HyperMesh and BatchMesher

Loadsteps Panel

Loadsteps Panel

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Loadsteps Panel

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Location:   Analysis page

 

The Loadsteps panel is available only when the Nastran or OptiStruct user profile is loaded.  It is used to generate Nastran and OptiStruct loadstep definitions. The panel creates HyperMesh loadstep entities. These loadstep entities directly correspond to Nastran and OptiStruct loadstep definitions.

The Loadsteps panel allows explicit selection of bulk data information for use in a loadstep. A type selector allows the user to define the type of analysis to be performed in a loadstep. Depending on the user profile, different analysis types are available. Each analysis type presents the user with a subset of selectors that are relevant to that type of analysis. A "generic" analysis type is also available which presents all selectors to the user.

 

Panel Usage

The panel layout is different depending on the solver profile loaded; in general, OptiStruct offers more inputs than Nastran.

hmtoggle_arrow1Available References for Nastran

Reference:

Function:

SPC (constraints)

Select a loadcollector with an SPCADD card image or a loadcollector with no card image containing SPC entries.

LOAD (static loads)

Select a loadcollector with a LOAD, GRAV or RFORCE card image or a loadcollector with no card image containing FORCE, MOMENT, PLOAD, PLOAD2, PLOAD4, and SPCD entries.

(If "LOADTEMP = shareid" is set in the OptiStruct configuration file, then a loadcollector with a TEMPD card image or a loadcollector with no card image containing TEMP entries may also be selected here).

MPC (multi-point constraints)

Select a loadcollector with an MPCADD card image or a loadcollector with no card image containing MPC entries.

SUPPORT1 (fictitious supports)

Select a loadcollector with no card image containing SUPORT1 entries.

NLPARM (non-linear parameters)

Select a loadcollector with an NLPARM card image.

METHOD  (Eigenvalue extraction data)

Select a loadcollector with an EIGRL card image

FREQ (frequency range)

Select a loadcollector with a FREQ, FREQ1, FREQ2, FREQ3, FREQ4 or FREQ5 card image

SDAMPING (damping)

Select a loadcollector with a TABDMP1

DLOAD (dynamic loads)

Select a loadcollector with a DLOAD, TLOAD1, TLOAD2, RLOAD1, or RLOAD2 card image

TSTEP (time step)

Select a loadcollector with a TSTEP card image.

For the OptiStruct user profile, you also need to choose TIME or FOURIER for TSTEP, indicating that a true transient or a fourier transform transient analysis is to be performed

STATSUB (static sub-case)

Select a linear static loadstep definition.

TEMP (thermal loading)

Select a loadcollector with a TEMPD card image or a loadcollector with no card image containing TEMP entries.

(If "LOADTEMP = shareid" is set in the OptiStruct configuration file then a loadcollector with a TEMPD card image or a loadcollector with no card image containing TEMP entries should be selected by the LOAD selector and not by the TEMP selector).

LOADSET (static load sequences)

Select a loadcollector with an LSEQ card image.

 
hmtoggle_arrow1Available References for OptiStruct

Reference:

Function:

SPC (constraints)

Select a loadcollector with an SPCADD card image or a loadcollector with no card image containing SPC entries.

LOAD (static loads)

Select a loadcollector with a LOAD, GRAV or RFORCE card image or a loadcollector with no card image containing FORCE, MOMENT, PLOAD, PLOAD2, PLOAD4, and SPCD entries.

(If "LOADTEMP = shareid" is set in the OptiStruct configuration file, then a loadcollector with a TEMPD card image or a loadcollector with no card image containing TEMP entries may also be selected here).

MPC (multi-point constraints)

Select a loadcollector with an MPCADD card image or a loadcollector with no card image containing MPC entries.

SUPPORT1 (fictitious supports)

Select a loadcollector with no card image containing SUPORT1 entries.

NLPARM (non-linear parameters)

Select a loadcollector with an NLPARM card image.

METHOD  (Eigenvalue extraction data)

Select a loadcollector with an EIGRL card image

FREQ (frequency range)

Select a loadcollector with a FREQ, FREQ1, FREQ2, FREQ3, FREQ4 or FREQ5 card image

SDAMPING (damping)

Select a loadcollector with a TABDMP1

DLOAD (dynamic loads)

Select a loadcollector with a DLOAD, TLOAD1, TLOAD2, RLOAD1, or RLOAD2 card image

TSTEP (time step)

Select a loadcollector with a TSTEP card image.

For the OptiStruct user profile, you also need to choose TIME or FOURIER for TSTEP, indicating that a true transient or a fourier transform transient analysis is to be performed

STATSUB (static sub-case)

Select a linear static loadstep definition.

