Permas Solver Interface

The HyperMesh Permas interface enables you to:

Read in a Permas .dat file
Read and write .gz files
Specify linear, nonlinear static and frequency analyses
Preview and edit Permas cards
Output a HyperView .h3d file for post-processing

HyperMesh supports Permas .dat files for direct import. Permas .uci command files are supported from version 2019.1.

The Permas interface supports names up to 40 characters in length.

MPC ID Pools

The HyperMesh Permas interface allows multipoint constraints (MPC) to use the same ID as other elements, such as beams, shells or solids within HyperMesh. In other words, selected elements and MPCs can use different “ID pools.”

Some restrictions apply. To explain, a list of MPC types and which HyperMesh entity they are mapped to is provided:

Table 1.
HyperMesh entity	MPC type
rigid	ASSIGN
	RIGID
	SAME
	JOIN
rbe3	WLSCON
	IQUAD
	ITRIA
equation	GENERAL
group	ISURFACE
	WLSSURFACE
	WLDSURFACE

While rigid and rbe3 elements use the same ID pool in HyperMesh, equations and groups have separate ones. Thus, it is possible to create duplicate IDs for MPCs as well. To resolve this, during export, a solver option is available in the Export tab to renumber MPCs if duplicate IDs are present. This option will check for the highest rigid/rbe3 ID and renumber equation entities accordingly. Groups are not included in the renumbering functionality as contact IDs would be affected by renumbering.

Due to the mapping scheme explained above, it is possible to import MPCs with duplicate IDs; for example, MPC JOIN and GENERAL equation and groups although Permas does not allow it.

Before working with your model, ensure that the Permas user profile is loaded. The user profile provides a customized HyperMesh environment for working with Permas.