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Analysis Of Jet Characteristics And Structural Optimization Of A Liquamatic Fire Water Monitor With Self-Swinging Mechanism, Guoliang Hu, Ming Long, Juxing Liang, Weihua Li
Analysis Of Jet Characteristics And Structural Optimization Of A Liquamatic Fire Water Monitor With Self-Swinging Mechanism, Guoliang Hu, Ming Long, Juxing Liang, Weihua Li
Faculty of Engineering - Papers (Archive)
This paper presents analysis and optimization of a liquamatic fire water monitor with a novel self-swinging mechanism. The design of the self-swinging mechanism has adopted a four-bar linkage driven by an impeller. The Fluent software was used to simulate the internal flow performance of the fire water monitor. In particular, the effects of the cross-sectional shape, diameters of the monitor body, inlet water pressure, and drive set of the self-swinging mechanism on the jet characteristics were analyzed. These analyses have led to optimal structural parameters of the flow channel. A prototype of the fire ware monitor was manufactured, and the …
Kinematic Analysis Of Electroactive Polymer Actuators As Soft And Smart Structures With More Dof Than Inputs, Rahim Mutlu, Gursel Alici, Weihua Li
Kinematic Analysis Of Electroactive Polymer Actuators As Soft And Smart Structures With More Dof Than Inputs, Rahim Mutlu, Gursel Alici, Weihua Li
Faculty of Engineering - Papers (Archive)
Electroactive polymer (EAP) actuators have been attracting the attention of researchers due to their muscle-like behaviour and unusual properties. Several modelling methods have been proposed to understand their mechanical, chemical, electrical behaviours or ‘electro-chemo-mechanical’ behaviour. However, estimating the whole shape or configuration of the EAP actuators has always been challenging due to their highly non-linear bending behaviour. This paper reports on an effective method to estimate the whole shape deflection of the EAP actuators by employing a so-called backbone approach. Tri-layer configured polypyrrole (PPy) based EAP actuators were used as a soft and smart structure with more degrees of freedom …
Non-Linear Analysis Of Soft Ground Consolidation At The Ballina By-Pass, Xueyu Geng, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Richard Kelly
Non-Linear Analysis Of Soft Ground Consolidation At The Ballina By-Pass, Xueyu Geng, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Richard Kelly
Faculty of Engineering - Papers (Archive)
This study presents a numerical assessment of consolidation under vacuum preloading with a system of vertical drains and membrane, considering the non-linear properties of the soil This membrane system, already widely used in Australia, is where an airtight membrane is placed over the drainage layer to allow a vacuum to be distributed within the sand platform, along the surface of the soil, and down the vertical drains. To date, there have only been a few fundamental investigations and field studies that have tried to assess the way in which the vacuum can propagate in soft clay, both laterally and vertically. …
Numerical Analysis Of Bearing Reinforcement Earth (Bre) Wall, Cherdsak Suksiripattanapong, Avirut Chinkulkijniwat, Suksun Horpibulsuk, Cholachat Rujikiatkamjorn, Theerasak Tanhsutthinon
Numerical Analysis Of Bearing Reinforcement Earth (Bre) Wall, Cherdsak Suksiripattanapong, Avirut Chinkulkijniwat, Suksun Horpibulsuk, Cholachat Rujikiatkamjorn, Theerasak Tanhsutthinon
Faculty of Engineering - Papers (Archive)
This paper presents a numerical simulation of the bearing reinforcement earth wall by PLAXIS 2D. The bearing reinforcement was regarded as a cost-effective earth reinforcement. The model parameters for the simulation were obtained from the conventional laboratory tests and back analyses from the laboratory pullout tests of the bearing reinforcement. The simplified method for modeling the bearing reinforcement, which converts the contribution of friction and bearing resistance to the equivalent friction resistance, is introduced. This method is considered to be acceptable and practical in working state with sufficient factor of safety and small pullout displacement. The bearing reinforcement is modeled …
