A hybrid approach to predict the structure-borne noise transmission in ship structures using a waveguide method and Statistical Energy Analysis. The prediction of structure-borne noise transmission in large welded ship structures is required, in order to design maritime vessels with greater ship power and reduced weight, without increasing the noise levels. The aim of this project is to develop a hybrid approach for structural dynamic analyses using an analytical waveguide method and Statistical ....A hybrid approach to predict the structure-borne noise transmission in ship structures using a waveguide method and Statistical Energy Analysis. The prediction of structure-borne noise transmission in large welded ship structures is required, in order to design maritime vessels with greater ship power and reduced weight, without increasing the noise levels. The aim of this project is to develop a hybrid approach for structural dynamic analyses using an analytical waveguide method and Statistical Energy Analysis. The theoretical estimation and associated experimental measurement of the SEA parameters (modal density, coupling and internal loss factors) form the basis for the hybrid approach. The outcomes will result in improved predictive techniques for dynamic analyses of large complex resonant structures.Read moreRead less
Wave slam on high speed wave piercing catamaran ferries in large seas. Australia has taken a pioneering lead in the design of high speed multi-hull ferries and continues to extend their speed, range and payload performance. Design leadership and the technology which supports it are crucial to maintaining the existing large share of the international market for such vessels. Recently freight and military transport vessels have been exposed to much more severe wave conditions than passenger vessel ....Wave slam on high speed wave piercing catamaran ferries in large seas. Australia has taken a pioneering lead in the design of high speed multi-hull ferries and continues to extend their speed, range and payload performance. Design leadership and the technology which supports it are crucial to maintaining the existing large share of the international market for such vessels. Recently freight and military transport vessels have been exposed to much more severe wave conditions than passenger vessels and this has increased the need for improved prediction of structural loads due to waves. This project directly addresses that need by computation and model testing validation. The industry is a significant export earner and employer within Australia and so the project directly underpins those national benefits. Read moreRead less
Asymmetric and nonlinear unsteady loads on high speed ferries. Large high speed catamarans are expanding their domain of application from coastal passenger routes to ocean freight and military service. This is shifting operability criteria from motions and passenger discomfort to structural load limitations in severe wave environments. This project investigates large wave structural load prediction. Large waves lead to strongly non-linear responses, invalidating many methods of analysis. Predict ....Asymmetric and nonlinear unsteady loads on high speed ferries. Large high speed catamarans are expanding their domain of application from coastal passenger routes to ocean freight and military service. This is shifting operability criteria from motions and passenger discomfort to structural load limitations in severe wave environments. This project investigates large wave structural load prediction. Large waves lead to strongly non-linear responses, invalidating many methods of analysis. Prediction of loads on the transverse structure is also not possible with many prediction methods. This project will develop and validate by experiment fully time domain computational methods for the prediction of asymmetric structural loads due to large wavesRead moreRead less
Development of Advanced Fracture Mechanics Models and Novel Technical Tools for Integrity, Durability and Safety Assessment. The proposed project will lead to the new understanding of fracture phenomena and structural integrity. It will create a range of novel computer based technical tools for life and integrity assessment of structures in the presence of cracks and other defects, so as to meet the high safety standards across a wide range of industries. The project will result in technology th ....Development of Advanced Fracture Mechanics Models and Novel Technical Tools for Integrity, Durability and Safety Assessment. The proposed project will lead to the new understanding of fracture phenomena and structural integrity. It will create a range of novel computer based technical tools for life and integrity assessment of structures in the presence of cracks and other defects, so as to meet the high safety standards across a wide range of industries. The project will result in technology that will help to make Australian products stronger and more durable so they become more competitive with low cost overseas imports. All the research outcomes will have a direct benefit to Australian interests, including both public and private industries.Read moreRead less
Development of Models for the Three-Dimensional Analysis of Jack-Up Structures. Mobile jack-up structures perform most of the world's offshore drilling in water depths up to 120m, but have a higher accident rate then fixed installations. To improve their safety, this research will develop the framework for the integrated assessment of jack-up behaviour in three dimensions. To achieve this, an advanced plasticity model that describes cyclic behaviour of the circular shallow foundations of jack-up ....Development of Models for the Three-Dimensional Analysis of Jack-Up Structures. Mobile jack-up structures perform most of the world's offshore drilling in water depths up to 120m, but have a higher accident rate then fixed installations. To improve their safety, this research will develop the framework for the integrated assessment of jack-up behaviour in three dimensions. To achieve this, an advanced plasticity model that describes cyclic behaviour of the circular shallow foundations of jack-ups in both clay and sand will be developed and incorporated with random wave loading of seas in a dynamic structural analysis program. The anticipated advantages of the modelling techniques will be assessed against existing two dimensional industry guidelines and monitored field data. Read moreRead less
