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부가질량과 Nonhomogeneous 베어링 지지 조건이 고려된 로터 킷의 진동해석 모델
정종탁(JongTak Jeong),서정석(JungSeok Seo),송오섭(Ohseop Song) 한국소음진동공학회 2018 한국소음진동공학회 논문집 Vol.28 No.4
In this study, a refined structural model of a complex rotating shaft system with nonuniform cross-section, disks, and supported by several bearings are established via Hamilton’s variational principle. Timoshenko beam theory is adopted to incorporate transverse shear and the rotary inertia effect. It is assumed that the shaft spins with a constant speed about its spin axis and is subjected to a conservative axial force. Elastic coupling between vertical and lateral bending motion is caused by Coriolis acceleration. The implications of the gyroscopic effect, additional masses, axial force, and nonhomogeneous boundary conditions (reflecting bearing stiffness and damping) are revealed and analytical results are compared with those obtained from the ANSYS finite element analysis. The prediction model established in this study could be used for the preliminary design of a complicated rotating system.