Submitted by Kesio Palacio on Fri, 05/03/2010 - 09:46.
Dear Alaamohra,
We would say that you can perform cyclic loading in DIANA by:
1) static approach
In this case you specify your load (displacement, applied load, etc) in
your model data file as a static loading. As for instance:
'LOADS'
CASE 1
ELEMEN
/ 1 / FORCE -100.0
FACE KSI2
DIRECT 2
Then in the command file, you would specify an executable block like:
BEGIN EXECUTE
BEGIN LOAD
LOADNR=1
STEPS EXPLIC SIZES 0.1(1) -0.1(1) 0.1(1) -0.1(1)
END LOAD
BEGIN ITERAT
...........
END ITERAT
END EXECUTE
2) Dynamic analysis (time domain)
In the model data file you would define the following load input with time dependency,
see Section III – Dynamic Analysis in DIANA 9.4 Analysis Procedures manual for details:
'LOADS'
CASE 1
ELEMEN
/ 1 / FORCE -100.0
FACE KSI2
DIRECT 2
'TIMELO'
LOAD 1
TIMES 0.0 1.0 2.0 3.0 /
FACTOR 0.0 -1.0 1.0 -1.0 /
Then in the command file, you would specify an executable block like:
BEGIN EXECUTE
BEGIN TIME
BEGIN STEPS
..........
END STEPS
END TIME
BEGIN ITERAT
...........
END ITERAT
END EXECUTE
I hope it to be helpful,
Kesio Palacio
TNO DIANA support team
Submitted by Kesio Palacio on Mon, 15/03/2010 - 11:28.
Dear Salah,
If you use FX+ to model your project, then you have to transfer the model to MeshEditor in order to run the analysis of your model with DIANA. Also, when necessary, additional defnitions (as for instance material nonlinearities that were not possible to include in FX+) are finalized in the MeshEditor. Please, see "FX+ for DIANA" module of DIANA 9.4 in "Applications" manual for details.
To initiate the analysis choose the "Run" option from the Analysis menu of the MESH EDITOR. As an example, the steps below demonstrates how to define the analysis procedures for a nonlinear structural model.
▲ Analysis ► Run...
Status
Diana
Select analysis type
Type: ▲Structural nonlinear
Label: Smeared cracking of a notched beam
▲OK
Diana
Δ Smeared cracking of a notched beam ► Edit
Structural nonlinear Settings
▲Execute
▲Load steps ▲Settings
Execute load steps
Steps
◙Automatic step sizes ▲Settings
Automatic step sizes
Total step size 1.0
Maximum step size 0.1
Minimum step size 0.001
▲OK
Iteration
Maximum number of iterations 30
Convergence Norm
٧ Satisfy all specified norms
▲OK
▲Output
Device: ▲midas FX+ for Diana ▲ Properties…
Output Device Properties
Basename nonlinear
▲OK
Result
◙ User selection
▲Modify
Result Selection
▲DISPLA ▲Add
▲STRESS ▲Add
▲FORCE ▲Add
▲STRAIN►CRACK ▲Add
▲OK
▲OK
Diana
▲ Analysis ► Run...
Calculating
▲OK
Diana
▲ File ► Save Command File
Save Command File
File name: nonlinear
▲Save
▲ X
In the DIANA manual there are several examples that shows how to use the MeshEditor and the corresponding steps to set up the analysis procedures, please see Section "II. Examples" in "FX+ for DIANA" module of DIANA 9.4 "Applications" manual.
I hope it to be helpful,
Kesio Palacio
TNO DIANA support team
Dear Alaamohra,
We would say that you can perform cyclic loading in DIANA by:
1) static approach
In this case you specify your load (displacement, applied load, etc) in
your model data file as a static loading. As for instance:
'LOADS'
CASE 1
ELEMEN
/ 1 / FORCE -100.0
FACE KSI2
DIRECT 2
Then in the command file, you would specify an executable block like:
BEGIN EXECUTE
BEGIN LOAD
LOADNR=1
STEPS EXPLIC SIZES 0.1(1) -0.1(1) 0.1(1) -0.1(1)
END LOAD
BEGIN ITERAT
...........
END ITERAT
END EXECUTE
2) Dynamic analysis (time domain)
In the model data file you would define the following load input with time dependency,
see Section III – Dynamic Analysis in DIANA 9.4 Analysis Procedures manual for details:
'LOADS'
CASE 1
ELEMEN
/ 1 / FORCE -100.0
FACE KSI2
DIRECT 2
'TIMELO'
LOAD 1
TIMES 0.0 1.0 2.0 3.0 /
FACTOR 0.0 -1.0 1.0 -1.0 /
Then in the command file, you would specify an executable block like:
BEGIN EXECUTE
BEGIN TIME
BEGIN STEPS
..........
END STEPS
END TIME
BEGIN ITERAT
...........
END ITERAT
END EXECUTE
I hope it to be helpful,
Kesio Palacio
TNO DIANA support team
Dear Kesio
would you please advise on how to use these commands if I use FX+ for DIANA, Thanks
Salah
Dear Salah,
If you use FX+ to model your project, then you have to transfer the model to MeshEditor in order to run the analysis of your model with DIANA. Also, when necessary, additional defnitions (as for instance material nonlinearities that were not possible to include in FX+) are finalized in the MeshEditor. Please, see "FX+ for DIANA" module of DIANA 9.4 in "Applications" manual for details.
To initiate the analysis choose the "Run" option from the Analysis menu of the MESH EDITOR. As an example, the steps below demonstrates how to define the analysis procedures for a nonlinear structural model.
▲ Analysis ► Run...
Status
Diana
Select analysis type
Type: ▲Structural nonlinear
Label: Smeared cracking of a notched beam
▲OK
Diana
Δ Smeared cracking of a notched beam ► Edit
Structural nonlinear Settings
▲Execute
▲Load steps ▲Settings
Execute load steps
Steps
◙Automatic step sizes ▲Settings
Automatic step sizes
Total step size 1.0
Maximum step size 0.1
Minimum step size 0.001
▲OK
Iteration
Maximum number of iterations 30
Convergence Norm
٧ Satisfy all specified norms
▲OK
▲Output
Device: ▲midas FX+ for Diana ▲ Properties…
Output Device Properties
Basename nonlinear
▲OK
Result
◙ User selection
▲Modify
Result Selection
▲DISPLA ▲Add
▲STRESS ▲Add
▲FORCE ▲Add
▲STRAIN►CRACK ▲Add
▲OK
▲OK
Diana
▲ Analysis ► Run...
Calculating
▲OK
Diana
▲ File ► Save Command File
Save Command File
File name: nonlinear
▲Save
▲ X
In the DIANA manual there are several examples that shows how to use the MeshEditor and the corresponding steps to set up the analysis procedures, please see Section "II. Examples" in "FX+ for DIANA" module of DIANA 9.4 "Applications" manual.
I hope it to be helpful,
Kesio Palacio
TNO DIANA support team