擬規準座標変換法による回転軸の曲げ・軸方向連成振動解析 : 複素固有値解析(機械力学,計測,自動制御)

概要

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We developed a computer program to analyze the coupled vibration of lateral and axial vibrations in rotating machines by using the quasi-modal transformation method. This method is based on the same concept as the well-known modal synthesis method. The method provides a reduced model of an actual system using a combination of eigen modes from an inner system restricted at the bearings and deflection modes created when a load is inputted at the boundary points. Lateral vibration and axial vibration models were reduced using this method, and the reduced models were then combined at the bearing boundary points. We can rapidly obtain accurate numerical analysis results of coupled vibration of rotating machines, like turbine-generator sets, by using this program. We showed the practical applications of our method by comparing the numerically examples with a non-reduced model. We also showed that the natural frequencies of axial modes decrease because of coupling in the lateral mode.
2006-10-25