Header menu link for other important links
X
Multiobjective optimization of rotor-bearing systems with an investigation of goal programming approach
Published in SAGE Publications Ltd
2019
Volume: 233
   
Issue: 12
Pages: 4270 - 4287
Abstract
With ever-increasing demand for higher flexibility and higher speeds of operation of high-speed rotating machinery, study of their unbalance responses and stability are of paramount importance. For easier maintenance and transport, weight of such systems is also a critical criterion. In the present study, optimum design parameters of a rotor-bearing system are found by employing multiple multiobjective optimization schemes for simultaneously minimizing unbalance response, maximizing stability limit speed, and minimizing system weight. This is an improvement over previous systems where simple equal weighting of multiple objective functions is carried out to reduce computational challenges. The shaft is assumed to be hollow and modeled as an assembly of 10 two-noded Euler–Bernoulli beam elements with an isotropic disc mounted on it. Genetic algorithm and its multiobjective variant (NSGA-II) are used to find the global optima. The technique of goal programming is identified as a more practical and less computationally challenging alternative to Pareto-based optimization, while yielding an approximate optimum. Complexities arising due to gyroscopic effects and dynamic nature of anisotropic fluid film bearings are also considered, along with practical upper and lower bounds of design variables and maximum von Mises stress developed in the system as constraints. © IMechE 2018.
About the journal
JournalData powered by TypesetProceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
PublisherData powered by TypesetSAGE Publications Ltd
ISSN09544062
Open AccessNo
Concepts (13)
  •  related image
    ANISOTROPIC FLUIDS
  •  related image
    Genetic algorithms
  •  related image
    Light velocity
  •  related image
    Linear programming
  •  related image
    Machinery
  •  related image
    System stability
  •  related image
    Goal programming
  •  related image
    NADIR POINT
  •  related image
    ROTOR-BEARING SYSTEM
  •  related image
    STABILITY LIMIT
  •  related image
    UNBALANCE RESPONSE
  •  related image
    WEIGHT
  •  related image
    Multiobjective optimization