소음진동 (Journal of KSNVE)
- 제8권6호
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- Pages.1069-1077
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- 1998
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- 1226-0924(pISSN)
터보압축기의 진동 특성에 관한 해석적 연구
An Analytical Investigation on Vibrational Characteristics of Turbo Compressor
초록
A dynamic model of turbo compressor having helical gear pairs is developed. The model accounts for the shaft and bearing flexibilities, gyroscopic effects and the force couplings among the transverse, torsion. and axial motions due to gearings. For the mode analysis of turbo compressor, a transfer matrix method is used. The excitation sources caused by the mass unbalances of the rotors and misalignment of the shafts, the transmitted errors of the gearings. and the vane passing frequencies of the Impeller are studied qualitatively. By introducing the perturbation method, the generated forcing frequencies are defined and devided into three groups. With the field data, two critical speeds are analytically found and the corresponding modal characteristics are examined.
키워드