response to a …
-
Structural damage detection using ambient vibrations
… this research is to use structure ambient random vibration response to detect damage level and location. The use of ambient vibration is advantageous because excitation is caused by service conditions such as normal vehicle traffic on a highway bridge, train passage on a railroad bridge, or wind …
-
Nonlinear vibration analysis of viscoelastic plates with fractional damping
… integrals. In the present study, the nonlinear vibration analysis of a rectangular composite plate with fractional viscoelastic properties has been analytically investigated. The plate is modeled based on the von Kármán plate theory, and the Caputo’s fractional derivative has been utilized to …
-
Vibration Analysis of a Composite Wing Box with Arbitrarily Shaped Spars and Ribs
<p>In this research, the free vibration analysis of composite wing boxes with curvilinear spars and ribs is performed. Modern manufacturing technologies, such as Electron Beam Freeform Fabrication and Friction Stir Welding, have allowed the manufacturing of arbitrarily shaped stiffeners. …
-
Nonlinear static and transient analysis of generally laminated beams
… the thickness, and satisfy the shear stress free boundary conditions at the upper and lower surfaces of the beam. The theories also account for the bend-stretch, shear-stretch, and bend-twist couplings inherent to generally laminated composite beams. Further, a coupling between the shear …
-
The Uniform Hanging Cable as a Translational Vibration Absorber.
The small, lateral vibrations of a system consisting of a uniform cable suspended from a mass in a gravitational field and having a lower end mass are considered in this thesis. The frequencies and modal configurations for free vibration were determined. Secondly, a harmonically varying forcing …
Page 1 of 5