Virtual Commissioning of Large Machines with COMSOL Multiphysics® Software

K. Kryniski [1], A. Trangard [1],
[1] ABB Corporate Research, Västerås, Sweden
Published in 2016

In addition to using advanced functions built-into the engine of the COMSOL Multiphysics® software, we integrate dynamic properties of rotating components that are measured or pre-computed. Here, it is shown how to integrate fluid-film characteristics and take advantage of post-processing and graphics to present the results to the customers using the Cloud. COMSOL® simulations of rotor-bearing systems are benchmarked for steady-state operations, transients and beyond. Stability thresholds are determined by solving the complex eigenvalues. However, for post-stability behavior non-linear fluid-film interactions need to be reconstructed from the pre-computed look-up tables. Demonstration of the concept is given through two applications involving motor-compressor and turbo-generator. The drivelines are representing multi-supported rotor-bearing systems. There is a strong demand to account for alignment changes and adjustments of the couplings and support stiffness.