Return to search

The effects of torsional-lateral coupling on the dynamics of a gear coupled rotor

This thesis focuses on the torsional-lateral interactions seen in gear coupled rotors. Of
particular interest are cases where the torsional stiffness parameters affect the lateral
critical speeds and where lateral stiffness and damping parameters affect torsional
critical speeds and amplitudes. A common procedure for critical speed calculations has
been to solve lateral and torsional systems separately. This procedure is tested through
an eigenvalue analysis. It is shown in this thesis, however, that torsional-lateral
interactions play major roles in each other's critical speeds. Some research has
seemingly uncoupled two lateral degrees of freedom from the gear system by choosing
bearing forces and a coordinate system pointing along the line of action and normal to
the line of action. This simplification method has been tested for cases when the lateral
bearing stiffness becomes asymmetric. The force generated by a rotating imbalance also
creates a variable moment arm as the center of mass rotates about the geometric center
of the gear. This variable moment arm is commonly neglected, but is included in the last
case study and its effects are displayed in the results section of this thesis.

Identiferoai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/4727
Date25 April 2007
CreatorsEmery, Michael Aaron
ContributorsVance, John M.
PublisherTexas A&M University
Source SetsTexas A and M University
Languageen_US
Detected LanguageEnglish
TypeBook, Thesis, Electronic Thesis, text
Format2391284 bytes, electronic, application/pdf, born digital

Page generated in 0.0018 seconds