HyperWorks 12.0 Release Notes

Hybrid Damping for Direct Dynamic Analysis
Hybrid damping is now available in RADIOSS.
This is a means of applying modal damping in a direct frequency response or direct transient response
analysis.
This is recommended mainly for residual models, where a large part of the structure is represented by
external super elements. This is because of the computational expense of this feature.
It is activated via the HYBDAMP subcase information entry, which in turn references a HYBDAMP Bulk
Data entry.
Additionally, the DMIGMOD entry has been expanded to allow hybrid damping to be defined for
external super elements only (HYBDAMP will apply damping to both residual structure and external
super elements).
Frequency Dependent Spring Property
A frequency dependent spring property is now available in RADIOSS.
Similar to the existing PBUSHT frequency dependent bushing property definition, a PELAST frequency
dependent spring property definition has been added. It may be referenced by spring elements
(CELAS1, CELAS3).
Speed of the Modal Frequency Response Analysis Solution
The speed of the modal frequency response analysis solution has been dramatically increased for
problems that have a large number of modes and structural damping and/or viscous damping.
Results for a SET of GRID Can be Requested from a CMS Super Element
During a residual run, the results from a SET of ASET and interior GRID can be requested. In the past
only NODMIG or DMIGALL were allowed on the OUTPUT command. Now DMIGSET is supported.
The Fluid-Structure Coupling Matrix Can Now be Written to the .pch File.
The fluid-structure coupling (Area) matrix can now be output to the .pch file in DMGI format using the
PARAM,AGGPCH,YES command.
SPCD Data Created for CMS Super Elements for Each Mode During Eigenvalue Analysis
A .spcd file is created during an eigenvalue analysis of a model that contains CMS Super Elements.
This file contains SPCD data for each ASET GRID and SPOINT for each mode. This SPCD data can be
used in a following run to recover the internal results for a specific mode.
PFMODE and PFPANEL Can Write Results to the .h3d, .pch, or Both Files
The results from PFMODE and PFPANEL can be written out to the .h3d file, the .pch file, or both files.
PFMODE Output Can Now be Determined by Displacement, Velocity, or Acceleration
The option RTYPE has been added to the PFMODE data in order to specify DISP, VELO, or ACCE to
determine the output of the modal participation results.