All Outputs (114)

Calculation of the System Unavailability Measures of Component Importance Using the D2T2 Methodology of Fault Tree Analysis (2024)
Journal Article

A recent development in Fault Tree Analysis (FTA), known as Dynamic and Dependent Tree Theory (D2T2), accounts for dependencies between the basic events, making FTA more powerful. The method uses an integrated combination of Binary Decision Diagrams... Read More about Calculation of the System Unavailability Measures of Component Importance Using the D2T2 Methodology of Fault Tree Analysis.

A Nested Petri Net Fault Tree Approach For System Dependency Modelling (2023)
Presentation / Conference

The Extension of Commonly used Measures of Importance for Dynamic and Dependent Tree Theory (D2T2 ) (2023)
Presentation / Conference

Extension of Common Measures of Importance for Dynamic and Dependent Tree Theory (D2T 2 ) (2023)
Presentation / Conference

A nested Petri Net – Fault Tree approach for modelling complex failure behaviour in engineering systems (2023)
Presentation / Conference

Analysing the impact of local factors on the life cycle of metallic bridge girders (2023)
Conference Proceeding

A fundamental component of a life cycle analysis of a bridge is the modelling of asset condition post-construction. To enhance the accuracy of bridge deterioration models, several studies have calibrated models based on cohorts that incorporate struc... Read More about Analysing the impact of local factors on the life cycle of metallic bridge girders.

Fault Tree Analysis Including Component Dependencies (2023)
Journal Article

Fault Tree analysis is not only the most common technique used in engineering practice for the estimation of system reliability, but is also a key tool shared between designers, analysts and regulators for safe operation and licensing purposes. In sp... Read More about Fault Tree Analysis Including Component Dependencies.

Extension of Common Measures of Importance for Dynamic and Dependent Tree Theory (D2T2 ) (2023)
Presentation / Conference

Traditional Fault Tree Analysis (FTA), known as Kinetic Tree Theory (KTT), was derived by Vesely [1] to model and analyse engineering systems. The tree structure provides a clear visual representation of the causes of system failure in terms of compo... Read More about Extension of Common Measures of Importance for Dynamic and Dependent Tree Theory (D2T2 ).

Dependent and Dynamic Tree Theory (D2T2 ) for Event Tree Applications (2023)
Presentation / Conference

The demand for innovative and effective computational tools able to improve the accuracy of present modelling methodologies has been fuelled by the ever-increasing complexity of engineering systems. In spite of their shortcomings, such as their inabi... Read More about Dependent and Dynamic Tree Theory (D2T2 ) for Event Tree Applications.

Dynamic safety and degradation analysis of an aircraft internal air system (2023)
Presentation / Conference

The modelling of the dynamic behaviour of engineering systems offers an invaluable insight in the evolution of degradation and response of systems to failure and represents an essential step to lay the basis for resilience analysis. While traditional... Read More about Dynamic safety and degradation analysis of an aircraft internal air system.

The Dynamic and Dependent Tree Theory (D2T2 ) methodology Developed for Fault Tree Analysis (2023)
Presentation / Conference

Fault Tree Analysis (FTA) has its origins back in the 1960’s with the mathematical framework, known as Kinetic Tree Theory (KTT) added at the end of the decade by Vesely. In KTT the analysis of the fault tree is performed in two stages. The first sta... Read More about The Dynamic and Dependent Tree Theory (D2T2 ) methodology Developed for Fault Tree Analysis.

Next Generation Prediction Methodologies and Tools for System Safety Analysis (NxGen) – A Project Overview (2023)
Presentation / Conference

Modern engineering systems are rapidly increasing in size and complexity, posing greater safety and risk management challenges than ever before. In addition to this, the threats to these engineering systems are constantly changing and new hazards eme... Read More about Next Generation Prediction Methodologies and Tools for System Safety Analysis (NxGen) – A Project Overview.

A Petri net model-based resilience analysis of nuclear power plants under the threat of natural hazards (2022)
Journal Article

Due to global climate change, nuclear power plants are increasingly exposed to the threats of extreme natural disasters. In this paper, a resilience engineering approach is applied to tackle all aspects of nuclear safety, spanning from design, operat... Read More about A Petri net model-based resilience analysis of nuclear power plants under the threat of natural hazards.

Dynamic and dependent tree theory (D2T2): A framework for the analysis of fault trees with dependent basic events (2022)
Journal Article

Fault tree analysis remains the most commonly employed method, particularly in the safety critical industries, to predict the probability or frequency of system failures. Whilst it has its origins back in the 1960s, the assumptions employed in the ma... Read More about Dynamic and dependent tree theory (D2T2): A framework for the analysis of fault trees with dependent basic events.

Optimisation of nuclear reactor primary coolant design and maintenance parameters (2022)
Journal Article

An optimisation methodology is presented using the primary coolant circulation system of a nuclear reactor as its case study, the purpose of which is to find combinations of selected design and maintenance parameters to maximise the reactor safety an... Read More about Optimisation of nuclear reactor primary coolant design and maintenance parameters.

An integrated modelling framework for complex systems safety analysis (2022)
Journal Article

The ever-increasing complexity of engineering systems has fuelled the need for novel and efficient computational tools able to enhance the accuracy of current modelling strategies for industrial systems. Indeed, traditional Fault and Event Tree techn... Read More about An integrated modelling framework for complex systems safety analysis.

A Petri Net approach to the Risk Analysis of Jet Engines (2022)
Conference Proceeding

Traditional risk analysis techniques such as Fault Trees and Event Trees fail to model complex aspects of systems behaviour such as components dependencies, degradation, limiting their capability of representing modern engineering systems. This is al... Read More about A Petri Net approach to the Risk Analysis of Jet Engines.

Dynamic and Dependent Tree Theory (D 2 T 2 ): A Fault Tree Analysis Framework (2022)
Conference Proceeding

A modelling framework, known as Dynamic and Dependent Tree Theory, is provided which overcomes restrictions in the Kinetic Tree Theory developed in the 1970s for the analysis of fault trees. Kinetic Tree Theory assumes basic events to be independent... Read More about Dynamic and Dependent Tree Theory (D 2 T 2 ): A Fault Tree Analysis Framework.

Fault Tree analysis including component dependencies (2022)
Conference Proceeding

The inability of commonly used risk assessment methodologies to model component dependency is often recognised to be a barrier towards more realistic modelling of systems complexity. This is a significant limitation associated with widely adopted tec... Read More about Fault Tree analysis including component dependencies.

An Integrated Modelling Framework for Complex Systems Safety Analysis: Case-Studies (2022)
Conference Proceeding

The ever-increasing complexity of engineering systems has fuelled the need for novel and efficient computational tools able to enhance the accuracy of current modelling strategies for industrial systems. Indeed, traditional Fault and Event Tree techn... Read More about An Integrated Modelling Framework for Complex Systems Safety Analysis: Case-Studies.