Modal Analysis

High vibration levels can be measured on rotating assets as a result of structural resonances.  If the resonant frequency of a structure coincides with a vibration frequency (i.e. running speed, harmonics of running speed, gear meshing frequencies, etc..) then this can significantly increase the level of vibration being experienced and can lead to reduced asset life or even damage to the supporting structure.

Asset Condition Monitoring Ltd are able to establish if such a resonance is present and responsible for high vibration levels.  Once a resonance has been identified, the next step is to change the frequency of the resonance by altering the stiffness characteristics of the assembly and/or reducing the amplitude of the resonance by introducing damping.  In order to understand the dynamic flexibility of the asset/structure at resonance a Modal Analysis is required.  This involves using dedicated modal software to create a 3D model of the asset/structure and then collecting vibration amplitude & phase measurements in all 3 orthogonal axes at each co-ordinate point created in the 3D model.

Once the data has been collected a 3D animation of the structural dynamic flexibility can be viewed, enabling a recommendation to be made that will alter the resonant characteristics so that it no longer amplifies the vibration source - resulting in a smooth operating machine.