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 20 for “"1204 Engineering Design"”.
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Pressure signature in adverse-pressure-gradient wall bounded turbulent flows
… or curved wall are encountered frequently in engineering applications in both internal and external flows. Common examples of such internal flows can be seen in diffuser flows in turbomachinery applications, in the flow passages of vehicles and appliances, and in the flow passages inside a …
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Extended evolutionary structural optimization method for multi-storey buildings
… of a methodology to help the structural designers to choose the optimal topology among many topologies that are generated during the evolutionary optimization process. Other problems of the ESO method such as the termination condition, sharp change in structural mean compliance or …
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Granular sloshing absorbers for vibration control
… developed and validated, and can be used as a design tool for a large scale absorber. In this thesis a new and innovative passive damper design is proved on a small prototype and numerical tools required to implement a real device are developed. These tools can be used to create safer …
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Axial load capacity of circular steel tube columns filled with high strength concrete
… effective strength confined concrete. Existing design models and codes are predominantly derived from the characteristics of normal strength concrete and therefore may be inappropriate concrete filled steel columns utilising High Strength Concrete (HSC). An extensive experimental program was …
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Development and testing of a variable valve timing system (VVT) for a twincam automotive engine
Variable valve timing (VVT) is an innovative design that enhances automotive engine performance and is important in addressing fuel consumption and emission output concerns. The purpose of the research reported here was to examine the concept of a VVT system because it had the promise of …
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Numerical model for analysis and control of the quality of bulk-stored grain using cold air
Food grains that have been cooled can be stored for prolonged periods. This is because the rate population increase of insect pests can be slowed, seed viability is maintained, dry matter loss is reduced and the persistence of chemical pesticides can be improved. This thesis reports the development …
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Modelling the microclimate in a conical bottomed circular grain silo
… An outcome of the research has been improved the designs of commercially available grain silos.
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Analysis of vibration reduction via local structural modification
… and more important role in solving practical engineering problems. This thesis develops methods for vibration reduction via local structural modification. In this thesis, the reduction of unwanted vibration in a structural system is principally analysed in two ways, (i) relocation of …
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Fuzzy technology application for mobile positioning in cellular communication
In engineering systems there is generally two classes of knowledge: objective knowledge, which can be quantified using the laws of traditional mathematics, and subjective or intelligent knowledge, that cannot be modeled mathematically but can be expressed in linguistical terms. Fuzzy Logic (FL) is …
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Finite element simulation of Durelli's photoelastic stress minimization method for shape optimization
… material in lowly stressed regions of the design domain is removed so as to make the sections of the discontinuity boundary become isochromatics of the same Tresca stress. The process of material removal was simulated by iterative deleting of elements lying on the stress raiser boundary, …
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Evolutionary methods for topology optimisation of continuum structures: static and dynamic problems
This thesis studies the topology optimisation of continuum structures. Two methods have been investigated, namely. Evolutionary Structural Optimisation (ESO) and Bidirectional ESO (BESO). The basic concept of ESO is that by systematically removing inefficient materials from the structure, the …
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Damage detection in structures using measured frequency response function data
Modern engineering structures such as offshore oil platforms, transmission towers, bridges and aircraft frames are regularly monitored and maintained in order to avert catastrophic failure. Despite our best efforts, sporadic failures, which may have disastrous consequences in terms of human life …
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Modelling of fire spread and the growth of fire in buildings using computational fluid dynamics
The motivation for undertaking this research is to contribute to the development of a model of fire spread over a surface, and to integrate this model with a computational fluid dynamics (CFD) model that is capable of making predictions of the environment associated with full-scale fires in …
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The analysis and simulation of the spectral and statistical properties of road roughness for package performance testing
… reliability and accuracy. Computer software is designed to automatically detect and extract transient events from the majority of road data, which contains short segments of constant RMS level. Transients are analysed separately from the constant RMS sections. Nine universal classification …
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Optimal applications of high-strength concrete in structural walls of tall buildings
This study examines the application of high-strength concrete (HSC) in structural walls of tall buildings. Emphasis is put on the cost-benefits corresponding to the use of higher concrete strengths. The parameters included in the cost analysis are: the material cost of concrete and reinforcing …
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Improving the productivity of marine container terminals
The research presented in this thesis is concerned with several facets of the management of container terminals. One facet, of the research was to test the hypothesis that it is difficult to compare the productivities of container terminals. This is because the measures used to calculate …
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Low cost integrated substation protection and control system
With the recent developments in the digital equipment associated with the power system such as digital relays and transducers the development of integrated substation protection and control systems were possible. In this thesis the use of the currently available very sophisticated and reliable, yet …
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Fire development in passenger trains
… in passenger trains and evaluate existing design fire estimation methods applied to passenger trains.
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The investigation of fire hazards in buildings using stochastic modelling
This research investigates the spread of fire and smoke in buildings as well as occupant egress. There are existing deterministic models for these. While deterministic models provide averages of a process, stochastic models give the broad spectrum of all possible scenarios of the process giving the …
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Bi-directional evolutionary method for stiffness and displacement optimisation
… criteria algorithm for problems of discrete design variables. These aspects include the optimality criteria, sensitivity analysis, displacement extrapolation and evolutionary procedure. The bi-directional evolutionary procedure is incorporated with the finite element analysis to realise an …