Operational Deflection Shape

Description

Operation Deflection Shape (ODS) analysis provides a direct visualization of system-level dynamic deflections at a given speed and 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).

Both mechanical mesh and operational forces can be overlayed.

ODS is the analogue of the exciting force Operational Force Shape (OFS) for structure deflections.

Application

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.

Demonstration