Rotating equipments are critical for many industries in our society. Some examples are turbines, electric generators, pumps, compressors, electric motors and drives. Almost all rotating machinery has one general task; to efficiently transfer power to a rotating shaft induced by water, steam or gas flow, mechanical force and magnetic fields or vice versa. However, in all rotating machinery loss of energy occurs. As in all mechanical systems, dissipative mechanisms convert the mechanical energy to thermal energy. In addition to dissipation, there are other forms of energy leakage in rotating machinery, transforming the rotating energy to other forms of mechanical energy, which results in vibration of the rotor system, the supporting structure and interactions with electromagnetic field and surrounding fluids. Energy is expensive and an important engineering problem is therefore to reduce the leakage, both in the form of dissipation and vibrations. Vibrations also lead to other problems in the mechanical equipment, such as noise, stress, fatigue, friction, wear, impacts and damage.
The effects of vibrations in rotating equipment are both of economic and environmental interest to control. Undesirable operations, downtime and failure of rotating equipment are one of the largest business risks for an operator. In harsh environment and on sea-bed installations, where the possibilities to maintain and physical access the equipment decreases, the risks becomes larger. We assist our clients to mitigate from vibration related risks in rotating equipment.
In order to improve our knowledge, tools and methods for solving rotordynamical problems, we have decided to perform a few master thesis projects. The projects will be carried out in collaboration with our clients, which makes it possible for the student to get a feeling for how it is working as consultant at ÅF. Please contact us for a full description:
- Operational modal analysis on a rotating machine
- Solid 3D finite element modelling and analysis of rotordynamical problems
- Transient simulation of a non-linear rotor-bearing system
If you have questions or would like to apply for the master thesis please contact:
Martin Karlsson
Expert, Ph.D. Mechanical Engineering
ÅF, Sound & Vibration
Tfn +46 10 505 35 90
Very welcome with your application!