Investigation of potential spudcan punch through failure. The safe and economic use of mobile jack-up structures is critical to the prosperous development of Australia's significant offshore oil and gas industry. However, their use is hindered by potential 'punch-through' failure during installation, when their large conical footings can unexpectedly and uncontrollably push a locally strong zone of soil into underlying softer material. To improve their safety, this research will investigate a po ....Investigation of potential spudcan punch through failure. The safe and economic use of mobile jack-up structures is critical to the prosperous development of Australia's significant offshore oil and gas industry. However, their use is hindered by potential 'punch-through' failure during installation, when their large conical footings can unexpectedly and uncontrollably push a locally strong zone of soil into underlying softer material. To improve their safety, this research will investigate a potential new site-investigation procedure and develop an appropriate calculation method for predicting failures for sites where sand overlies clay. Results will be based on a series of innovative physical and numerical experiments, and assessed against field data and existing industry standards.Read moreRead less
Deterioration of structural integrity of ageing ships and marine platforms. Deterioration of structural integrity of ageing ships and marine platforms. This project will research the deterioration of structural integrity and remaining life of marine assets such as ships and offshore energy facilities, by integrating structural response analysis methods with aged-structure assessment techniques. Maritime assets exposed to ocean conditions suffer from time dependent phenomena, which reduce structu ....Deterioration of structural integrity of ageing ships and marine platforms. Deterioration of structural integrity of ageing ships and marine platforms. This project will research the deterioration of structural integrity and remaining life of marine assets such as ships and offshore energy facilities, by integrating structural response analysis methods with aged-structure assessment techniques. Maritime assets exposed to ocean conditions suffer from time dependent phenomena, which reduce structural capability, affect safety and could have catastrophic environmental and economic consequences. Making assets available and affordably safe is a problem for operators. The key to prolonging asset life is in understanding the interrelationships over time between the asset’s structural condition and its use. Anticipated outcomes are superior safety, expected lifetime and economic benefits of maritime assets.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE140100082
Funder
Australian Research Council
Funding Amount
$500,000.00
Summary
An Australasian facility for the automated fabrication of high performance bespoke components. A facility for the automated fabrication of high performance bespoke components: The project will create a new coordinated facility for composites research including modern automated infrastructure. The facility will bring Australia in line with leading international research centres and promote fundamental and applied research into a range of fields including underwater renewable energy systems, space ....An Australasian facility for the automated fabrication of high performance bespoke components. A facility for the automated fabrication of high performance bespoke components: The project will create a new coordinated facility for composites research including modern automated infrastructure. The facility will bring Australia in line with leading international research centres and promote fundamental and applied research into a range of fields including underwater renewable energy systems, space vehicle structures, multifunctional and smart materials and infrastructure capacity extension. The facility will position Australian research for significant international collaboration through endorsement of next-generation manufacturing technology and enable leading outcomes for Australasian science and engineering in aerospace, marine, civil, automotive, renewable energy and primary resources.Read moreRead less
Aggressive corrosion of steel infrastructure in marine environments. Marine corrosion is known to be aggressive, but how aggressive it can be under long term exposures is the critical question for the safety and economics of much industrial infrastructure, including harbour, coastal and offshore oil industry facilities. Bacterial and microbiological activity is known to contribute. However, recent findings have observed very aggressive corrosion also under sterile and apparently benign condition ....Aggressive corrosion of steel infrastructure in marine environments. Marine corrosion is known to be aggressive, but how aggressive it can be under long term exposures is the critical question for the safety and economics of much industrial infrastructure, including harbour, coastal and offshore oil industry facilities. Bacterial and microbiological activity is known to contribute. However, recent findings have observed very aggressive corrosion also under sterile and apparently benign conditions. No theory to explain these observations currently exists. A new hypothesis is proposed that in certain circumstances second-phase constituents of steels will facilitate autocatalytic corrosion under anoxic conditions. This project investigates the problem and explores mechanisms and conditions. Read moreRead less
Long-term corrosion of offshore steel structures in near-stagnant seawater. This project investigates the seawater corrosion of structural steels under near-stagnant and possibly polluted conditions. Better understanding of long-term corrosion of structural steels in near-stagnant seawaters is needed to predict the safety of steel offshore structures such as the pods supporting wind and wave energy generators. Also, the expensive maintenance of protective coatings and systems could be obviated o ....Long-term corrosion of offshore steel structures in near-stagnant seawater. This project investigates the seawater corrosion of structural steels under near-stagnant and possibly polluted conditions. Better understanding of long-term corrosion of structural steels in near-stagnant seawaters is needed to predict the safety of steel offshore structures such as the pods supporting wind and wave energy generators. Also, the expensive maintenance of protective coatings and systems could be obviated or reduced if corrosion remains acceptable. This project plans to investigate experimentally the temporal development and stochastic nature of general corrosion and pitting for steels under actual near-stagnant seawater conditions. It also plans to build mathematical-probabilistic models for corrosion prediction, calibrated to field data. These models will include allowance for microbiological corrosion effects, important under anthropological pollution.Read moreRead less