A Change Analysis Tool For Service-Based Business Processes, Yi Wang, Jian Yang, Weiliang Zhao
A Change Analysis Tool For Service-Based Business Processes, Yi Wang, Jian Yang, Weiliang Zhao
Faculty of Engineering - Papers (Archive)
Change management is critical and challenging in the context of service-oriented computing paradigm when multiple services are supported by a single business process [1]. The complex dependencies between services and business processes have not been carefully investigated in the existing work. In particular, it is still lacking of an effective tool to support change impact analysis for coupled services and business processes. In this demo, we present a tool: Service Change Analyzer (SCA) for enabling impact analysis when a change happens. The SCA is built up based on our previous work for change analysis, in which a service-oriented business process …
Analysis Of Bloated Droplet Theory Using Steelmaking Process Models, N Dogan, G A. Brooks, M A. Rhamdhani
Analysis Of Bloated Droplet Theory Using Steelmaking Process Models, N Dogan, G A. Brooks, M A. Rhamdhani
Faculty of Engineering - Papers (Archive)
There is significant evidence that droplets generated in steelmaking "bloat" due to the inability of gas generated from the decarburisation reaction to escape from the surface of liquid metal droplets. A model to describe this behavior was developed by Brooks, Subagyo, Coley and Pan based on their own experimental work and calculations and previous studies by Fruehan and co-workers. This approach has been successfully incorporated into an overall process model of oxygen steelmaking. A unique feature of this model is an evaluation of the decarburization kinetics of individual metal droplets in the emulsion and comparing this to the overall kinetics …
Analysis Of Microstructure Effects On Edge Crack Of Thin Strip During Cold Rolling, Haibo Xie, Zhengyi Jiang, W Y Daniel Yuen
Analysis Of Microstructure Effects On Edge Crack Of Thin Strip During Cold Rolling, Haibo Xie, Zhengyi Jiang, W Y Daniel Yuen
Faculty of Engineering - Papers (Archive)
Edge cracks in cold rolling of the thin strip affect the strip quality and productivity significantly. In this study, an experimental and mechanical investigation on microstructures has been carried out to study the edge crack formation during cold rolling of the thin strip. The effects of the feed material microstructures on the edge crack evolution were studied employing optical microscopy and scanning electron microscopy (SEM). Experimental observation indicates that fine grain occurs in hot-rolled microstructure and coarse grain is produced in ferritic rolled microstructure. Different grain sizes affect significantly the formation mechanics of the microcrack, crack initiation, and orientation of …
Qos Analysis And Service Selection For Composite Services, Huiyuan Zheng, Jian Yang, Weiliang Zhao
Qos Analysis And Service Selection For Composite Services, Huiyuan Zheng, Jian Yang, Weiliang Zhao
Faculty of Engineering - Papers (Archive)
A composite service can be constructed with the arbitrary combination of sequential, parallel, loop, and conditional structures. In this paper, we propose a general solution to calculate the QoS for composite services with complex structures. We also show QoS-based service selection can be conducted based on the proposed QoS calculation method. An application example is given to show the effectiveness of the method.
General Probability Distribution-Based Qos Analysis For Web Service Composition, Huiyuan Zheng, Jian Yang, Weiliang Zhao
General Probability Distribution-Based Qos Analysis For Web Service Composition, Huiyuan Zheng, Jian Yang, Weiliang Zhao
Faculty of Engineering - Papers (Archive)
In this paper, we propose a comprehensive solution for QoS aggregation in service composition. Different from existing work on QoS modeling which uses single values, discrete values with frequencies, or well known statistical distributions, the proposed method can work on QoS represented by general probability distributions. A set of formulas are developed to calculate the QoS probability distribution for the composite service based on the four identified patterns. Experimental results are provided to demonstrate the effectiveness of the proposed method.
