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Abstract

In general, the dynamic design of a rotor system is to optimize the system in stability at the operating speed, unbalance response in the vicinity of the rotor critical speeds, and minimize the system weight considering economics. This paper deals with the optimum shape design of the rotor shaft to change the critical speeds under the constraints of the constant mass. As to the design procedures, the genetic algorithm was applied to find the optimum diameters of a rotor shaft so that the optimized rotor system can yield the critical speeds as far from the operating speed as possible. Genetic algorithm is a search algorithm based on the natural world, which states that the individual with the superior character creates the superior descendant because of having excellent adaptability, high survivability, and more crossing chance, and the natural genetics that repeatedly perform the process of reproduction, crossover, and mutation. The results show that the critical speeds of the rotor-bearing systems can be significantly improved by slight modification of the shaft diameters, even without increasing the total mass of a rotor system.

Keywords

Genetic algorithms optimum shape design rotor sliatt critical speed

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References

Choi, B.G. , Yang, B.S. , and Kim, W.C. , 1997, "Vibration optimum design of pump rotors using genetic algorithm," in Proceedings of the Fifth Asian International Conference on Fluid Machinery, Seoul , Korea, October 6-8, Vol. 1, pp. 85-92.

Davis, L. ed., 1991, Handbook of Genetic Algorithms, Van Nostrand Reinhold, New York.

Diewald, W. and Nordmann, R. , 1987, "Dynamic analysis of centrifugal pump rotors with fluid mechanical interactions," in Proceedings of the 11th Biennial Conference on Mechanical Vibrations and Noise, Boston, pp. 27-30.

Diewald, W. and Nordmann, R. , 1990, "Parameter optimization for the dynamics of rotating machinery ," in Proceedings of the 3rd International Conference on Rotor Dynamics, Lyon, France, pp. 51-55.

Doizelet, D. and Bondoux, D. , 1990, "Application of optimization techniques for hypercritical rotors," in Proceedings of the 3rd International Conference on Rotor Dynamics, Lyon, France, pp. 57-62.

Goldberg, D.E. , 1989, Genetic Algorithms in Search, Optimization & Machine Leaning, Addison Wesley, New York .

Nelson, H.D. and McVaugh, J.M. , 1976, "The dynamics of rotor-bearing systems using finite elements , "ASME Journal of Engineering for Industry 98(2), 71-75.

Rajan, M. , Rajan, S.D. , Nelson, H.D. , and Chen, W.J. , 1987, "Optimal placement of critical speeds in rotor bearing systems," ASME Journal of Vibration, Acoustics, Stress and Reliability in Design 109, 152-157.

Wang, J.H. and Shih, F.M. , 1990, "Improve the stability of rotor subjected to fluid leakage by optimum diameters design," ASME Journal of Vibration, Acoustics, Stress and Reliability in Design 112, 59-64.

Optimum Shape Design of Rotor Shafts Using Genetic Algorithm

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