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 222 for “"Dynamic behaviour"”.
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Dynamic behaviour of oil lubricated journal bearings
This thesis is concerned with the dynamic behaviour of oil lubricated journal bearings and particularly with the small vibrations about the equilibrium position known as 'oil whirl'. The importance of shaft flexibility and oil film cavitation to this phenomena are investigated. Several authors have …
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Dynamic behaviour of curved cable-stayed bridges
… geometric shapes, which lead to a different dynamic ability. Therefore, in order to verify the dynamic performance of the structure, it is necessary to investigate the effects on dynamic behaviour of such particular geometric shape and structure by considering both serviceability and ultimate …
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Individual and group dynamic behaviour patterns in bound spaces
The behaviour analysis of individual and group dynamics in closed spaces is a subject of extensive research in both academia and industry. However, despite recent technological advancements the problem of implementing the existing methods for visual behaviour data analysis in production systems …
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The dynamic behaviour of check valves in pipeline systems
… method is developed to describe the dynamic behaviour of check valves in pipeline systems. The method is based on parameterized valve models and dimensionless valve characteristics, which may be obtained from experiments. The check valve is considered as a black box with certain input …
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Mathematical simulation of dynamic behaviour of secondary settling tanks
… a computer model for the simulation of dynamic behaviour of full scale secondary settling tanks. The model was initially developed for and tested on laboratory scale data. It was then calibrated with full scale data and used to verify the flux theory by comparing the simulated …
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Effect of composite action on the dynamic behaviour of space structures
… demonstrated large improvementsin their static behaviour caused by the introduction of composite action. Theseimprovements included an increase in ductility to avoid progressive collapse, a largeincrease in load-carrying capacity and a considerable reduction in materialconsumption.In this work, …
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Study of dynamic behaviour of multi-layered structures subjected to blast loading
The objective of this research work is to assess the response of multi-layered plates in comparison to single plates to gain physical understanding of different phenomena taking place at micro level during localized blast loading. Since layered plates have been shown to give improved ballistic …
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A study of the dynamic behaviour of a pulsed column solvent extraction plant
A study has been made of the dynamic behaviour of a nuclear fuel reprocessing plant utilising pulsed solvent extraction columns. A flowsheet is presented and the choice of an extraction device is discussed. The plant is described by a series of modules each module representing an item of equipment. …
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A numerical investigation of the dynamic behaviour of continuous, multi-span railway bridges
The dynamic behaviour of railway bridges has been investigated for over a century [Ichikawa et al., 2000]. With the introduction of high speed trains in recent history, a host of complex problems regarding resonance have been observed and studied. These studies, which include Bjorklund [2004]; …
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Analysis of the dynamic behaviour of the hangingwall beam during a seismic event
… particularly concerned with the global, resonant behaviour of the hangingwall and local shear or crushing failure of the rock at the shear fractures is not considered. A finite element program is developed to compute the hangingwall response during seismicity. The response is normalised, thus …
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A Quadratic Non-Linear Elasticity Formulation for the Dynamic Behaviour of Fluid-Loaded Structures
… achieved by means of a fixed-point solver with dynamic relaxation. The fluid-structure interaction approaches are validated and compared on benchmark problems of increasing complexity and strength of coupling between the fluid and solid domains. Fluid-structure interaction systems may become …
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The finite element of modelling of the dynamic behaviour of a transmission line conductor
… element method, to the problem of modelling the dynamic behaviour of conductors. In modelling the conductor, the assumption that it may be treated as a solid continuum is made. Due to the construction of a conductor, however, the bending stiffness and internal damping of the conductor are …
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The Modelling and Simulation of the Dynamic Behaviour of a Lift Car-Rope Suspension System
… of lift systems requires performing a thorough dynamic analysis in order to predict the dynamic loads and to evaluate the response of the system during various operational modes. The dynamic response of the lift system may be caused by a number of sources of excitations such as the inertial load …
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Structural changes and dynamic behaviour of vanadium oxide-based catalysts for gas-phase selective oxidations
… under reaction conditions. For this reason, the dynamic phenomena occurring at the surface of a 7wt% V2O5 on TiO2 catalyst in the presence of steam is investigated by means of Raman spectroscopy. Moreover a correlation between the amount of the different vanadium species and catalytic …
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Dynamic Behaviour of Composite Structures Containing Viscoelastic Materials, with Applications to Solid Fuel Rocket Motors
The object of the research was to study the effect of forced harmonic vibration on solid fuel rocket motors. A rocket motor consists of the motor case (which contains the propellant) and the blast tube attached to the aft end. The propellant is a viscoelastic material, no reliable data on the …
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Influence of geometry on the dynamic behaviour of steel tubular towers for onshore wind turbines
… turbine design by South African engineers. The dynamic analysis of wind turbine structures, is of particular interest to Civil Engineers. Wind turbine towers are recently of the monopole or tubular type tower, predominantly constructed of either concrete or steel or a combination of both. Steel …
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The dynamic behaviour of rail vehicles operating at high speeds for manriding in British coal mines
The behaviour of trains used at high speeds for transporting men along mine railways is examined using a number of mathematical models. These models predict the responses of different rail vehicles to typical irregularities in the track, and are used to examine the guidance, the ride, and the …
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The influence of structural-acoustic coupling on the dynamic behaviour of a one-dimensional vibro-acoustic system
… the structural-acoustic coupling effects on the dynamic behaviour of a vibro-acoustic system under passive/active control. The simplest model of a vibro-acoustic system one can consider is a one-dimensional acoustic cavity driven by a single-degree-of-freedom (SDOF) structure. This simple model …
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