English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Freeplay is a significant source of nonlinearity in aeroelastic systems andis strictly regulated by airworthiness authorities. It splits the phase planeof such systems into three piecewise linear subdomains. Depending on thelocation of the freeplay, limit cycle oscillations can result that span eithertwo or three of these subdomains. The purpose of this work is to demonstratethe existence of two-domain cycles both theoretically and experimentally. Asimple aeroelastic system with pitch, plunge and control deflection degrees offreedom is investigated in the presence of freeplay in pitch. It is shown thattwo-domain and three-domain cycles can result from a grazing bifurcation andpropagate in the decreasing airspeed direction. Close to the bifurcation, thetwo limit cycle branches interact with each other and aperiodic oscillationsensue. Equivalent linearization is used to derive the conditions of existenceof each type of limit cycle and to predict their amplitudes and frequencies.Comparisons with measurements from wind tunnel experiments demonstrate that thetheory describes these phenomena with accuracy.

Two-domain and three-domain limit cycles in a typical aeroelastic system with freeplay in pitch