Loadsteps Panel
Use the Loadsteps panel to create Nastran and OptiStruct loadstep entities, which 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 you to define the type of analysis to be performed in a loadstep. Depending on the solver interface, different analysis types are available. Each analysis type presents 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.
Available 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 solver interface, 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. |
Available 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. |
Panel Options
| Option | Action |
|---|---|
| name = | Specify a name for the new loadstep, or click to display a list of loadsteps, . |
| type: (switch) | Select the loadstep type, such as linear static or heat transfer. |
| 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 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. |
Command Buttons
| 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 | Open a list of existing loadsteps so that |
| return | Exit the panel. |