Research

My research involves developing computational models and analysis methods to study aeroelastic phenomena in the next generation of aerospace vehicles, focusing on both advancing the understanding of new configurations and supporting their design.


Research Areas

  • Flight dynamics and nonlinear aeroelasticity of future aircraft designs

  • Predicting flutter and post-flutter dynamics in nonlinear aeroelastic systems

  • Integrating geometrically nonlinear effects and dynamic aeroelasticity into optimization

  • Aeroelastic tailoring for alleviating aircraft loads and improving ride and handling qualities


Grants and Contracts

Whirl Flutter and Stability Analysis for Advanced VTOL Concepts

Funding: U.S. Army, U.S. Navy, and NASA under the Georgia Tech Vertical Lift Research Center of Excellence (VLRCOE)

Role: Co-PI with Carlos Cesnik (U-M), Dates: 2021–2026

Geometrically Nonlinear Effects and Dynamic Aeroelasticity in MDO

Funding: Airbus

Role: GT sub-award PI (2022), previously U-M key personnel (2017–2021), Dates: 2017–2022

Aeroelastic Tailoring for Gust Loads and Maneuver Loads

Funding: Airbus

Role: GT sub-award PI (2022), previously U-M key personnel (2017–2021), Dates: 2017–2022


Working Groups

Journal Articles

(* = co-first authors, ** = mentored student, articles from 2022 are published while a faculty member at Georgia Tech)

Total published articles: 10

2022

  • Riso, Cesnik, and Epureanu, "Estimating Flutter Bifurcation Diagrams Using the State Velocity", AIAA Journal [Link][Preprint]

2021

  • Riso, Cesnik, and Epureanu, "Output-Based Flutter Bifurcation Forecasting in Nonlinear Fluid-Structural Systems with Multiple Varying Parameters," Journal of Fluids and Structures [Link][Preprint]

2020

  • Riso*, Ghadami*, Cesnik, and Epureanu, "Data-Driven Forecasting of Postflutter Responses of Geometrically Nonlinear Wings," AIAA Journal [Link][Preprint]

2019

  • Jonsson, Riso, Lupp, Cesnik, Martins, and Epureanu, "Flutter and Post-Flutter Constraints in Aircraft Design Optimization," Progress in Aerospace Sciences [Link][Preprint]

  • Mastroddi, Martarelli, Eugeni, and Riso, "Time- and Frequency-Domain Linear Viscoelastic Modeling of Highly Damped Aerospace Structures," Mechanical Systems and Signal Processing [Link]

2018

  • Riso, Di Vincenzo, Ritter, Cesnik, and Mastroddi, "Nonlinear Aeroelastic Trim of Very Flexible Aircraft Described by Detailed Models," Journal of Aircraft [Link]

  • Riso, Riccardi, and Mastroddi, "Semi-Analytical Unsteady Aerodynamic Model of a Flexible Thin Airfoil," Journal of Fluids and Structures [Link]

  • Riso, Fransen, Mastroddi, Coppotelli, Trequattrini, and De Vivo, "Experimental Validation of Solid Rocket Motor Damping Models," CEAS Space Journal [Link]

2017

  • Saltari**, Riso, De Matteis, and Mastroddi, "Finite-Element-Based Modeling for Flight Dynamics and Aeroelasticity of Flexible Aircraft," Journal of Aircraft [Link]

2016

  • Riso, Riccardi, and Mastroddi, "Nonlinear Aeroelastic Modeling via Conformal Mapping and Vortex Method for a Flat-Plate Airfoil in Arbitrary Motion," Journal of Fluids and Structures [Link]

Under Revision

  • Jonsson, Riso, Monteiro, Gray, Martins, and Cesnik, "High-Fidelity Gradient-Based Wing Structural Optimization Including Geometrically Nonlinear Flutter Constraint"

  • Riso, Cesnik, and Epureanu, "A Post-Flutter Response Constraint for Gradient-Based Design Optimization"

  • Riso and Cesnik, "Impact of Low-Order Modeling on Aeroelastic Solution Accuracy for Very Flexible Wings"

  • Gray, Riso, Jonsson, Cesnik, and Martins, "High-fidelity Aerostructural Optimization with a Geometrically Nonlinear Flutter Constraint"

In Preparation

  • Sanghi, Riso, Cesnik, and Vetrano, "Impact of Aileron Placement on Roll Maneuverability of High-Aspect-Ratio-Wing Aircraft"

Conference Proceedings

(presenter, ** = mentored student, articles published in and after 2022 are published while a faculty member at Georgia Tech)

