Manatee V2 default models assume a weak coupling between electromagnetic and structural models.
The weak coupling is valid when rotor and stator radial displacements are much smaller than the effective airgap width, which is generally the case, especially for surface PM machines. As an example, a displacement of 1 micrometer of 1 m surface vibrating at 1 kHz can reach 100 dB: there is no need for large displacements to produce a high noise level.
In case of strong eccentricity levels, non linearities effects can occur due to the combination of Unbalanced Magnetic Pull and centrifugal forces, requiring iterations between magnetic and structural models. This effect can be quantified within a consulting project.