Strategy Of Water Pollution Prevention In Taihu Lake And Its Effects Analysis, Shuqing Yang, P.W. Liu
Strategy Of Water Pollution Prevention In Taihu Lake And Its Effects Analysis, Shuqing Yang, P.W. Liu
Faculty of Engineering - Papers (Archive)
Taihu Lake, the third largest freshwater lake in China, is located in the Chanjiang Delta of the Yangtze River. Its waters are used by agriculture, industry and as major drinking water for several cities including Shanghai and Wuxi. The lake also is important for tourism, aquaculture and flood control. Taihu Lake and its surrounding areas are facing three major water-related threats: deteriorating water quality with inflow and runoff from its watershed; flooding during the rainy seasons; and water shortages during drier months. Noxious algae blooms are occurring with increasing frequency and water quality continues to decline. Remedial actions implemented to …
Change Impact Analysis For Service Based Business Processes, Yi Wang, Jian Yang, Weiliang Zhao
Change Impact Analysis For Service Based Business Processes, Yi Wang, Jian Yang, Weiliang Zhao
Faculty of Engineering - Papers (Archive)
Change management is critical and challenging in the development and maintenance of service-based applications and information systems due to the distributed and dynamic nature of services. This paper proposes an approach for facilitating the change impact analysis in a service oriented environment. This research focuses on a typical scenario that multiple services are supported by a single business process. The change impact is analyzed based on the study of the dependency between services and business processes. Types of changes and change impact patterns are identified on the foundation of a service oriented business process model. These change types and the …
A Boundary Element Analysis On The Influence Of Krc And E/D On The Performance Of Cyclically Loaded Single Pile In Clay, Sudip Basack
A Boundary Element Analysis On The Influence Of Krc And E/D On The Performance Of Cyclically Loaded Single Pile In Clay, Sudip Basack
Faculty of Engineering - Papers (Archive)
The environment prevalent in oceans necessitates the piles supporting offshore structures to be designed against lateral cyclic loading initiated by wave action. Such quasi-static load reversal induces deterioration in the strength and stiffness of the soil-pile system, introducing progressive reduction in the bearing capacity associated with increased settlement of the pile foundation. To understand the effect of lateral cyclic load on axial response of single piles in soft clay, a numerical model was previously developed and validated by the author. Using the methodology, further analysis has been carried out to investigate how the variation in relative pilesoil stiffness and eccentricity …
Analysis Of Droplet Generation In Oxygen Steelmaking, Neslihan Dogan, Geoffrey Brooks, Akbar Rhamdhani
Analysis Of Droplet Generation In Oxygen Steelmaking, Neslihan Dogan, Geoffrey Brooks, Akbar Rhamdhani
Faculty of Engineering - Papers (Archive)
Knowledge of droplet generation during oxygen blowing, which can be characterized by a blowing number (NB), is crucial for better understanding of the fundamentals of the kinetics of oxygen steelmaking. A mathematical model has been developed considering the influence of surface tension on the blowing number (NB) using plant data from the study of Holappa and Jalkanen. The model predicts the droplet formation as a function of carbon, sulphur and oxygen contents in the metal, the temperature profile of the metal bath and lance height. This study includes a sensitivity analysis to investigate the …
Development And Performance Analysis Of A Saturated Core High Temperature Superconducting Fault Current Limiter, Jeffrey W. Moscrop, Scott Hopkins
