Accession Number : ADA339051

Title :   Viscous Damping in the Drive Train of a Gas Turbine Engine

Descriptive Note : Final rept. Apr-Nov 97

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Korjack, T. A.

PDF Url : ADA339051

Report Date : MAR 1998

Pagination or Media Count : 29

Abstract : Overdamping that is common to a single degree of freedom damped linear vibratory system was extended to multidegree of freedom damped linear system, viz., a drive train situated in a typical gas turbine. Inequalities involving the mass, damping and stiffness parameters were derived to form a system with a free response which is overdamped in each respective node. A general method to be employed in establishing the design parameters for designing systems to be overdamped in each mode has been identified for purposes of analysis, and the method was utilized to a four degree of freedom model of a drive train in a gas turbine engine with a new look at a solution methodology for overdamping considerations. This technique or method for eliminating oscillations in n-degree of freedom lumped parameter systems by increasing the amount of viscous damping in the system has been illustrated by using actual data.

Descriptors :   *DAMPING, *GAS TURBINES, *DRIVES, *VISCOSITY, *TANK ENGINES, LINEAR SYSTEMS, VIBRATION, ARMY RESEARCH, PARAMETERS, STIFFNESS, DEGREES OF FREEDOM, OSCILLATION, TANKS(COMBAT VEHICLES), MECHANICAL COMPONENTS.

Subject Categories : Logistics, Military Facilities and Supplies
      Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE