Optimization of nonlinear energy sinks for the mitigation of limit cycle oscillations

Bharath Pidaparthi, Samy Missoum

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper investigates the mitigation of limit cycle oscillations (LCOs) using optimally designed nonlinear energy sinks (NESs). The study is based on a NES attached to a two degree-of-freedom airfoil with nonlinear stiffness in pitch and heave. Depending on the nonlinear properties of the airfoil, it can exhibit super-or sub-critical LCOs. The design of the NES is based on a stochastic optimization approach, which accounts for various sources of uncertainties, including initial and loading conditions. The optimization approach is also tailored to handle potential discontinuities in the response of the airfoil. The non-smoothness of the response can be either due to sub-critical LCOs or to the activation of the NES. Several stochastic optimization problems with the objective of maximizing the mean reduction of LCOs are presented.

Original languageEnglish (US)
Title of host publication2018 Multidisciplinary Analysis and Optimization Conference
Publisher[publishername] American Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105500
DOIs
Publication statusPublished - Jan 1 2018
Event19th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2018 - [state] GA, United States
Duration: Jun 25 2018Jun 29 2018

Other

Other19th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2018
CountryUnited States
City[state] GA
Period6/25/186/29/18

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ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering

Cite this

Pidaparthi, B., & Missoum, S. (2018). Optimization of nonlinear energy sinks for the mitigation of limit cycle oscillations. In 2018 Multidisciplinary Analysis and Optimization Conference [AIAA 2018-3569] [publishername] American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2018-3569