Development And Performance Analysis Of A Saturated Core High Temperature Superconducting Fault Current Limiter, Jeffrey W. Moscrop, Scott Hopkins
Faculty of Engineering - Papers (Archive)
Recent international activity in the field of high voltage Fault Current Limiters (FCLs) has intensified since the North American blackout of 2003. A number of national and international peak body groups in the USA, Europe and Japan have been established to assess the need for FCLs and the issues associated with their design, specification, operation, protection and integration into the electricity grids. This paper details the development of a prototype 3-phase saturated core High Temperature Superconducting (HTS) FCL in Australia. Through experimental analysis, the performance of this device is characterised in terms of DC saturation, steady state performance, and fault …
Analysis Of Fume Formation Rate And Fume Particle Composition For Gas Metal Arc Welding (Gmaw) Of Plain Carbon Steel Using Different Shielding Gas Compositions, Kristin R. Carpenter, Brian J. Monaghan, John Norrish
Analysis Of Fume Formation Rate And Fume Particle Composition For Gas Metal Arc Welding (Gmaw) Of Plain Carbon Steel Using Different Shielding Gas Compositions, Kristin R. Carpenter, Brian J. Monaghan, John Norrish
Faculty of Engineering - Papers (Archive)
The present paper compares thirteen shielding gases and their impact on FFR and fume particle while welding in the spray transfer regime. There was no obvious influence from the shielding gas on particle composition and fume particles were identified as (Fe,Mn)3O4. There was a slight peak shift that indicated that small levels of Mn, as detected by TEM-EDS, substituted for Fe in the Fe3O4 phase. Shielding gas composition is an important parameter for successful gas metal arc welding (GMAW) and has been shown to affect the fume formation rate (FFR). In Ar-based mixtures, increasing CO2 had a greater impact than …
Cyclic Deformation Of Advanced High-Strength Steels: Mechanical Behavior And Microstructural Analysis, Timothy B. Hilditch, Ilana B. Timokhina, Leigh T. Robertson, E V. Pereloma, Peter D. Hodgson
Cyclic Deformation Of Advanced High-Strength Steels: Mechanical Behavior And Microstructural Analysis, Timothy B. Hilditch, Ilana B. Timokhina, Leigh T. Robertson, E V. Pereloma, Peter D. Hodgson
Faculty of Engineering - Papers (Archive)
The fatigue properties of multiphase steels are an important consideration in the automotive industry. The different microstructural phases present in these steels can influence the strain life and cyclic stabilized strength of the material due to the way in which these phases accommodate the applied cyclic strain. Fully reversed strain-controlled low-cycle fatigue tests have been used to determine the mechanical fatigue performance of a dual-phase (DP) 590 and transformation-induced plasticity (TRIP) 780 steel, with transmission electron microscopy (TEM) used to examine the deformed microstructures. It is shown that the higher strain life and cyclic stabilized strength of the TRIP steel …
Analysis Of Particle Motion In A Micro-Fluidic Dielectrophoretic Device, Weihua Li, X Z. Zhang
Analysis Of Particle Motion In A Micro-Fluidic Dielectrophoretic Device, Weihua Li, X Z. Zhang
Faculty of Engineering - Papers (Archive)
Interdigitated microelectrodes have found wide applications in manipulating and/or separating biological particles due to their simple structure and easy implementation. Particle behaviors in such interdigitated microelectrode devices are affected by a number of factors, including particle size, electrical potential, chamber geometry and dielectric properties. This paper presents systematical simulation study of particle behaviors in these devices by considering all these influencing factors. A case study is presented to separate different particles using both positive and negative DEP.
