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.
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Showing 1 to 20 of 47 for “"Euler-Bernoulli Beam"”.
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A Study of Shock Analysis Using the Finite Element Method Verified with Euler-Bernoulli Beam Theory; Mechanical Effects Due to Pulse Width Variation of Shock Inputs; and Evaluation of Shock Response of a Mixed Flow Fan
… Using The Finite Element Method Verified With Euler-Bernoulli Beam Theory; Mechanical Effects Due To Pulse Width Variation Of Shock Inputs; And Evaluation Of Shock Response Of A Mixed Flow Fan</p> <p>David Jonathan González Campos</p> <p>For many engineers that use finite element analysis or …
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Active Nonlinear Vibration Control of Engineering Structures of Multiple Dimensions
… typical engineering structures, including Euler-Bernoulli beams and axially moving structures. Nonlinear vibrations wildly exist in engineering structures, such as bridge, aircrafts, micro-electro-mechanical devices, and elevator cables. Comparing to linear vibrations, nonlinear vibrations …
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Nonlinear vibration and chaotic motion of uniform and non-uniform carbon nanotube resonators.
… using the Eringen theory in conjunction with the Euler-Bernoulli beam model and the thermal effect is also considered for the vibration of CNTs. The effects of fluid conveying flow, geometrical nonlinearities and Winkler and Pasternak foundations are studied. Nonlinear equations of CNTs vibration …
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Predictive Simulations of the Impedance-Matched Multi-Axis Test Method Using Data-Driven Modeling
… simulations for the IMMAT performed on a Euler-Bernoulli beam. The results of the simulations reveal that CRI-derived data-driven models of a Euler-Bernoulli beam achieve similar performance when compared to a finite element model and make similar decisions when deciding the excitation …
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A Finite Element, Reduced Order, Frequency Dependent Model of Viscoelastic Damping
… damping of a clamped-free, homogeneous, Euler-Bernoulli beam, and is of a size comparable to the original elastic finite element model. The modal data before reduction compares well with published GHM results, and the modal data from the reduced model compares well with both. The error …
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Nonlinear free vibration of beams by one-dimensional and elasticity solutions
… 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 by comparison with the Euler–Bernoulli beam theory. The impact of …
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Verification and validation of the geometrically exact beam theory with Legendre spectral finite elements for wind turbine blade analysis, A
… turbine blade model in FAST is based on linear Euler-Bernoulli beam theory. A new finite element beam model, BeamDyn, which is based on the geometrically exact beam theory (GEBT) has been proposed to replace the incumbent wind turbine blade model in FAST. In the work reported here, GEBT and its …
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Influence of base isolation on the response of structures to earthquakes
… Moreover, the structure is modeled as an Euler-Bernoulli beam cantilevered on a massive basement. The isolation system is modeled as linear. The stochastic analysis is carried out in the frequency domain using a stationary Clough-Penzien spectral representation for the ground excitation. …
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System Identification of a Cantilever Beam with Interferometer Measurement Using Adaptive Filters
… a piezoelectrically actuated cantilevered beam.</p> <p>The model of the beam including piezo actuators and optical measurement components are established through the Euler-Bernoulli beam theory. From the method of separation of variables, the continuous system is transformed into a discrete …
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Nonlinear Dynamics Analysis and Control of Space Vehicles with Flexible Structures
… flexible appendage is modeled as a cantilevered Euler-Bernoulli beam. Discretization techniques, such as the assumed modes method and the finite element method, are used to model the coupled dynamics by transforming the partial differential equations of motion into a finite set of differential …
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Using Macro-Fiber Composite Actuators for Aquatic Locomotion
… system is built upon a composite cantilever beam with MFC actuators in bimorph configuration. The MFC actuators excite the composite beam near its fundamental natural frequency to produce thrust as the vibration transfers momentum to the surrounding fluid. An analytical model that …
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Higher Order Immersed Finite Element Methods for Interface Problems
… limited to, the elliptic interface problem, the Euler-Bernoulli beam interface problem, the parabolic interface problem, the transport interface problem, and the acoustic interface problem. In the second part, we develop a new m-th degree finite element space based on the differential geometry of …
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Dynamical systems analysis of electrostatic and aerodynamic forced vibrations of a thin flexible electrode
… vibrations are small, then a non-linear dynamic Euler-Bernoulli beam equation with viscous damping and gravitational effects is used to model the vibrations of the dynamical system. Aerodynamic forcing is modeled as a temporally sinusoidal and uniform force acting perpendicular to the beam …
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Active vibration control of composite structures
The vibration control of composite beams and plates subjected to a travelling load is studied in this dissertation. By comparing the controlled as well as uncontrolled responses of classical and refined structural models, the influence of several important composite structure properties which are …
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Using Reinforcement Learning and Bayesian Optimization on Problems in Vehicle Dynamics and Random Vibration Environmental Testing
… and the window size for the moving-average. An Euler-Bernoulli beam and the Box Assembly with Removable Component (BARC) structure were used in simulation and experiment, respectively, to demonstrate improvement in the convergence of MPCA over the baseline performance. In the experimental …
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Experimental investigation of inclined cantilever beams in vertically falling soap films
… investigate the dynamic response of cantilever beam at various angles of attack using theory and experiments. The problem is motivated by separate wind tunnel experiments using energy producing piezoelectric cantilevers. Assuming small vibrational amplitudes, we utilize the Euler-Bernoulli beam …
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Tensile Properties of Single Vaginal Smooth Muscle Cells
… force/stress data were calculated using Euler-Bernoulli Beam Theory and by making simplifying geometric assumptions. The average initial and total elastic moduli (mean ± SEM) for single vaginal SMCs were 6.06 ± 0.26 kPa and 5.4 ± 0.24 kPa, respectively, which is within the range reported …
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On falling spheres : the dynamics of water entry and descent along a flexible beam
… the motion of a sphere on an inclined flexible beam. A theoretical model based on Euler-Bernoulli beam theory is developed to describe the dynamics, and in the limit where the beam reacts instantaneously to the loading, we obtain exact solutions for the sphere trajectory and descent time. For …
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Laser-based broad-band spatially dense automated data acquisition system
… and spatial density. The system moves the laser beam, collects and downloads data for the specified area and spatial density. The system post-processes the data compensating the measurements for calibrations and then computes the complex-valued Frequency Response Function (FRF), and coherence …
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Peridynamics and Applications
… including dynamic responses of a bar and of a beam. The analytical solution to the vibration of the bar is derived through a Taylor series expansion approximation. Numerical examples demonstrate the nonlocal dynamic behavior of the bar and its consistency, in the limit, with local behavior. …
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