TEMP (thermal loading)

Select a loadcollector with a TEMPD card image or a loadcollector with no card image containing TEMP entries.

(If "LOADTEMP = shareid" is set in the OptiStruct configuration file then a loadcollector with a TEMPD card image or a loadcollector with no card image containing TEMP entries should be selected by the LOAD selector and not by the TEMP selector).

IC (initial conditions)

Select a loadcollector with TIC card image.

MBSIM (multi-body dynamics simulation)

Select a loadcollector with an MBLIN, MBSIM or MBSEQ card image.

MLOAD (multi-body dynamics loads)

Select a loadcollector with an MLOAD card image or a loadcollector with no card image that contains MBFRC, MBFRCC, MBMNT, or MBMNTC entries.

MOTION (multi-body dynamics motions)

Select a loadcollector with a MOTION card image or a loadcollector with no card image that contains MOTNG or MOTNGC entries.

INVEL (multi-body dynamics initial velocity)

Select a loadcollector with an INVELB card image.

CMSMETH (component mode synthesis)

Select a loadcollector with a CMSMETH card image.

 

 

Subpanels and Inputs

There are no subpanels on the Loadsteps panel. All inputs and button commands are located on the main panel.

 

Panel Inputs

Input

Action

name =

Click this button to display a list of loadsteps, or type the name of a new loadstep into the text box.

type: (switch)

Use this switch to pick the loadstep type, such as linear static or heat transfer.  The options available depend on the current user profile.

 

SPC

Select a loadcollector with an SPCADD card image or a loadcollector with no card image containing SPC entries.

LOAD

Select a loadcollector with a LOAD, GRAV or RFORCE card image or a loadcollector with no card image containing FORCE, MOMENT, PLOAD, PLOAD2, PLOAD4, and SPCD entries.

(If "LOADTEMP = shareid" is set in the OptiStruct configuration file, then a loadcollector with a TEMPD card image or a loadcollector with no card image containing TEMP entries may also be selected here).

MPC

Select a loadcollector with an MPCADD card image or a loadcollector with no card image containing MPC entries.

SUPPORT1

Select a loadcollector with no card image containing SUPORT1 entries.

NLPARM

Select a loadcollector with an NLPARM card image.

METHOD

Select a loadcollector with an EIGRL card image

FREQ

Select a loadcollector with a FREQ, FREQ1, FREQ2, FREQ3, FREQ4 or FREQ5 card image

SDAMPING

Select a loadcollector with a TABDMP1

DLOAD

Select a loadcollector with a DLOAD, TLOAD1, TLOAD2, RLOAD1, or RLOAD2 card image

TSTEP

Select a loadcollector with a TSTEP card image.

For the OptiStruct user profile, you also need to choose TIME or FOURIER for TSTEP, indicating that a true transient or a fourier transform transient analysis is to be performed

STATSUB

Select a linear static loadstep definition.

TEMP

Select a loadcollector with a TEMPD card image or a loadcollector with no card image containing TEMP entries.

(If "LOADTEMP = shareid" is set in the OptiStruct configuration file then a loadcollector with a TEMPD card image or a loadcollector with no card image containing TEMP entries should be selected by the LOAD selector and not by the TEMP selector).

LOADSET

Select a loadcollector with an LSEQ card image.

IC

Select a loadcollector with TIC card image.

MBSIM

Select a loadcollector with an MBLIN, MBSIM or MBSEQ card image.

MLOAD

Select a loadcollector with an MLOAD card image or a loadcollector with no card image that contains MBFRC, MBFRCC, MBMNT, or MBMNTC entries.

MOTION

Select a loadcollector with a MOTION card image or a loadcollector with no card image that contains MOTNG or MOTNGC entries.

INVEL

Select a loadcollector with an INVELB card image.

CMSMETH

Select a loadcollector with a CMSMETH card image.

Other input data is automatically generated (the SUBCASE header) or may be added to the loadstep definition through the edit function (output requests, RESVEC).

 

Command Buttons

The following action buttons appear:

Button

Action

next

Advance to the next page of inputs.  This button becomes inactive if you are already on the final page of inputs.

prev

Step back to the previous page of inputs.  This button becomes inactive if you are already on the first page of inputs.

create

Create a new loadstep using the specified references.

edit

Open the timestep's card image in edit mode.

update

Modify the currently selected loadstep to use the references you have specified.

review

Opens a list of existing loadsteps so that

return

Exit the panel.

 

 

See Also:

An Alphabetical List of HyperMesh Panels

Load Steps panel for user profiles other than OptiStruct or Nastran