# DOPTPRM, PNORM

Bulk Data Entry Specifies the value of the power (or penalty) $p$ , used in the Stress NORM Method for stress response calculation in Lattice Structure Optimization.

## Definitions

Parameter Values Description
PNORM Real ≥ 1.0

Default = 6.0

The Stress NORM Method is used to approximately calculate the maximum value of the stresses of all the elements included in a particular response. This is also scaled with the stress bounds specified for each element. Therefore, to minimize the maximum stresses in a particular element set, the resulting stress NORM value ( ${\sigma }_{\mathit{NORM}}$ ) is internally constrained to a value lower than 1.0.