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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

A Pareto-Based Genetic Algorithm Search Approach to Handle Damped Natural Frequency Constraints in Turbo Generator Rotor System Design

[+] Author and Article Information
Anders Angantyr, Jan Olov Aidanpää

Department of Applied Physics and Mechanical Engineering, Division of Computer Aided Design, Luleå University of Technology, Universitetsområdet, Porsön, SE 97187 Luleå, Sweden

J. Eng. Gas Turbines Power 126(3), 619-625 (Aug 11, 2004) (7 pages) doi:10.1115/1.1760529 History: Received October 01, 2002; Revised December 01, 2003; Online August 11, 2004
Copyright © 2004 by ASME
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References

Figures

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Schematic sketch of rotor-bearing model
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Damped natural frequency constraints for a generator rotor system. The colored regions are infeasible regions for the damped natural frequencies.
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Damped natural frequencies for nominal rotor-bearing system design. The design criterion is marked by the lines.
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Eigenmodes for nominal rotor-bearing system design
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Damped natural frequency results for 36 full factorial experiment for bearing factors. The geometrical factors are kept at their nominal values.
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Damped natural frequency results for 211 full factorial experiment for all factors
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Directions for movements of infeasible damped natural frequencies that results in a better design with respect to the damped natural frequency constraints
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Search result for min(D(X)) as objective and X=[k1,c1,k2,c2,k3,c3] as design variables. The population size is 30.
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Search result for min(D(X)) as objective and X=[k1,c1,k2,c2,k3,c3,L3,L7,L9,L10,L11] as design variables. The population size is 60.
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The initial and 400th generation in the objective space

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