Computer-aided design software for rotor dynamics analysis

An analytical technique for determining the damped or undamped critical speeds and generating a critical speed map for a general flexible rotor in isotropic bearings has been developed. Rotordynamics theory related to this research work is studied including synchronous unbalance response, critical speed, gyroscopic effect, critical speed map, and stability. The method of solution is based on the Transfer Matrix approach containing both real and complex variable notations for deriving the overall system matrices. Muller's Method is applied to search for real or complex eigenvalues of the system. The corresponding mode shapes are found by back substitution. An accurate and efficient computer program, BEAM VII, has been designed to perform the analysis. Through the discussion of a series of numerical examples published by other authors, the confirmation of the rotor dynamics theory and precision of the computer code are achieved.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Mechanical Engineering

Department dc:contributor.department

Mechanical Engineering

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

1994

Author dc:creator

• Tu, Chihyung

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Dc Identifier Other

etd-07102009-040616

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/43645