Services

Vibration measurement and analysis services for rotating equipment

Specialized in multichannel measurements of large machinery with sleeve bearings such as steam-, gas-, and hydro turbines and generators.
Measurements to smaller process machinery, like electric motors, pumps, fans and gears.
Quality control during revisions – measurements pre and post overhauls.
Acceptance testing for new machinery.
Vibration troubleshooting.
Third party assessments.
Balancing.
Operational Deflection Shape (ODS) measurements.
Modal analysis.
Consultancy and training of periodical condition monitoring
Vibrations measurements for static structures such as, piping, valves and boilers.

Operational Deflection Shape (ODS) measurement is a troubleshooting method revealing an abnormal deformation pattern of a vibrating structure.
Abnormality is typically caused by elasticity (=lack of stiffness), damage (= for instance crack, loosen foundation bolt) or installation errors (=for instance loose mounting bolt).
Measurement is performed during normal, stable operation where the excitation forces are caused by the machine itself.
Analysis result is presented as an animation. In order to reach necessary demonstrative level, the amplitudes are highly exaggerated and frequency is slowed down in animation.

Experimental Modal Analysis is a testing method for describing and modelling the dynamic behavior of a structure.
Structure is excited with measured artificial excitation and vibration responses are measured.
By using measured FRFs (Frequency Response Function) the natural frequencies and associated modal shapes and damping can be defined.
In addition to troubleshooting this method is used in product development where FEM results are verified with real structures.