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.
Results
Showing 1 to 16 of 16 for “"acceleration response"”.
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Dynamic Testing of In-Situ Composite Floors and Evaluation of Vibration Serviceability Using the Finite Element Method
… floors to estimate their dynamic parameters/response and to identify trends in dynamic behavior, and development of a set of fundamental finite element (FE) modeling techniques to adequately represent the dynamic response of steel composite floors for the purpose of evaluating vibration …
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Cost-Savings of Implementing Site-Specific Ground Motion Response Analysis in Design of Mississippi Embayment Bridges
… and a site-specific ground motion response analysis (SSGMRA) were conducted for a bridge site in Monette, Arkansas. The SSGMRA indicated the design acceleration response spectrum determined using the American Association of State Highway and Transportation Officials (AASHTO) general …
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Vibration Measurement Based Damage Identification for Structural Health Monitoring
… this research is on the development of vibration response-based damage detection in civil engineering structures. Modal parameter-based and model identification-based approaches have been considered. In the modal parameter-based approach, the flexibility and curvature flexibility matrices of the …
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Statistical analysis of the vertical human walking forces and human structural interaction effects
… its inclusion. Current estimations of structural responses do not align with the physical measurements of structures. The resultant acceleration estimations from the guidance are often overestimated compared to the actual structural response. Therefore, many structures may have been overdesigned …
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Prediction of Floor Vibration Response Using the Finite Element Method
… fundamental frequency of vibration and the peak acceleration due to walking excitation as given in AISC Design Guide 11, Floor Vibrations Due to Human Activity (Murray, et al., 1997). For this research several test floors were constructed and tested, and this data was supplemented with test data …
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Development and Testing of a Hybrid Vehicle Energy Management Strategy
… validates that the hybrid powertrain meets acceleration response targets while delivering an enjoyable driving experience. Simulation testing shows that the energy management strategy improved fuel economy in most drive cycles with improvements of 8.8% for US06, 9.8% for HWFET, and 0.1% for …
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Three Degree-of-Freedom Simulator Motion Cueing Using Classical Washout Filters and Acceleration Feedback
… results. In efforts to greatly improve the acceleration response in the pitch axis, the concept of an acceleration feedback controller in conjunction with washout filters was investigated. In developing a mathematical model of the motion-base and its corresponding circuitry, corrections and …
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Dynamic analysis of concrete coupled wall structures : a parametric study
… pushover analysis was applied in Phase I, and acceleration response spectrum was employed in Phase II. The comparison of the results from both phases provided valuable insight on the structural behaviors of shear walls. The Phase I results showed that C-shaped coupled wall were more efficient …
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Drive Quality Improvement and Calibration of a Post-Transmission Parallel Hybrid Electric Vehicle
… in the smoothness of the vehicle longitudinal acceleration response. This research is focused on improving the drive quality of the vehicle developed for EcoCAR 3. Multiple algorithms are developed to address specific aspects of drive quality that can only be done with the powertrain developed. …
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Structural damage detection using signal-based pattern recognition
… 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 assess damages at the earliest possible stage in order to reduce the life-cycle …
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Modelling of crowd-induced vibrations in stadium terraces
… of the impulse, the dominant harmonic in the acceleration response and the effect on the fundamental frequency. Thus, for safe and economic design of lightweight and flexible structures, the proposed model may be used to simulate the effects of jumping at frequencies that are significantly …
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The design and application of polymeric materials in a novel light modulated accelerometer.
… system under three modulation schemes. The acceleration response of the device was seen to be linear over the testing range whilst the frequency response dropped off initially and levelled off at approximately 1 kHz.An experimental accelerometer was also assembled on the vibration table so …
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Finite Element Modeling for Prediction of Low Frequency Floor Vibrations Due to Walking
… is a logical choice for predicting vibration response to walking, but simplified designer-friendly procedures are not available. Three relatively simple, experimentally verified methods of predicting low frequency floor vibration due to walking are presented in this dissertation. The methods …
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Development of Electromagnetic Friction Dampers for Improving Seismic Performance of Civil Structures
… that is inherent in friction and increases the acceleration response of the structure under control unfavorably, in spite of the fact that the displacement is generally reduced because of the energy dissipation. This increase in acceleration can, for example, significantly affect the seismic …
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Evaluating soil pressures on a deep foundation element due to liquefaction-induced lateral spreading
… during earthquakes includes the inertial response of the foundation and superstructure system, and the kinematic forces induced by the lateral spreading ground. Both must be analyzed in practice to design a bridge foundation, or other foundation type, subject to seismic forces and …
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Effects of Bottom Chord Extensions on the Static and Dynamic Performance of Steel Joist Supported Floors
… 20 psf deflections. However, the FRF (Frequency Response Function) peaks of chirp, heel drop, sinusoidal excitations, accelerations from walking data, and the MEScope and Finite Element model effective mass results do not follow a common trend. It can be concluded that even though the footbridge …