Search found 25 matches

by lorcancon
Mon Jul 28, 2014 7:13 am
Forum: OpenSees.exe Users
Topic: Parameter command for response variables.
Replies: 3
Views: 1106

Re: Parameter command for response variables.

Apologies, there is an error in my last comment. The command relating parameters to nodal displcement should be:

parameter $paramtag node $nodetag disp $DOF
by lorcancon
Thu Jul 24, 2014 1:03 am
Forum: OpenSees.exe Users
Topic: Write variables to a file
Replies: 2
Views: 810

Re: Write variables to a file

Nick,

Thanks a lot. Worked perfectly.

Lorcan.
by lorcancon
Wed Jul 23, 2014 2:52 am
Forum: OpenSees.exe Users
Topic: Write variables to a file
Replies: 2
Views: 810

Write variables to a file

All, Is it possible to write variables to a file? for example, I have a numeric variable "X" which which changes through each loop of a simulation. I want to add the value of "X" to a file called "data" on each loop. I've tried the following command: print -file data.out $X but on each loop it just ...
by lorcancon
Wed Jul 23, 2014 2:11 am
Forum: OpenSees.exe Users
Topic: updateParameter Problem
Replies: 2
Views: 866

Re: updateParameter Problem

The final input used in "Parameter" and "addToParameter" should specify what is the parameter is being assigned to. If you change the final command from "Parameter_E" to just "E", it should work. However, the setParameter() class may not be set up for zero length elements or uniaxial materials. Hope...
by lorcancon
Wed Jul 23, 2014 12:55 am
Forum: OpenSees.exe Users
Topic: Parameter command for response variables.
Replies: 3
Views: 1106

Re: Parameter command for response variables.

Frank, Thanks for your response. I've been looking through the source code and it's easy to see the set parameter() commands for each class for class properties (area, stiffness, geometric properties etc.). However, the set parameter() commands for class responses (nodal displacements, element loads...
by lorcancon
Tue Jul 22, 2014 3:40 am
Forum: OpenSees.exe Users
Topic: Parameter command for response variables.
Replies: 3
Views: 1106

Parameter command for response variables.

All, I have managed to assign nodal displacements to a parameter using the following command: parameter $paramtag node $nodetag disp $DOF However, I was wondering what other response variables can be assigned to parameters, and what their commands are. For example, how does one assign an internal el...
by lorcancon
Tue Jul 22, 2014 3:18 am
Forum: Reliability Analysis
Topic: Parameter command for response variables.
Replies: 0
Views: 1537

Parameter command for response variables.

Mike, I have managed to assign nodal displacements to a parameter using the following command: parameter $paramtag node $nodetag disp $DOF However, I was wondering what other response variables can be assigned to parameters, and what their commands are. For example, how does one assign an internal e...
by lorcancon
Tue Jul 22, 2014 3:11 am
Forum: OpenSees.exe Users
Topic: Parameter command for loads
Replies: 1
Views: 632

Re: Parameter command for loads

After a brief look at the source code. It appears that element loading cannot be applied as a parameter in 3D, for any element type. Will this ever be a possibility?

Thanks,
Lorcan.
by lorcancon
Mon Jul 14, 2014 8:06 am
Forum: OpenSees.exe Users
Topic: Parameter command for loads
Replies: 1
Views: 632

Parameter command for loads

Hi all, I was wondering about the parameter command for assigning random variables to loads. It seems that some of the commands to assign load parameters do not apply to certain elements in 3D. For example, the element line load parameter does not seem to relate to linear elastic elements in 3D. Wou...
by lorcancon
Mon Jul 14, 2014 7:35 am
Forum: Reliability Analysis
Topic: Parameter command for loads
Replies: 8
Views: 4482

Re: Parameter command for loads

Mike,

It seems I can get the linear element load working for 2D but not for 3D. I am using elastic elements in 3D. Should it be possible use the parameter command for these elements?

I still cannot make sense of the parameter command for element point loads.

Regards,
Lorcan.
by lorcancon
Mon Jul 14, 2014 3:51 am
Forum: Reliability Analysis
Topic: Parameter command for loads
Replies: 8
Views: 4482

Re: Parameter command for loads

Mike,

In relation to the parameter command for an element point load, I notice that in one of your past lectures you specified that the last argument can be Px, Py or xOverL. Surely you need to specify all of these variables for an element line load?

Thanks,
Lorcan.
by lorcancon
Fri Jul 11, 2014 6:11 am
Forum: Reliability Analysis
Topic: Parameter command for loads
Replies: 8
Views: 4482

Re: Parameter command for loads

Apologies, the first error is as follows:

Parameter::Parameter 80 -- error encountered while attempting to identify parameter

Regards,
Lorcan.
by lorcancon
Fri Jul 11, 2014 5:18 am
Forum: Reliability Analysis
Topic: Parameter command for loads
Replies: 8
Views: 4482

Parameter command for loads

Mike, I've been trying to use the parameter command for element loads and I get the following error when I run a FORM analysis: SearchWithStepSizeAndStepDirection::gradientStandardNormal() - the norm of the gradient is zero. The commands I'm using are as follows: parameter $Paramtag randomVariable $...
by lorcancon
Wed Jul 09, 2014 6:30 am
Forum: OpenSees.exe Users
Topic: Output data
Replies: 14
Views: 4455

Re: Output data

Nick,

Thanks again for your quick reply. I'll give this a go.

Lorcan.
by lorcancon
Wed Jul 09, 2014 5:32 am
Forum: OpenSees.exe Users
Topic: Output data
Replies: 14
Views: 4455

Re: Output data

Nick, I am working with a large model with a lot of elasticBeamColumn elements and I want to create a loop which will automatically apply self weight as a line load for all elements. Something like the following: foreach elem [getEleTags] { set area [lindex [eleResponse $elem] 4]; # Here we need to ...