Skip to main content

Computational study of aeroelastic limit cycles due to localized structural nonlinearities

Publication ,  Conference
Padmanabhan, MA; Dowell, EH; Pasiliao, CL
Published in: Journal of Aircraft
January 1, 2018

Aeroelastic systems including all-moving control surfaces and aircraft wings with stores may experience limit cycling caused by nonlinear structural and/or aerodynamic mechanisms. These systems are examined here via two different and complementary models, with nonlinear wing-root and nonlinear wing-store attachments, respectively, subjected to linear potential flow aerodynamic forces. Limit-cycle responses are obtained through an efficient computational method based on harmonic balance by using the spatially localized (hence mathematically separable) nature of the assumed nonlinearities. Results pertaining to a cubic hardening or softening restoring force in stiffness or damping, freeplay, and Coulomb friction are discussed along with confirmatory time-marching responses for selected cases. Clear relationships are established between the linear flutter behavior and the limit-cycle responses corresponding to each nonlinearity. Overall, this work provides an improved understanding, as compared to prior work, of the beneficial and/or detrimental effects of various localized nonlinearities on the aeroelastic response of all-moving control surfaces and store-carrying aircraft wings.

Duke Scholars

Published In

Journal of Aircraft

DOI

EISSN

1533-3868

ISSN

0021-8669

Publication Date

January 1, 2018

Volume

55

Issue

4

Start / End Page

1531 / 1541

Related Subject Headings

  • Aerospace & Aeronautics
  • 40 Engineering
  • 09 Engineering
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Padmanabhan, M. A., Dowell, E. H., & Pasiliao, C. L. (2018). Computational study of aeroelastic limit cycles due to localized structural nonlinearities. In Journal of Aircraft (Vol. 55, pp. 1531–1541). https://doi.org/10.2514/1.C034645
Padmanabhan, M. A., E. H. Dowell, and C. L. Pasiliao. “Computational study of aeroelastic limit cycles due to localized structural nonlinearities.” In Journal of Aircraft, 55:1531–41, 2018. https://doi.org/10.2514/1.C034645.
Padmanabhan MA, Dowell EH, Pasiliao CL. Computational study of aeroelastic limit cycles due to localized structural nonlinearities. In: Journal of Aircraft. 2018. p. 1531–41.
Padmanabhan, M. A., et al. “Computational study of aeroelastic limit cycles due to localized structural nonlinearities.” Journal of Aircraft, vol. 55, no. 4, 2018, pp. 1531–41. Scopus, doi:10.2514/1.C034645.
Padmanabhan MA, Dowell EH, Pasiliao CL. Computational study of aeroelastic limit cycles due to localized structural nonlinearities. Journal of Aircraft. 2018. p. 1531–1541.

Published In

Journal of Aircraft

DOI

EISSN

1533-3868

ISSN

0021-8669

Publication Date

January 1, 2018

Volume

55

Issue

4

Start / End Page

1531 / 1541

Related Subject Headings

  • Aerospace & Aeronautics
  • 40 Engineering
  • 09 Engineering