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 11 of 11 for “"damage diagnosis"”.
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Experimental Damage Diagnosis of a Model Three-Story Spatial Frame
Structural damage can be induced by a variety of events from short-term abnormal stresses to long-term natural aging. Detection of changes in a structure's ability to withstand subsequent loads can aid decisions on safety, repair, rehabilitation, and demolition. Dynamic property shifts can show …
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The applicability of neural network systems for the structural damage diagnosis
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Vibration Analysis of Cracked Composite Bending-torsion Beams for Damage Diagnosis
An analytical model of cracked composite beams vibrating in coupled bending-torsion is developed. The beam is made of fiber-reinforced composite with fiber angles in each ply aligned in the same direction. The crack is assumed open. The local flexibility concept is implemented to model the open …
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Advanced functional and sequential statistical time series methods for damage diagnosis in mechanical structures
… witnessed major developments in vibration based damage detection and identification, also collectively referred to as damage diagnosis. Moreover, the past 10 years have seen a rapid increase in the amount of research related to Structural Health Monitoring (SHM) as quantified by the significant …
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Spectral diffusion map approach for structural health monitoring of wind turbine blades using distributed sensors
… SHM and also provides awareness of structural damage. In this work, we develop data-driven method for the diagnosis of damage in mechanical structures using an array of distributed sensors. The proposed approach relies on comparing intrinsic geometry of data sets corresponding to the undamage …
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Non-stationary time-dependent ARMA random vibration modeling, analysis & SHM with wind turbine applications
… under uncertainty, and its application to the diagnosis of structural damage, referred to as vibration-based Structural Health Monitoring (SHM). This is of relevance to several classes of modern structures, including bridges with moving vehicles, structures with changing geometry, cranes, …
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Online Joint Identification of Structural Dynamic Response Anomalies and Structural Damage Using Limited Data
… and operational conditions; and accurate damage diagnosis is often impeded by the scarcity of labeled damage data, which limits model generalizability and diagnostic accuracy. To address these challenges, this thesis proposes a limited-data-driven framework for the online joint …
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Application of vibration-based damage detection techniques to civil infrastructure : incorporating uncertainty quantification
… to identify research needs in vibration based damage detection techniques and the quantification of the uncertainty in these techniques. It was discovered that the literature lacked examples of the explicit propagation of measurement uncertainty through damage detection algorithms. …
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Cognitive and Perceptual-Motor Indicators of Lateralized vs. Diffuse Brain Damage in Adults.
… assessment are to detect the presence of brain damage, localize which areas of the brain may be dysfunctional and describe subsequent functional impairments. The sensitivity of neuropsychological instruments in carrying out these functions is a question of some debate. The purpose of this study …
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Finite Element Analysis of Defects in Cord-Rubber Composites and Hyperelastic Materials
… objective of this study is to investigate the damage development in hyperelastic materials. Two Finite Element models are adopted to study this phenomenon: multiscale modeling of the cord-rubber composites in tires and modeling of intelligent tires for evaluating the feasibility of the proposed …
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The utility of the McCarron-Dial System in determining location of brain lesion.
… assessment are to detect the presence of brain damage, localize which areas of the brain may be dysfunctional, and describe subsequent functional impairments. The sensitivity of neuropsychological instruments in carrying out these functions has long been a question of debate. The purpose of the …