LOAD: Defining Loading Conditions

LOAD: Defining Loading Conditions

• Selecting the *LOAD sub-keyword
• Visualisation

A range of different loading types can be defined in Ansys LS-DYNA

All *LOAD sub-keywords are editable within PRIMER.

Most * LOAD cards can be edited only with the generic "Keyword" editor.

The other commands ( COPY, DELETE, ...) function in the standard fashion described in Standard Keyword Top Level Menu Options.

This shows an example of the Keyword editor for * LOAD_NODE . The _POINT variant has been chosen here.

Specific editing panels exist for *LOAD_MOVING_PRESSURE and *LOAD_THERMAL_VARIABLE_SHELL due to the nature of those keywords. These cards are similar. They both allow the user to add any number of additional lines of data per card. The *LOAD_MOVING_PRESSURE card is shown here.

Additional rows of data can be added by clicking on the Add a data line button.

Visualising *LOAD items

*LOAD items are not displayed by default, but can be selected for display and labelling in the ENTity Viewing panel.

Only *LOAD_NODE symbols are drawn explicitly as arrows acting in the direction of the load/moment. Note that load symbols can be distinguished from * INITIAL_VELOCITY ones both by colour and because loads point to a node whereas velocities point away from it. This example shows a force in X acting on Node 10343, and a moment about the YY axis acting on node 10335.

Other * LOAD sub-keywords are visualised only in terms of the sets, segments, elements or nodes upon which they act by turning on these additional items in ENTity Viewing. Labels are generated correctly for all sub-types.