Magnetic Damping of Vibrating Conducting Solids

Application ID: 12437

When a conductive solid material moves through a static magnetic field, an eddy current is induced. The current that flows through the conductor, which is itself moving through the magnetic field, induces a Lorentz force back on the solid. Therefore, a conductive solid that is vibrating in a static magnetic field will experience a structural damping. In this example, a cantilever beam is harmonically excited across a range of frequencies and placed in a strong magnetic field. The approach presented here assumes that the relative magnitude of the structural displacements are small, that the material has isotropic and linear properties, and that the magnetic field is static. The effect of the magnetic damping is computed.

This model example illustrates applications of this type that would nominally be built using the following products: