Irina Afanasyeva | University of Florida (original) (raw)

Papers by Irina Afanasyeva

Research paper thumbnail of Numerical simulation of an elastic structure behavior under transient fluid flow excitation

AIP Conference Proceedings, 2017

Computational study of flow-induced vibration of a reed in a channel and effect on convective hea... more Computational study of flow-induced vibration of a reed in a channel and effect on convective heat transfer

Research paper thumbnail of Simulation of Aerodynamic Instability of Building Structures on the Example of a Bridge Section. Part 2: Solution of the Problem in a Coupled Aeroelastic Formulation and Comparison with Engineering Estimates

International Journal for Computational Civil and Structural Engineering, 2021

In this paper, we study aerodynamic instability using the example of a two-dimensional problem of... more In this paper, we study aerodynamic instability using the example of a two-dimensional problem of flow around a simplified section of a flexible suspension bridge (on the Tacoma River, USA). A direct dynamic coupled calculation was performed to determine the critical speed of manifestation of aerodynamic instability. The results obtained were compared with the results of engineering estimates presented in [40]. This example shows that to solve such problems it is possible to use the lighter des turbulence model instead of the les turbulence model and, therefore, a coarser mesh. In contrast to existing engineering techniques, direct numerical modeling of the interaction between the structure and the air flow allows one to take into account the reverse effect of the structure on the flow, as well as the mutual influence of several types ofaerodynamic instability.

Research paper thumbnail of About “Legitimization” of Numerical Modelling of Wind Impacts on Buildings and Structures in Design Codes

International Journal for Computational Civil and Structural Engineering, 2019

The distinctive paper is detoded to problem of “legitimization” of numerical modelling of wind lo... more The distinctive paper is detoded to problem of “legitimization” of numerical modelling of wind loads and impacts on buildings and structures. General information about computational fluid dynamics (CFD) and its development prospects is presented. The main advantages and disadvantages of numerical simulation compared with tests in wind tunnels (wind tunnel tests) are considered. Besides, information about the second modification of corresponding Russian design codes (SP 20.13330.2016 “SNiP 2.01.07-85* Loads and effects”) is provided. Prospects for the further development of numerical modelling and its applications for solution of problems of construction aerodynamics are given.

Research paper thumbnail of Estimation of Pedestrian Comfort on the Basis of Numerical Modeling of Wind Aerodynamics of Buildings in the Environmental Development

International Journal for Computational Civil and Structural Engineering, 2019

The distinctive paper is devoted to the methodology of pedestrian comfort estimation in the nearb... more The distinctive paper is devoted to the methodology of pedestrian comfort estimation in the nearby ar­ea of the object under construction. A verification example of the wind flow simulation around and through a po­rous object is considered in order to select correct permeability parameters of the computational model of green spaces. The methodology of pedestrian comfort estimation is tested on the example of a real residential complex in Moscow. The results of the numerical simulation of velocity fields are used to calculate the criteria for pedes­trian comfort specified in MDS 20-1.2006. Numerical results are obtained and compared for two study cases - without and with green spaces (bushes),to assess their impact on pedestrian comfort and the possibility of its ad­justment.

Research paper thumbnail of Numerical simulation of loads and impacts, stress-strain state, strength and stability of unique structures, buildings and facilities. Experience of StaDyO research & engineering centre

IOP Conference Series: Materials Science and Engineering, 2018

The paper contains analytical overview of the most important unique/critical objects and the comp... more The paper contains analytical overview of the most important unique/critical objects and the computational analysis problems of the mechanical safety, carried out by the team of Research & Development Centre StaDyO (StaDyO R&D Centre) researchers for the last two years (2016-2018). Corresponding complex coupled problems of continuum mechanics were solved with the use of contemporary methods and models of numerical modeling (nonlinear models, coupled problems, substructures, submodeling, etc.), implemented in verified software complexes. Some of these results are briefly considered and analyzed. Conclusions about the main directions of further research and development are presented as well.

Research paper thumbnail of Contemporary Problems of Numerical Modelling of Unique Structures and Buildings

International Journal for Computational Civil and Structural Engineering, 2017

The distinctive paper is devoted to contemporary problems of numerical modelling of unique struct... more The distinctive paper is devoted to contemporary problems of numerical modelling of unique structures, buildings and facilities and corresponding directions of activity of Scientific Research Center “StaDyO” including development, verification and use of corresponding software, development and refinement of methods of structural analysis, solution of scientific and technical problems, scientific and educational activity. Experience in theoretical and practical computational analysis is under consideration as well (26-year history).