Specific Heat And Magnetic Relaxation Analysis Of Mgb2 Bulk Samples With And Without Additives, C. Senatore, P. Lezza, R. Lortz, Olga V. Shcherbakova, Wai Kong Yeoh, S. X. Dou, R. Flukiger
Specific Heat And Magnetic Relaxation Analysis Of Mgb2 Bulk Samples With And Without Additives, C. Senatore, P. Lezza, R. Lortz, Olga V. Shcherbakova, Wai Kong Yeoh, S. X. Dou, R. Flukiger
Faculty of Engineering - Papers (Archive)
The effects of SiC and Carbon doping on the superconducting properties of MgB2 polycrystalline samples have been analysed by means of specific heat and magnetic relaxation measurements. It is known that the addition of nanometric powders of SiC and C leads to the enhancement of Birr and Jc. However, the underlying physical mechanism is not completely understood. Magnetic relaxation measurements did not show detectable effects of both the additions on the pinning properties of MgB2. It follows that doping acts mainly introducing disorder into the superconductor and thus raising Bc2. In the case of MgB1.9C0.1, specific heat measurements show that …
Design And Analysis Of General And Travelling Dielectrophoresis, T. Kinkeldei, W.H Li
Design And Analysis Of General And Travelling Dielectrophoresis, T. Kinkeldei, W.H Li
Faculty of Engineering - Papers (Archive)
This paper presents the simulation of general and travelling dielectrophoretic forces, as well as the movement of the particles in a sandwich structure micro-device. The electrode geometry of the micro device used for simulation is an interdigitated bar electrode. The simulation method used to solve the equations is based on the least square finite difference method (LSFD). The simulation first calculates all forces acting at any place in the chamber, with these forces the trajectory of a particle can now be proposed. All of the particles parameters like radius, voltage, initial height, etc can easily be changed and the simulation …
Assessment Of Spatial Analysis Techniques For Estimating Impervious Cover, Steven Roso, Michael J. Boyd, Laurie A. Chisholm
Assessment Of Spatial Analysis Techniques For Estimating Impervious Cover, Steven Roso, Michael J. Boyd, Laurie A. Chisholm
Faculty of Engineering - Papers (Archive)
Impervious cover proportion is recognised as an important parameter in hydrologic modelling. Recent advances in the spatial sciences provide new capabilities for estimation of this value. This paper describes an assessment of seven estimation techniques, including human and computer based methods requiring a range of different input data and skill levels. In order to quantify the value of any gain in accuracy, the results from each method were applied to a real catchment using event based (WBNM) and continuous simulation (MUSIC) hydrologic models. The results showed that use of high resolution satellite imagery enabled the most accurate measurements of impervious …
General Methodology For Analysis And Modeling Of Trust Relationships In Distributed Computing, Weiliang Zhao, Vijay Varadharajan, George Bryan
General Methodology For Analysis And Modeling Of Trust Relationships In Distributed Computing, Weiliang Zhao, Vijay Varadharajan, George Bryan
Faculty of Engineering - Papers (Archive)
In this paper, we discuss a general methodology for analysis and modeling of trust relationships in distributed computing. We discuss the classification of trust relationships, categorize trust relationships into two layers and provide a hierarchy of trust relationships based on a formal definition of trust relationship. We provide guidelines for the analysis and modeling of trust relationships. We review operations on trust relationships and relative types of trust relationships in our previous work. We provide a set of definitions for the properties of direction and symmetry of trust relationships. In order to analyze and model the scope and diversity of …
Discrete Cosine Transform Based Shift Estimation For Fringe Pattern Profilometry Using Generalized Analysis Model, Jose F. Chicharo, Jiangtao Xi, Yingsong Hu, Zongkai Yang, Enbang Li
Discrete Cosine Transform Based Shift Estimation For Fringe Pattern Profilometry Using Generalized Analysis Model, Jose F. Chicharo, Jiangtao Xi, Yingsong Hu, Zongkai Yang, Enbang Li
Faculty of Engineering - Papers (Archive)
This paper presents a new analysis algorithm to carry out profile measure- ment with low computational complexity and less noise-sensitivity. Firstly, a discrete cosine transform (DCT) based representation method is introduced to express the height distribution of the three-dimensional surface. Then, a novel shift estimation algorithm, called DCT based shift estimation (DCT-SE) is presented to reconstruct three-dimensional object surfaces by using the proposed expression and the generalized analysis model. The advantage of DCT-SE is that without loss of measurement precise it provides lower computational complexity to implement three-dimensional reconstruction from distorted fringe patterns and at the same time survives from …
Analysis Of Oxidation And Surface Characteristics In Hot Strip Rolling, Zhengyi Jiang, Weihua Sun, Jianning Tang, Dongbin Wei, A K. Tieu
Analysis Of Oxidation And Surface Characteristics In Hot Strip Rolling, Zhengyi Jiang, Weihua Sun, Jianning Tang, Dongbin Wei, A K. Tieu
Faculty of Engineering - Papers (Archive)
Deformation characteristics of the oxide scale in hot strip mill have not been quantified before and the principle of the effect of oxide scale deformation in the roll bite on strip surface roughness has not yet been revealed. In this paper, analysis of the thin secondary oxide scale formed in hot metal rolling and its surface roughness micro deformation is carried out by experiments and finite element analysis. Simulation results are compared with the measured values, which show that they are in close agreement. Surface roughness transfer during hot metal rolling is also discussed.
