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  • A framework to model reliability and failures in complex systems during the early engineering design process

    Creator:
    O'Halloran, Bryan M.
    Abstract:
    An open area of research in complex systems is to move reliability and failure assessments earlier in the engineering design process. When compared to later design, early decisions are cost effective and have a large impact on the system. Standard methods are limited by the availability of data and often...
    Resource Type:
    Dissertation
    Full Text:
    Mechanical Engineering presented on May 3, 2013. Title: A FRAMEWORK TO MODEL RELIABILITY AND FAILURES IN

  • Optimization and control of cable deployment systems

    Creator:
    Mtira, Mohamed
    Abstract:
    An optimization methodology, algorithms, and computer program for cable/lumped-body deployment system are developed for the design and installation of sonar packages in deep ocean ranges. In addition, a methodology and algorithms for the control of the system are proposed. A penalty function is developed in terms of the system parameters...
    Resource Type:
    Masters Thesis
    Full Text:
    Environment 17 3.2 Mathematical Model 17 3.2.1 State Variables 17 3.2.2 System Parameters 18 3.2.3

  • Ultimate and serviceability limit state reliability-based axial capacity of deep foundations

    Creator:
    Reddy, Seth C.
    Abstract:
    Deep foundations are necessary for the construction of many structures, such as bridges and buildings, located in areas unsuitable for shallow foundations. Owing to the inherent variability of soil and the complex changes that occur in the soil adjacent to deep foundations as they are installed, the ability to accurately...
    Resource Type:
    Dissertation
    Full Text:
    DISSERTATION OF Seth C. Reddy for the degree of Doctor of Philosophy in Civil Engineering presented on

  • An MCNP benchmark model of the large experimental ZPPR-19B sodium fast reactor

    Creator:
    Onufer, Mark
    Abstract:
    The International Handbook of Evaluated Reactor Physics Benchmark Experiments contains detailed descriptions of many different reactor facilities. A large portion of these experiments have not been fully modeled due to the unavailability of computational power at the time of the experiment’s execution. With the advent of renewed interest in Sodium...
    Resource Type:
    Masters Thesis
    Full Text:
    of Science in Nuclear Engineering presented on December 11, 2013. Title: An MCNP Benchmark Model

  • Evaluation of the Performance of Lateral Spread Displacement Empirical Models for Subduction Zone Earthquake Case Histories

    Creator:
    Bunn, Michael
    Abstract:
    Lateral spread is a pervasive type of liquefaction-induced ground failure that occurs on gentle slopes or near free-faces, such as river channels. Resulting horizontal displacements can reach up to several meters, and can be considerably damaging to foundations, bridges, roadways, pipelines, etc. In the 1990s, Bartlett and Youd (1992a, 1995)...
    Resource Type:
    Masters Thesis
    Full Text:
    lateral spread displacements. Since then, this model has become popular in engineering practice

  • Flexural steel anchorage performance at diagonal crack locations

    Creator:
    Triska, Mary Ann
    Abstract:
    Large numbers of reinforced concrete deck girder bridges that were constructed during the interstate system expansion of the 1950s have developed diagonal cracking in the stems. Compared to the present AASHTO-LRFD standards, the provisions of the 1950s allowed for higher shear stress in the concrete, thus reducing the amount of...
    Resource Type:
    Masters Thesis
    Full Text:
    THE THESIS OF Mary Ann Triska for the degree of Master of Science in Civil Engineering presented

  • From Functional Modeling to Optimization : Risk and Safety in the Design Process for Large-Scale Systems

    Creator:
    McIntire, Matthew G.
    Abstract:
    In order to more effectively design large, complex systems, risk must be accounted for throughout the design process. A systematic way to account for risk is by using system model simulation. During the conceptual design phase, functional models can be drawn to help the engineer design their system's functional architecture....
    Resource Type:
    Dissertation
    Full Text:
    the degree of Doctor of Philosophy in Mechanical Engineering presented on November 30, 2016. Title

  • Parametric uncertainties in reliability analysis of bridge structures

    Creator:
    Hamutcuoglu, Osman Murat
    Abstract:
    Probability-based reliability methods have placed an increased emphasis on realistic simulation of structural behavior in bridge engineering. Uncertainty is present in every aspect of structural analysis. Aleatory uncertainties in the loading and load-carrying capacities, and epistemic uncertainties in mathematical idealization of bridge systems are the major contributors to uncertain structural...
    Resource Type:
    Dissertation
    Full Text:
    representations of systems using mathematical solutions and numerical approximations. The model uncertainty

  • Detection of induction motor stator abnormalities using motor current signature analysis

    Creator:
    Bin Eid, Ghassan A.
    Abstract:
    Induction motors are considered to be the work horse in all types of today's industries. In all mechanical applications, using an induction motor is considered to be the preferable, if not the optimum selection. Their failures, on the other hand, cause an interruption equal to their volume of dependency in...
    Resource Type:
    Masters Thesis
    Full Text:
    of Master of Science in Electrical and Computer Engineering presented on December 6, 2004. Title

  • Practical modeling for load paths in a realistic, light-frame wood house

    Creator:
    Pfretzschner, Kathryn S.
    Abstract:
    The objective of this study was to develop and validate practical modeling methods for investigating load paths and system behavior in a realistic, light-frame wood structure. The modeling methods were validated against full-scale tests on subassemblies and an L-shaped house. The model of the L-shaped house was then modified and...
    Resource Type:
    Masters Thesis
    Full Text:
    Wood Science and Civil Engineering presented on September 5, 2012   Title: Practical Modeling for