An exact modeling method for dynamic analysis of multi-stepped rotor systems

다단 회전체계의 동적 해석을 위한 개선된 모델링 방법

  • 박종혁 (금오공과대학교 대학원) ;
  • 홍성욱 (금오공과대학교 기계공학부) ;
  • 이철 (금오공과대학교 대학원) ;
  • 김종욱 (금오공과대학교 대학원)
  • Published : 1998.04.01

Abstract

Although discretization methods such as the transfer matrix method (TMM) and the finite element method (FEM) have played an important role in the design or analysis of rotor-bearing systems, continuous system modeling and analysis are often desirable especially for sensitivity analysis or design. The present paper proposes a comprehensive modeling procedure to obtain exact solution of general rotor-bearing systems. The proposed method considers a Timoshenko beam model and makes use of complex coordinate in the formulation. The proposed method provides exact eigensolutions and frequency response functions (FRFS) of general multi-stepped rotor-bearing systems. The first numerical example compares the proposed method with FEM. The numerical study proves that the proposed method is very efficient and useful for the analysis of rotor-bearing systems.

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