Hysteretic damping

Hello,

I want to do modal analysis of a structure with viscoelastic material. The viscoelastic
material has a complex youngs modulus E= E (1+i*g), where g is the loss factor. In ANSYS, modal analysis ignores all
nonlinearity, so how can I perform modal analysis with viscoelastic material?

OR

How can I perform modal analysis in ANSYS considering hysteretic damping (complex Young’s
modulus  E= E (1+i*g) as input).

Cheers