@article{kirschmeier_pash_gianikos_medina_gopalarathnam_bryant_2020, title={Aeroelastic inverse: Estimation of aerodynamic loads during large amplitude limit cycle oscillations}, volume={98}, ISSN={["0889-9746"]}, DOI={10.1016/j.jfluidstructs.2020.103131}, abstractNote={This paper presents an algorithm to compute the aerodynamic forces and moments of an aeroelastic wing undergoing large amplitude heave and pitch limit cycle oscillations. The technique is based on inverting the equations of motion to solve for the lift and moment experienced by the wing. Bayesian inferencing is used to estimate the structural parameters of the system and generate credible intervals on the lift and moment calculations. The inversion technique is applied to study the affect of mass coupling on limit cycle oscillation amplitude. Examining the force, power, and energy of the system, the reasons for amplitude growth with wind speed can be determined. The results demonstrate that the influence of mass coupling on the pitch–heave difference is the driving factor in amplitude variation. The pitch–heave phase difference not only controls how much aerodynamic energy is transferred into the system but also how the aerodynamic energy is distributed between the degrees of freedom.}, journal={JOURNAL OF FLUIDS AND STRUCTURES}, author={Kirschmeier, Benjamin and Pash, Graham and Gianikos, Zachary and Medina, Albert and Gopalarathnam, Ashok and Bryant, Matthew}, year={2020}, month={Oct} }
 @article{kirschmeier_gianikos_gopalarathnam_bryant_2020, title={Amplitude Annihilation in Wake-Influenced Aeroelastic Limit-Cycle Oscillations}, volume={58}, ISSN={["1533-385X"]}, DOI={10.2514/1.J058942}, abstractNote={This paper investigates the dynamics of a pitching and heaving aeroelastic wing undergoing large-amplitude limit-cycle oscillations influenced by a vortical wake from an upstream rectangular cylind...}, number={9}, journal={AIAA JOURNAL}, author={Kirschmeier, Benjamin A. and Gianikos, Zachary and Gopalarathnam, Ashok and Bryant, Matthew}, year={2020}, month={Sep}, pages={4117–4127} }
 @article{gianikos_kirschmeier_gopalarathnam_bryant_2020, title={Limit cycle characterization of an aeroelastic wing in a bluff body wake}, volume={95}, ISSN={["1095-8622"]}, DOI={10.1016/j.jfluidstructs.2020.102986}, abstractNote={This paper presents an experimental investigation aimed at characterizing the kinematics of a pitching-heaving aeroelastic wing placed downstream of a rectangular bluff body. The influence of the bluff body wake on the wing is twofold: a viscous wake which produces a velocity deficit downstream and an oscillating induced velocity field due to periodic vortex shedding. The latter effect is the focus of this paper, specifically, the interaction between the wake frequency and the wing limit cycle oscillation (LCO) frequency. Wind tunnel experiments showed that the presence of the upstream bluff body causes modulation of the LCO amplitude. The modulation resembles a beat phenomenon, however the modulation frequency is related to the third harmonic of fLCO rather than the fundamental frequency. The modulation behavior also differs from that of a beat in that the spectral content contains sideband frequencies, characteristic of a multiplication between a carrier wave and a modulation wave rather than a simple sinusoidal superposition. Additionally, the streamwise spacing between the bluff body and the wing significantly influences the wing kinematics, with a closer spacing between the two bodies increasing the intensity of the amplitude modulation. For shedding frequencies sufficiently close to the LCO third harmonic, reducing this streamwise distance was shown to induce an alternation between two distinct modes of amplitude modulation, each with its own intensity and frequency.}, number={0}, journal={JOURNAL OF FLUIDS AND STRUCTURES}, author={Gianikos, Zachary N. and Kirschmeier, Benjamin A. and Gopalarathnam, Ashok and Bryant, Matthew}, year={2020}, month={May} }
 @inproceedings{pham_gianikos_narayanaswamy_2018, title={Compression ramp induced shock wave/turbulent boundary layer interactions on a compliant material}, volume={56}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85141619302&partnerID=MN8TOARS}, DOI={10.2514/6.2018-0095}, number={7}, booktitle={AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2018}, author={Pham, H.T. and Gianikos, Z.N. and Narayanaswamy, Venkat}, year={2018}, pages={2925–2929} }