An Analytical Investigation of Damping of Landing Gear Shimmy

902015

09/01/1990

Event
Aerospace Technology Conference and Exposition
Authors Abstract
Content
Dual-wheeled main landing gears may encounter shimmy vibration under adverse conditions. An analytical investigation is made of energy dissipation from Coulomb friction in oleo main bearings and pressure seal and the contribution to shimmy damping. It is stabilizing but highly variable. Under favorable conditions it exceeds 10 % of critical viscous damping which would rapidly suppress vibration. Under severe conditions, it may be less than 1 %. This may not overcome destabilizing tire dynamics and shimmy incidents are more likely to occur. Strut closure rate and transient disturbances contribute to the loss of damping.
Meta TagsDetails
DOI
https://doi.org/10.4271/902015
Pages
8
Citation
Feld, D., "An Analytical Investigation of Damping of Landing Gear Shimmy," SAE Technical Paper 902015, 1990, https://doi.org/10.4271/902015.
Additional Details
Publisher
Published
Sep 1, 1990
Product Code
902015
Content Type
Technical Paper
Language
English