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 153 for “"Damage detection"”.
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Structural damage detection using ambient vibrations
… 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 loads on a tall building. This …
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Bridge damage detection and BIM mapping
Bridges are a vitally important part of modern infrastructure. Their condition needs to be monitored on a continuous basis in order to ensure their safety and functionality. Teams of engineers visually inspect more than half a million bridges per year in the US and the EU. There is clear evidence …
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Mobile hyperspectral imaging for structural damage detection
… due to their poor performance in object detection when structural cracks coexist with other complex scenes. A mobile hyperspectral imaging system is developed in this work, which captures hundreds of spectral reflectance values at a pixel in the visible and near-infrared (VNIR) portion of …
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Structural Damage Detection Utilizing Experimental Mode Shapes
<p>A method of locating structural damage is developed and tested to aid in the evaluation of structural health. This method will help minimize the cost of structural inspection and repair by informing engineers of where damage, due a seismic event, has occurred before the removal of finishes for …
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Structural damage detection using signal-based pattern recognition
Civil structures are susceptible to damages over their service lives due to aging, environmental loading, fatigue and excessive response. Such deterioration significantly affects the performance and safety of structure. Therefore, it is necessary to monitor the structural performance, detect and …
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Vibration Based Planetary Gear Analysis and Damage Detection
… tools (MSC:Adams) this gap of gear failure detection simulation can be closed. The objective is, making it possible to simulate all failure modes of a gear that can occur. Additionally the previous project on this topic were using gears of small laboratory conditions. An industry sector has …
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Damage Detection in Aluminum Cylinders Using Modal Analysis
Many studies have attempted to detect structural damage by examining differences in the frequency response functions of a structure before and after damage. In an experimental setting, this variation can not be attributed solely to the addition of damage. Other sources of variation include testing …
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Damage detection and location in large space trusses
The purpose of this study was to review the history of financing public school facilities in Virginia with primary emphasis on the period of the public schools, 1870 through 1987. An ancillary purpose of the study was to review alternative methods of financing public school capital facilities in …
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Fan blade damage detection using on-line vibration monitoring
Please read the abstract in the section 00front of this document
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Automated structural damage detection using one class machine learning
… using sensors can help identify and detect damage, potentially prolonging the life of structures and preventing disasters. Wireless sensor systems promise to make this technology more affordable and more widely applicable. Data driven structural health monitoring methodologies take raw …
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Towards Multiclass Damage Detection and Localization using Limited Vibration Measurements
Traditional vibration-based damage detection methods provide structural health information based on their measured data (i.e., acceleration and displacement response). Over the last few decades, various model-based and time-frequency methods have shown great promises for damage identification and …
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Damage detection in structures using measured frequency response function data
… systems which can identify and quantify damage as it occurs in a structure. The development of a number of techniques that contribute to providing means to detect structural damage is the goal of the work presented in this thesis.
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Damage Detection Using Destructive Testing of a Reinforced Concrete Slab
… SHE^tm program, which quantitatively measures damage location and severity for any set of time data.
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Damage detection and assessment of structural systems from measured response
A new damage detection algorithm is developed based on a system identification method. The algorithm can be used as a non-destructive diagnostic technique to aid in decisions of repair and rehabilitation of existing structures. The developed algorithm is able to detect and assess damage in a …
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Subsurface damage detection using a novel fiber optic sensing technique
The detection of subsurface damage is important in ensuring the safety and timely repair of structures. Existing methods for non-destructive evaluation of structural elements tend to be either expensive or unreliable for monitoring large scale systems. The novel fiber optic based technique …
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Finite element model updating and damage detection using artificial boundary conditions
… the ABCs in sensitivity-based model updating and damage detection in conjunction with baseline data provides improved error localization and results in a more accurate finite element model.
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Methods for real-time actuator-sensor-failure and structural damage detection
… and quantification aspects of structural damage detection using global damage detection methods. It includes two parts: (1) isolation and detection of failure of the actuator/sensor/structural elements in real-time using interaction matrix formulation and parity based method, and (2) …
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Fe Modeling In Support Of Vibration Based Damage Detection In Bridges
Vibration based damage detection in bridges is examined with the objective of defining a relationship between substructure stiffness degradation and frequency and mode shape modulation induced by damage. The relationship is explored through finite element modeling of primarily an experimental …
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Damage Detection and System Identification using a Wavelet Energy Based Approach
… of the SHM: parametric system identification and damage detection. The first proposed method seeks to identify the physical parameters of an analytical model. First, the connection coefficients for the scaling function were developed for deriving the responses of the velocity and displacement from …
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