Research paper thumbnail of About Contemporary Problems of Numerical Modelling of Unique Structures, Buildings and Facilities

MATEC Web of Conferences, 2017

This paper is devoted to contemporary problems of numerical modeling of unique structures, buildi... more This paper is devoted to contemporary problems of numerical modeling of unique structures, buildings and facilities and corresponding directions of activity of Scientific Research Center "StaDyO" including development, verification and advanced of corresponding software, development and refinement of methods of structural analysis, solution of scientific and technical problems, scientific and educational activity. Experience in theoretical and practical computational analysis is under consideration as well (26-year history).

Research paper thumbnail of Investigation of aerodynamic instability of a thin plate

MATEC Web of Conferences, 2017

This paper is devoted to methods and principles of investigation of aerodynamic instability of st... more This paper is devoted to methods and principles of investigation of aerodynamic instability of structures. Object of interest is a thin plate. This is an important aspect of the design of large-span structures, bridges and other structures sensitive to wind loads. As Russian standards and Eurocode obliges to check the conditions for the occurrence of galloping, divergence and flutter for a certain class of structures. Modern computing facilities allow to calculate aerodynamic coefficients with high accuracy.

Research paper thumbnail of Verificated Techniques for the Numerical Simulation of Extreme Impacts on NPP Constructions

Procedia Engineering, 2015

The distinctive paper is devoted to advanced methods of analysis, choice of appropriate and corre... more The distinctive paper is devoted to advanced methods of analysis, choice of appropriate and correct methods and software application packages for numerical simulation of external loads and impacts on the basic structures of nuclear power plants (wind hurricane, tornado, plane crash, the impact of the shock wave, seismic and tsunami effect). The article gives examples of representative calculations.

Research paper thumbnail of Numerical Simulation of Oil Tank Behavior Under Seismic Excitation. Fluid – Structure Interaction Problem Solution

Procedia Engineering, 2015

The present paper is devoted to numerical simulation of sloshing inside a partially filled cylind... more The present paper is devoted to numerical simulation of sloshing inside a partially filled cylindrical thin-wall tank induced by seismic loads. During the calculations fluid structure interaction (FSI) problems are taken into account. The numerical simulations are performed for both linear (Lagrangian formulation-ANSYS Mechanical) and nonlinear (arbitrary Lagrangian-Eulerian formulation-ABAQUS/Explicit) conditions. Problem formulation, finite element discretization, simultaneous and partitioned solution procedures are discussed. As an example designed and/or already erected oil tank are considered. The results obtained are compared with an analytical solution and domestic code technique.

Research paper thumbnail of External Extreme Impacts on NPP Constructions – Methodology of Computational Simulation

Advanced Materials Research, 2014

In accordance with results of analysis of state-of-the-art theoretical and experimental research ... more In accordance with results of analysis of state-of-the-art theoretical and experimental research works, analysis and synthesis of data on the impact of extreme impacts on structures of existing nuclear power plants (including NPP "Fukushima-1", Japan), and other unique objects, the existing regulations, corresponding design codes and procedures do not fully take into account the specific definition of extreme (special) external loads and impacts on the main building of NPP, and, therefore, require clarification and development. The distinctive paper is devoted to advanced methods of analysis, choice of appropriate and correct methods and software application packages for numerical simulation of external loads and impacts on the basic structures of nuclear power plants (wind hurricane, tornado, plane crash, the impact of the shock wave, seismic and tsunami effect). Results of development, adaptation and verification (with the use of universal software application packages) ...

Research paper thumbnail of Hybrid Preliminary Virtual Reconnaissance Report-Early Access Reconnaissance Report (PVRR-EARR)

This report will serve as StEER's primary product documenting this unique response to Hurrica... more This report will serve as StEER's primary product documenting this unique response to Hurricane Laura, combining elements of StEER's standard Preliminary Virtual Reconnaissance Report and Early Access Reconnaissance Report in to a single joint PVRR-EARR, that: (1) provides an overview of the Hurricane Laura, particularly relating to its wind field and storm surge impacts on the built environment, (2) documents the joint effects of the COVID-19 pandemic and Hurricane Laura on affected populations and emergency management, (3) overviews the regulatory environment and construction practices in the affected area, (4) outlines StEER's event response and reconnaissance methodology, (5) summarizes the damage reports in public and social media, as well as observations recorded by StEER FASTs to document the performance of a wide range of buildings and other infrastructure, and (6) recommends topics worthy of continued study by the natural hazards engineering research community a...

