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 43 for “"Structural Dynamic"”.
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Parametric identification of nonlinear structural dynamic systems
The identification of linear structural dynamic systems has been dealt with extensively in past studies. Identification methods for nonlinear structures have also been introduced in previous articles, including procedures based on the method of multiple scales, iterative and noniterative direct …
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Improvement of structural dynamic models via system identification
Proper mathematical models of structures are beneficial for designers and analysts. The accuracy of the results is essential. Therefore, verification and/or correction of the models is vital. This can be done by utilizing experimental results or other analytical solutions. There are different …
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The effects of ambient temperature variations on structural dynamic characteristics
The precise and detailed characterization of the dynamic response of structures has become increasingly important in recent years. As a consequence, the accuracy of experimental data, which is often used to validate and update finite element models, has become extremely important. However, as …
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Piezoelectric active sensor and electric impedance approach for structural dynamic measurement
… smart material systems and structures, such as structural dynamic measurement analysis, structural damage detection, active structural vibration and acoustic control, etc. Presented in this thesis is a new electromechanical approach for structural dynamic analysis. It uses PZT patches bonded on …
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Advances in iterative learning control with application to structural dynamic response reconstruction
Iterative learning control (ILC) is a repetitive control scheme that uses a learning capability to improve the tracking accuracy of a desired test system output over repeated test trials. ILC is sometimes used in response reconstruction on complex engineering structures, such as ground vehicles, …
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Coupling of Structural Dynamic and Acoustic Analyses Using the FEM and BEM
<p>Noise from structural vibration is a major consideration in the design and manufacturing of a product, such as an automobile, airplane, and other consumer goods. Acoustic simulation is an important step to optimize the performance of many new products early in the design stage rather than …
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Capturing the impact of model error on structural dynamic analysis during design evolution
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2001.
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Online Joint Identification of Structural Dynamic Response Anomalies and Structural Damage Using Limited Data
Structural Health Monitoring (SHM) systems aim to enable real-time assessment of structural conditions by continuously collecting structural response data through sensor networks, while leveraging advanced techniques for data processing and analysis. However, their practical application remains …
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Vision-based robust structural dynamic monitoring and modal identification using stationary and drone-based imaging systems.
Structural health monitoring (SHM) plays a critical role in assessing and managing the condition of the civil infrastructure and prevents sudden closures or catastrophic failure of the structures by timely detection of ongoing degradations. Vision-based SHM has emerged as a promising non-contact …
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Reconstruction of 3-D structural dynamic response fields: an experimental, laser-based approach with statistical emphasis
… reconstruction methodology for continuous 3-D dynamic response fields of harmonically excited structures in steady-state vibration. This results in an experimental process which reconstructs the response field from a set of 3-D projections based on Laser-Doppler-Vibrometer (LDV) localized …
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Estudo de algoritmos de integração direta para análise dinâmica estrutural
… methods) used for the numerical solution of the Structural Dynamic Equations. The structural systems analyzed were assumed to be linear and were modelled by the Finite Element Technique. Besides an example of application in Engineering some examples were shown to compare the direct integration …
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Analysis of vibration reduction via local structural modification
As a new technique for structural dynamic analysis, local structural modification is playing a more and more important role in solving practical engineering problems. This thesis develops methods for vibration reduction via local structural modification. In this thesis, the reduction of unwanted …
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Computation Of The Response Of Thin Piezoelectric Films
… frequency, harmonic, and spectrum analysis. The structural analysis data of the shell substrate is imported into Matlab for further processing using numerical differentiation and integration. The processed data is then used to calculate the film output charge assuming that the piezoelectric film …
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A numerical simulation of multiple-shaker model testing
… has been developed for the simulation of structural dynamic modal testing by the method of steady-state sinusoidal excitation by discrete shakers. An analytical method commonly known as Asher's Method was employed to optimize the shaker forceamplitude distributions for the purpose of …
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Modelling approaches for the low-frequency analysis of built-up structures with non-deterministic properties
… and also gain some physical insight for a structural dynamic problem with non-deterministic properties. Furthermore, several contributions are made to simulation methods that are usually applied in connection with the CMS approach. Different concepts for non-deterministic modal …
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Methodology for innovative health monitoring of aerospace structures using dynamic response measurements and advanced signal processing techniques
… work is to develop an innovative system for Structural Health Monitoring (SHM) of aerospace composite structures based on dynamic strain measurements in order to identify in an exhaustive way the structural state condition. Fiber Bragg Grating (FBG) optical sensors will be used for the …
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Avaliação da influência do acoplamento de risers no movimento de jogo de um FPSO
… evaluation of the motions of the hull and the structural dynamic behavior of the subsea lines are usually made in different steps of the design, so that the dynamic interaction between the two physical domains is rarely considered. Descriptions of the analysis methodologies and the theories …
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Online learning algorithm for structural control using magnetorheological actuators
… properties of their fluid. When considering structural control, classical theories necessitate full knowledge of the structural dynamic states and properties most of which can only be estimated when considering large-scale control, which may be difficult or inaccurate for complicated …
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Vibrations of an isolated wind turbine blade using the finite element method
… is rotating in a vertical plane to determine its structural dynamic characteristics. The equations of motion are formulated for a rotating beam with flap and lead-lag degrees of freedom subjected to nonsymmetric bending. Using a variational approach, a blade finite clement is developed from these …
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The application of parallel computer technology to the dynamic analysis of suspension bridges
… technology to the solution of non-linear structural dynamic problems, in particular the onset of aerodynamic instabilities in long span suspension bridge structures, such as flutter which is a catastrophic aeroelastic phenomena. The thesis is set out in two distinct parts:- Part I, …
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