Abstract
The increasing use of high-speed machinery leads to a growing demand for efficient balancing methods for flexible rotors. Conventional balancing methods are costly and time-consuming since they require multiple trial runs. For this reason, recent research focuses on model-based balancing methods, which substitute measurements with simulations. This work presents and examines a model-based modal balancing method, which utilizes the Numerical Assembly Technique (NAT) for the in situ balancing of warped rotors with flexible behaviour. NAT is a successive modification of discrete–continuous modelling that leads to analytical harmonic solutions and is very computationally efficient. In this version of NAT, internal damping is also included with a viscoelastic material model using fractional time derivatives. The modal balancing procedure is adapted to handle measurements outside of the critical speeds and the effect of the pre-bend on the rotor. The accuracy of the simulations is shown by comparing measured mode shapes and eigenvalues with values calculated with NAT. Furthermore, the first two modes of a rotor test bed are successfully balanced without trial runs.
Original language | English |
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Article number | 1073 |
Journal | Machines |
Volume | 11 |
Issue number | 12 |
DOIs | |
Publication status | Published - 7 Dec 2023 |
Keywords
- modal analysis
- model-based balancing
- Numerical Assembly Technique
- rotor dynamics
ASJC Scopus subject areas
- Computer Science (miscellaneous)
- Mechanical Engineering
- Control and Optimization
- Electrical and Electronic Engineering
- Control and Systems Engineering
- Industrial and Manufacturing Engineering