Identification of frame dynamics of vertically oriented high-speed steam generator using model update procedure for reduced-order model

Abstract

Active Magnetic Bearing (AMB) systems are common in high-speed rotating machinery. Bearing control system input is the relative displacement data measured between the sensor and the measurement surface. In case of frame resonance, controller may create a feedback loop which may amplify the frame vibration modes. The frame vibration dynamics of 1 MW steam generator with AMB-support is studied. Vibration mode identification using FE-based model are discussed. Model-order reduction techniques are utilized to solve a large-scale numerical problem. The paper shows an update procedure for a computationally efficient reduced-order model that can be used for identifying measured unclear vibration modes.