Operational Deflection Shape


Operation Deflection Shape (ODS) analysis provides a direct visualization of system-level dynamic deflections at a given frequency. Frequencies can be selected in terms of mechanical orders (multiple of H1, rotor mechanical frequency) or electrical orders (multiple of fundamental electrical frequency). It is the analogue for excited structure of the exciting force Operational Force Shape (OFS).


This features allows electrical, mechanical and NVH engineers to interpret resonances during the virtual prototyping of electrical machines. Visualization of structural deflections can be done with operational forces. Far below resonance, exciting forces and deflections are in phase. At resonance, exciting forces and deflections are 180° out of phase.