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 83 for “"Dynamic Testing"”.
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Dynamic Testing of an Elevated Water Tank
… current environment through ambient vibration testing. </p>
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Dynamic testing of loss of field protection
The thesis begins with a discussion of loss of field relaying principles, which is followed by a discussion of real-time playback systems. Loss of excitation protection has been implemented in General Electric’s EX2000 Digital Exciter. Through the use of EMTP, several different system disturbances …
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Dynamic Testing and Modeling of a Superelevated Skewed Highway Bridge
… is needed to define the procedures for testing each bridge. The NDE techniques involve dynamic testing, and the protocol for this testing has yet to be finalized. To evaluate the dynamic testing guidelines, a 103 ft single-span, simply supported highway bridge was dynamically tested. The …
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Dynamic testing of polydimethylsiloxane for applications in micro-contact roll printing
… of the stamp on the sheet because the precise dynamic mechanical behavior of the polydimethylsiloxane stamp is unknown. The purpose of this thesis is to apply system identification techniques to characterize the dynamic behavior of samples of polydimethylsiloxane by constructing a test …
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Design, Manufacture, Dynamic Testing, and Finite Element Analysis of a Composite 6u Cubesat
… is focused on designing, manufacturing, and dynamic testing of a 6U CubeSat made of carbon fiber, fiberglass, and aluminum.</p> <p>The main objective of this study was obtaining a mass reduction of a 6U CubeSat structure, maintaining the stiffness and strength. Considering the thermal effects …
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Dynamic Testing of a Full-Scale Pile Cap with Dense Silty Sand Backfill
Full-scale dynamic lateral load tests were performed on a pile cap with a dense silty sand backfill condition. Two hydraulic load actuators connected a test pile cap with a reaction cap. The load actuators incrementally loaded the test cap up to 50 mm of displacement. After each load increment, the …
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Dynamic Testing of In-Situ Composite Floors and Evaluation of Vibration Serviceability Using the Finite Element Method
… three areas: best practices in high quality dynamic testing of in-situ floor systems, extensive dynamic testing of three bare (non-fit out) in-situ multi-bay steel composite floors to estimate their dynamic parameters/response and to identify trends in dynamic behavior, and development of a …
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A study of the effect of cracks on the resonant frequency and dynamic modulus of elasticity of insulating brick by the dynamic testing method
… standard fire brick will cause a lowering of the dynamic modulus of elasticity calculated.
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Thermal performance testing of heat exchangers with reference to future automation
… reducing the time spent in thermal performance testing heat exchangers. Conventional testing requires establishing steady state conditions which is time consuming. The research considered two approaches - use of a non-steady state testing technique and closed-loop control of steady state …
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A Comparison and Evaluation of Different Dynamic Characterization Approaches for Bridges
… of this thesis was to compare different dynamic characterization approaches for full scale bridge structures to devise a rapid and reliable Structural Health Monitoring (SHM) program in the aftermath of a natural or manmade hazard. Present methods for structural condition evaluation of …
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Rapid Condition Assessment of Bridges By Falling Weight Deflectometer
… agencies already use these machines for pavement testing and this would provide a means of quantitatively evaluating bridges. This thesis will discuss the advantages and disadvantages of using a FWD and how it compares to the use of a modal impact hammer. </p> <p>The experimental characterization …
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Portable sensor to measure the mechanical compliance transfer function of a material
A device that can measure the dynamic compliance of a material has applications for research, health sciences and for use as a pedagogical tool. A device was created which stochastically perturbs a material while measuring the resulting forces and displacements. A software program then creates a …
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Characterization of Oscillatory Lift in MFC Airfoils
… the deflection of airfoil surfaces during dynamic testing conditions. This research serves to combine modal analysis, empirical modeling, and aerodynamic testing of MFC driven, oscillating lift to formulate a model of a dynamic, loaded morphing airfoil.
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Testing of a Magnetically Levitated Rocket Thrust Measurement System Demonstrator for NASA
… with a conventional load cell for static and dynamic testing, respectively. Both current based and flux based force equations were used to measure the reaction forces at the bearings. The static results using the current based equations including the current based fringing equations resulted …
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