Loads reduction using coupled fluidic pitch links

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

3 Scopus citations

Abstract

Coupled fluidlastic pitch links are proposed to reduce pitch link loads at multiple frequencies. The governing equations of motion are derived for the coupled fluid/mechanical system under temporally and spatially periodic loading. The dynamic characteristics of the coupled fluidic system are investigated to explore the potential for multi-frequency pitch link loads control. The frequency responses of two and four coupled fluidic pitch links illustrate that the fluidic system can simultaneously reduce several higher harmonic pitch link loads. The forcing phase delay and the fluid inertance work together to reduce the loads at several frequencies. The inertance of the fluid can be adjusted by changing the diameter and/or length of the coupling fluidic tubes and optimized to minimize transmitted loads. The simulation results demonstrate that two fluidic pitch links can reduce up to 28.8% of the 2/rev-7/rev loads at most. Four coupled fluidic pitch links reduce pitch link loads by 33.5%. An example shows the influence of the variable rotor speed on the performance of the fluidic pitch links.

Original languageEnglish (US)
Title of host publication52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
DOIs
StatePublished - Dec 1 2011
Event52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Denver, CO, United States
Duration: Apr 4 2011Apr 7 2011

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
ISSN (Print)0273-4508

Other

Other52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityDenver, CO
Period4/4/114/7/11

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All Science Journal Classification (ASJC) codes

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Han, D., Rahn, C. D., & Smith, E. C. (2011). Loads reduction using coupled fluidic pitch links. In 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference [AIAA 2011-1878] (Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference). https://doi.org/10.2514/6.2011-1878