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Validation and Simplification of Bearing Models for Simulation of Vertical Rotors

Published: 3 March 2022

The Swedish Hydropower Centre, SVC was founded in 2005 and is from 2018 a centre of excellence. Through research and development of technology, systems, methods and issues around hydropower and dams, we contribute to a renewable energy system.

Link to SVC: http://svc.nu

 

New project where the employment of a doctoral student is ongoing:

Over the years, we have developed new models for rotor dynamics and, above all, worked with the bearing issues. Today we have developed transient models that will be able to handle the start-up process. However, we have seen analytically and from simulations that not all eigenfrequencies should be included when the rotor is vertical. For a horizontal rotor, we get a full stiffness matrix while a vertical rotor only seems to get half of the terms. This will imply that several eigenfrequencies given by normal rotor calculations will not exist. We have also not fully verified that the eigenfrequencies are correct with our bearing models. With the new test rig in Älvkarleby, we have good opportunities to validate the models. The doctoral student's task is to validate previous models and develop new ones for other layer types.

PhD Student: ?

Supervisor: Jan-Olov Aidanpää https://www.ltu.se/staff/j/joa-1.9863