Assessing higher-order effects of nonlinearities in a 2-DOF airfoil coupled a nonlinear energy sink using discrepancy modeling frameworks

• Grant number: 24/20435-6
• Support Opportunities: Scholarships abroad - Research Internship - Scientific Initiation
• Start date: February 01, 2025
• End date: March 31, 2025
• Field of knowledge: Engineering - Aerospace Engineering - Aerospace Structures
• Principal Investigator: Flávio Donizeti Marques
• Grantee: João Pedro Calegari Mantovani
• Supervisor: Rafael de Oliveira Teloli
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Institution abroad: Institut Franche-Comté Electronique Mécanique Thermique Et Optique - Sciences Et Technologies, France
• Associated to the scholarship: 24/12620-8 - Control of aeroelastic vibration aplling non-linear vibration absorbers with time-delay, BP.IC

Abstract

In applied sciences, it is common to have a general system of governing equations that describe the behavior and development of the dynamical system. But, thisset of equations is derived from conservation laws, positing empirical relations betweenvariables or through asymptotic reductions. Such a problem is also present in complexaeroelasticity analyses. Therefore, considering a two-degrees-of-freedom airfoil model withstructural nonlinearities of hardening type and a nonlinear energy sink device coupled init, which has a cubic stiffness, i.e., another nonlinearity, this project aims to use a dis-crepancy modeling framework to assess higher-order effects in this system. The presentproposal complements the original project's scope (FAPESP #2024/12620-8) and helpsto understand the complexity and reality of the system studied.