Total published articles: 20

2022

  • Riso and Cesnik, "Post-Flutter Analysis of the Pazy Wing Geometrically Nonlinear Benchmark Model," International Forum on Aeroelasticity and Structural Dynamics [Preprint][Data]

  • Sanghi**, Riso, Cesnik, and Vetrano, "Analysis of Ride Qualities in Transonic High-Aspect-Ratio-Wing Aircraft," International Forum on Aeroelasticity and Structural Dynamics [Preprint]

  • Gray, Riso, Jonsson, Martins, and Cesnik, "High-Fidelity Aerostructural Optimization with a Geometrically Nonlinear Flutter Constraint," International Forum on Aeroelasticity and Structural Dynamics [Preprint]

  • Riso and Cesnik, "Low-Order Geometrically Nonlinear Aeroelastic Modeling and Analysis of the Pazy Wing Experiment," AIAA SciTech Forum [Link][Preprint][Recording][Data]

  • Jonsson, Riso, Monteiro, Gray, Martins, and Cesnik, "High-Fidelity Gradient-Based Wing Structural Optimization Including a Geometrically Nonlinear Flutter Constraint," AIAA SciTech Forum [Link][Preprint][Recording]

  • Sanghi**, Riso, Cesnik, and Vetrano, "Conventional and Unconventional Control Effectors for Load Alleviation in High-Aspect-Ratio-Wing Aircraft," AIAA SciTech Forum [Link][Preprint][Recording]

2021

  • Riso, Cesnik, Epureanu, and Teufel, "A Post-Flutter Response Constraint for Gradient-Based Aircraft Design Optimization," AIAA AVIATION Forum [Link][Preprint][Recording]

  • Riso and Cesnik, "Correlations Between UM/NAST Nonlinear Aeroelastic Simulations and the Pre-Pazy Wing Experiment," AIAA SciTech Forum [Link][Preprint][Recording]

2020

  • Sanghi**, Riso, Cesnik, and Vetrano, "Influence of Aileron Placement on Roll Response of High-Aspect-Ratio-Wing Aircraft," AIAA AVIATION Forum [Link][Preprint]

  • Riso, Cesnik, and Epureanu, "Model-Free Nonlinear Flutter Forecasting in Fluid-Structural Systems with Multiple Varying Parameters," International Symposium on Flutter and its Application, canceled due to COVID-19 [Preprint]

  • Riso, Sanghi**, Cesnik, Vetrano, and Teufel, "Parametric Roll Maneuverability Analysis of a High-Aspect-Ratio-Wing Civil Transport Aircraft," AIAA SciTech Forum [Link][Preprint]

  • Sanghi**, Riso, Cesnik, and Vetrano, "Impact of Control-Surface Flexibility on the Dynamic Response of Flexible Aircraft," AIAA SciTech Forum [Link][Preprint]

2019

  • Riso, Ghadami, Cesnik, and Epureanu, "Model-Free Forecasting of Limit Cycle Oscillations in Geometrically Nonlinear Wings," International Forum on Aeroelasticity and Structural Dynamics [Link][Preprint]

  • Eugeni, Mastroddi, Saltari**, and Riso, "Structural Damping Models for Passive Aeroelastic Control," International Forum on Aeroelasticity and Structural Dynamics [Link]

2018

  • Riso, Fransen, Mastroddi, Coppotelli, Trequattrini, and De Vivo, "Assessment of Grain Damping Models for Finite Element Analysis of Solid Rocket Motors," European Conference on Spacecraft Structures, Materials, and Environmental Testing [Preprint]

  • Riso, Mastroddi, and Cesnik, "Coupled Flight Dynamics and Aeroelasticity of Very Flexible Aircraft Based on Commercial Finite Element Solvers," AIAA SciTech Forum [Link][Preprint]

2017

  • Saltari**, Mastroddi, Riso, De Matteis, and Colaianni, "On the Control of Aeroelastic/Flight Dynamic Integrated Stability of Maneuvering Aircraft," International Forum on Aeroelasticity and Structural Dynamics [Link]

  • Riso, Di Vincenzo, Ritter, Cesnik, and Mastroddi, "A FEM-Based Approach for Nonlinear Aeroelastic Trim of Highly Flexible Aircraft," International Forum on Aeroelasticity and Structural Dynamics [Link]

  • Riso, Riccardi, and Mastroddi, "Semi-analytical Unsteady Aerodynamic Modeling for a Flexible Thin Airfoil in Arbitrary Motion," International Forum on Aeroelasticity and Structural Dynamics [Link]

2015

  • Riso, Riccardi, and Mastroddi, "Nonlinear Aeroelastic Modeling via Conformal Mappings for a Typical Section in Arbitrary Motion," International Forum on Aeroelasticity and Structural Dynamics [Preprint]