1-5 Material model real constant number (N) 6-15 Spring elastic constant (K1) 16-25 Spring plastic constant (K2) 26-35 Yield force (FY) 36-45 Ductility factor (DUCT) 46-55 Spring Mass (M) 56-65 Raleigh damping stiff. coefnt (RALFA) 66-75 Raleigh damping mass coefnt (RBETA)