3d Finite Element Analysis Of Surface Roughness And Friction In Hot Strip Rolling, Zhengyi Jiang, A. K. Tieu
3d Finite Element Analysis Of Surface Roughness And Friction In Hot Strip Rolling, Zhengyi Jiang, A. K. Tieu
Faculty of Engineering - Papers (Archive)
Surface roughness of oxide scale and strip in hot strip rolling has a significant influence on the friction and lubrication conditions. In this paper, the authors present the measured surface roughness of oxide scale and strip by Atomic Force Microscope (AFM) and Surface Profilometer respectively for hot rolled strip on a Hille 100 experimental rolling mill. Based on the friction coefficient determined through a sensor roll on the rolling mill, a 3D rigid visco-plastic finite element simulation was carried out, and the relationship between the surface roughness and friction coefficient was investigated. Results show that the lubrication in hot strip …
Analysis And Modelling Of Trust In Distributed Information Systems, Weiliang Zhao, Vijay Varadharajan, George Bryan
Analysis And Modelling Of Trust In Distributed Information Systems, Weiliang Zhao, Vijay Varadharajan, George Bryan
Faculty of Engineering - Papers (Archive)
In this paper, we consider the analysis and modelling of trust in distributed information systems.We review the relations of trust relationships in our previous work.We discuss trust layers and hierarchy based on formal definition of trust relationship.We provide a set of definitions to describe the properties of trust direction and trust symmetry under our taxonomy framework.In order to analyze and model the scope and diversity of trust relationship, we define trust scope label under our taxonomy framework.We provide some example scenarios to illustrate the proposed definitions about properties of trust relationship. The proposed definitions are new elements of the taxonomy …
Work-Per-Cycle Analysis For Electromechanical Actuators, Geoffrey M. Spinks, Van T. Truong
Work-Per-Cycle Analysis For Electromechanical Actuators, Geoffrey M. Spinks, Van T. Truong
Faculty of Engineering - Papers (Archive)
Work-per-cycle calculations have been demonstrated for two modes of actuation behaviour: (1) working against a dead weight (isotonic actuation) and (2) working against a restoring spring. Importantly, the influence of the electrical stimulus on the elastic modulus of the actuator material has been included in the analysis. The change in elastic modulus is shown to significantly influence the actuator strain and work-per-cycle. The maximum work-per-cycle for each case has been calculated. Comparison of different materials has been made on the basis of our theoretical prediction and other published models. Work-per-cycle is shown to be significantly affected by the mode of …
Analysis And Design Of Double-Sided High-Rise Steel Pallet Rack Frames, Lip H. Teh, Gregory J. Hancock, Murray J. Clarke
Analysis And Design Of Double-Sided High-Rise Steel Pallet Rack Frames, Lip H. Teh, Gregory J. Hancock, Murray J. Clarke
Faculty of Engineering - Papers (Archive)
In routine design of steel storage rack frames, it is far more common to perform two dimensional (2D) rather than three dimensional (3D) linear buckling analyses. In this paper, it is demonstrated that the global buckling behavior of high-rise steel storage rack frames may not be revealed by 2D buckling analyses as 3D interaction modes are involved. It is shown that the monosymmetric upright columns of a high-rise rack frame fail in a flexural–torsional mode due to the shear-center eccentricity of the sections, and that the 3D frame buckling analysis is more reliable in determining the critical members of a …