Research paper thumbnail of Numerical simulation of an elastic structure behavior under transient fluid flow excitation

AIP Conference Proceedings, 2017

Computational study of flow-induced vibration of a reed in a channel and effect on convective hea... more Computational study of flow-induced vibration of a reed in a channel and effect on convective heat transfer

Research paper thumbnail of Simulation of Aerodynamic Instability of Building Structures on the Example of a Bridge Section. Part 2: Solution of the Problem in a Coupled Aeroelastic Formulation and Comparison with Engineering Estimates

International Journal for Computational Civil and Structural Engineering, 2021

In this paper, we study aerodynamic instability using the example of a two-dimensional problem of... more In this paper, we study aerodynamic instability using the example of a two-dimensional problem of flow around a simplified section of a flexible suspension bridge (on the Tacoma River, USA). A direct dynamic coupled calculation was performed to determine the critical speed of manifestation of aerodynamic instability. The results obtained were compared with the results of engineering estimates presented in [40]. This example shows that to solve such problems it is possible to use the lighter des turbulence model instead of the les turbulence model and, therefore, a coarser mesh. In contrast to existing engineering techniques, direct numerical modeling of the interaction between the structure and the air flow allows one to take into account the reverse effect of the structure on the flow, as well as the mutual influence of several types ofaerodynamic instability.

Research paper thumbnail of About “Legitimization” of Numerical Modelling of Wind Impacts on Buildings and Structures in Design Codes

International Journal for Computational Civil and Structural Engineering, 2019

The distinctive paper is detoded to problem of “legitimization” of numerical modelling of wind lo... more The distinctive paper is detoded to problem of “legitimization” of numerical modelling of wind loads and impacts on buildings and structures. General information about computational fluid dynamics (CFD) and its development prospects is presented. The main advantages and disadvantages of numerical simulation compared with tests in wind tunnels (wind tunnel tests) are considered. Besides, information about the second modification of corresponding Russian design codes (SP 20.13330.2016 “SNiP 2.01.07-85* Loads and effects”) is provided. Prospects for the further development of numerical modelling and its applications for solution of problems of construction aerodynamics are given.

Research paper thumbnail of Estimation of Pedestrian Comfort on the Basis of Numerical Modeling of Wind Aerodynamics of Buildings in the Environmental Development

International Journal for Computational Civil and Structural Engineering, 2019

The distinctive paper is devoted to the methodology of pedestrian comfort estimation in the nearb... more The distinctive paper is devoted to the methodology of pedestrian comfort estimation in the nearby ar­ea of the object under construction. A verification example of the wind flow simulation around and through a po­rous object is considered in order to select correct permeability parameters of the computational model of green spaces. The methodology of pedestrian comfort estimation is tested on the example of a real residential complex in Moscow. The results of the numerical simulation of velocity fields are used to calculate the criteria for pedes­trian comfort specified in MDS 20-1.2006. Numerical results are obtained and compared for two study cases - without and with green spaces (bushes),to assess their impact on pedestrian comfort and the possibility of its ad­justment.

Research paper thumbnail of Numerical simulation of loads and impacts, stress-strain state, strength and stability of unique structures, buildings and facilities. Experience of StaDyO research & engineering centre

IOP Conference Series: Materials Science and Engineering, 2018

The paper contains analytical overview of the most important unique/critical objects and the comp... more The paper contains analytical overview of the most important unique/critical objects and the computational analysis problems of the mechanical safety, carried out by the team of Research & Development Centre StaDyO (StaDyO R&D Centre) researchers for the last two years (2016-2018). Corresponding complex coupled problems of continuum mechanics were solved with the use of contemporary methods and models of numerical modeling (nonlinear models, coupled problems, substructures, submodeling, etc.), implemented in verified software complexes. Some of these results are briefly considered and analyzed. Conclusions about the main directions of further research and development are presented as well.

Research paper thumbnail of Contemporary Problems of Numerical Modelling of Unique Structures and Buildings

International Journal for Computational Civil and Structural Engineering, 2017

The distinctive paper is devoted to contemporary problems of numerical modelling of unique struct... more The distinctive paper is devoted to contemporary problems of numerical modelling of unique structures, buildings and facilities and corresponding directions of activity of Scientific Research Center “StaDyO” including development, verification and use of corresponding software, development and refinement of methods of structural analysis, solution of scientific and technical problems, scientific and educational activity. Experience in theoretical and practical computational analysis is under consideration as well (26-year history).

