Vibration transmission through rolling element bearings in geared rotor systems. Ph. D. Thesis Final Report

Technical Report · Thu Nov 01 04:00:00 EST 1990

OSTI ID:5484610

Singh, R; Lim, T C

A new mathematical model is proposed to examine the vibration transmission through rolling element bearings in geared rotor systems. Current bearing models, based on either ideal boundary conditions for the shaft or purely translational stiffness element description, cannot explain how the vibratory motion may be transmitted from the rotating shaft to the casing. Experimental results have shown that the casing plate motion is primarily flexural. Here, this issue is clarified qualitatively and quantitatively by developing a comprehensive bearing stiffness matrix of dimension 6 to model precision rolling element bearings using basic principles. The proposed bearing stiffness matrix is partially verified using available analytical and experimental data, and is completely characterized. The study extends the proposed bearing formulation to analyze the overall geared rotor system dynamics including casing and mounts. The bearing stiffness matrix is included in discrete system models using lumped parameter and/or dynamic finite element techniques.

• Research Organization: Ohio State Univ., Columbus, OH (United States)
• OSTI ID: 5484610
• Report Number(s): N-91-19435; NASA-CR--4334; AVSCOM-TR--90-C-019; E--5716; NAS--1.26:4334; CNN: NAG3-773
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200* -- Engineering-- Facilities
Equipment
& Techniques
BEARINGS
BOUNDARY CONDITIONS
FINITE ELEMENT METHOD
MACHINE PARTS
MATHEMATICAL MODELS
MECHANICAL STRUCTURES
MECHANICAL VIBRATIONS
NUMERICAL SOLUTION
ROLLER BEARINGS
ROTORS
SHAFTS
SUPPORTS