Research paper thumbnail of About Contemporary Problems of Numerical Modelling of Unique Structures, Buildings and Facilities

MATEC Web of Conferences, 2017

This paper is devoted to contemporary problems of numerical modeling of unique structures, buildi... more This paper is devoted to contemporary problems of numerical modeling of unique structures, buildings and facilities and corresponding directions of activity of Scientific Research Center "StaDyO" including development, verification and advanced of corresponding software, development and refinement of methods of structural analysis, solution of scientific and technical problems, scientific and educational activity. Experience in theoretical and practical computational analysis is under consideration as well (26-year history).

Research paper thumbnail of Investigation of aerodynamic instability of a thin plate

MATEC Web of Conferences, 2017

This paper is devoted to methods and principles of investigation of aerodynamic instability of st... more This paper is devoted to methods and principles of investigation of aerodynamic instability of structures. Object of interest is a thin plate. This is an important aspect of the design of large-span structures, bridges and other structures sensitive to wind loads. As Russian standards and Eurocode obliges to check the conditions for the occurrence of galloping, divergence and flutter for a certain class of structures. Modern computing facilities allow to calculate aerodynamic coefficients with high accuracy.

Research paper thumbnail of Verificated Techniques for the Numerical Simulation of Extreme Impacts on NPP Constructions

Procedia Engineering, 2015

The distinctive paper is devoted to advanced methods of analysis, choice of appropriate and corre... more The distinctive paper is devoted to advanced methods of analysis, choice of appropriate and correct methods and software application packages for numerical simulation of external loads and impacts on the basic structures of nuclear power plants (wind hurricane, tornado, plane crash, the impact of the shock wave, seismic and tsunami effect). The article gives examples of representative calculations.

Research paper thumbnail of Numerical Simulation of Oil Tank Behavior Under Seismic Excitation. Fluid – Structure Interaction Problem Solution

Procedia Engineering, 2015

The present paper is devoted to numerical simulation of sloshing inside a partially filled cylind... more The present paper is devoted to numerical simulation of sloshing inside a partially filled cylindrical thin-wall tank induced by seismic loads. During the calculations fluid structure interaction (FSI) problems are taken into account. The numerical simulations are performed for both linear (Lagrangian formulation-ANSYS Mechanical) and nonlinear (arbitrary Lagrangian-Eulerian formulation-ABAQUS/Explicit) conditions. Problem formulation, finite element discretization, simultaneous and partitioned solution procedures are discussed. As an example designed and/or already erected oil tank are considered. The results obtained are compared with an analytical solution and domestic code technique.

Research paper thumbnail of External Extreme Impacts on NPP Constructions – Methodology of Computational Simulation

Advanced Materials Research, 2014

In accordance with results of analysis of state-of-the-art theoretical and experimental research ... more In accordance with results of analysis of state-of-the-art theoretical and experimental research works, analysis and synthesis of data on the impact of extreme impacts on structures of existing nuclear power plants (including NPP "Fukushima-1", Japan), and other unique objects, the existing regulations, corresponding design codes and procedures do not fully take into account the specific definition of extreme (special) external loads and impacts on the main building of NPP, and, therefore, require clarification and development. The distinctive paper is devoted to advanced methods of analysis, choice of appropriate and correct methods and software application packages for numerical simulation of external loads and impacts on the basic structures of nuclear power plants (wind hurricane, tornado, plane crash, the impact of the shock wave, seismic and tsunami effect). Results of development, adaptation and verification (with the use of universal software application packages) ...

Research paper thumbnail of Hybrid Preliminary Virtual Reconnaissance Report-Early Access Reconnaissance Report (PVRR-EARR)

This report will serve as StEER's primary product documenting this unique response to Hurrica... more This report will serve as StEER's primary product documenting this unique response to Hurricane Laura, combining elements of StEER's standard Preliminary Virtual Reconnaissance Report and Early Access Reconnaissance Report in to a single joint PVRR-EARR, that: (1) provides an overview of the Hurricane Laura, particularly relating to its wind field and storm surge impacts on the built environment, (2) documents the joint effects of the COVID-19 pandemic and Hurricane Laura on affected populations and emergency management, (3) overviews the regulatory environment and construction practices in the affected area, (4) outlines StEER's event response and reconnaissance methodology, (5) summarizes the damage reports in public and social media, as well as observations recorded by StEER FASTs to document the performance of a wide range of buildings and other infrastructure, and (6) recommends topics worthy of continued study by the natural hazards engineering research community a...