Search found 30 matches
- Fri Apr 25, 2014 7:08 am
- Forum: OpenSees.exe Users
- Topic: Elastic nonlinear
- Replies: 1
- Views: 1881
Elastic nonlinear
Hi, I want to find some material which is related to elastic nonlinear . I mean ,for example , when this elastic nonlinear material is set to a truss element ,it behaves like an element set to Material Steel02 when under pressure, and behaves like element set to Elastic Uniaxial Material . I am wond...
- Thu Apr 24, 2014 7:44 am
- Forum: OpenSees.exe Users
- Topic: StrainStress recorder for truss
- Replies: 2
- Views: 3435
StrainStress recorder for truss
How to record the StrainStress of the truss element when I do the dynamic analysis of a space structure in Opensees ? I know there is a recorder command of element about stressStrain, but it is for section fiber ,such as the command :recorder Element -file Element1.out -time -ele 1 3 section 1 fiber...
- Mon Apr 21, 2014 3:54 am
- Forum: OpenSees.exe Users
- Topic: truss buckling
- Replies: 0
- Views: 1459
truss buckling
I use the corotTruss element in a large span space structure in opensees. How can I deal with the buckling in corotTruss element when I do some dynamic analysis. Is there any other element or material in opensees related to this problem. Also, I want to know which papers I need to read in order to u...
- Fri Mar 28, 2014 12:37 am
- Forum: OpenSees.exe Users
- Topic: analyze time
- Replies: 1
- Views: 1859
analyze time
how to get the start time and the terminal time of the transient analyze.i want to know how much time it costs to do the transient analyze. thanks a lot.
- Sun Feb 23, 2014 1:06 am
- Forum: OpenSees.exe Users
- Topic: initial velocity at nodes
- Replies: 0
- Views: 1496
initial velocity at nodes
we use "pattern UniformExcitation $patternTag $dir -accel (TimeSeriesType arguments) <-vel0 $ver0>" commands to define the initial velocity at nodes, and this command set the velocity to all the nodes of the structure . I want to set the velocity to some of the nodes ,not to all of the nod...
- Wed Nov 27, 2013 8:05 am
- Forum: OpenSees.exe Users
- Topic: geometric nonlinearity
- Replies: 1
- Views: 2014
geometric nonlinearity
I want to do some analysis about geometric nonlinearity in a structure built with truss element, however I get the linear result . so how to solve this problem. when I use the corotTruss element, I get the zero result , in this problem, an earthquake load is applied to the whole model. Is there any ...
- Fri Nov 22, 2013 7:02 am
- Forum: OpenSees.exe Users
- Topic: how to add nodal load
- Replies: 1
- Views: 1813
how to add nodal load
there is a file named "Pext.txt" which contains the nodal load I want to apply, and the load varies according to the time. my problem is how to add this load to a node which we can name it "node 2",and we suppose there is only one DOF at the node. please write the commands if pos...
Truss.cpp
1.Truss::addInertiaLoadToUnbalance(const Vector &accel)
2.Truss::getResistingForceIncInertia()
what is the relationship of the two classes above in Truss.cpp. and what result will get after invoke the two classes. thanks.
2.Truss::getResistingForceIncInertia()
what is the relationship of the two classes above in Truss.cpp. and what result will get after invoke the two classes. thanks.
Re: getdisp()
i used theNodes[0]->getDisp()
getdisp()
why i get 0 when i use the getDisp() class in element. is there any thing i forget?
- Fri Oct 18, 2013 12:44 am
- Forum: Framework
- Topic: get the displacement
- Replies: 1
- Views: 2157
get the displacement
how to get the nodal displacement of the committed step and the update step in my new element cpp. thanks a lot.
- Wed Oct 16, 2013 5:13 am
- Forum: Framework
- Topic: the midpoint of i and i+1
- Replies: 5
- Views: 4424
Re: the midpoint of i and i+1
I want to get the midpoint load of the element or nodal external Load when formUnbalance.
- Wed Oct 16, 2013 5:06 am
- Forum: Framework
- Topic: formEleTangent
- Replies: 1
- Views: 2249
formEleTangent
In the code below, what does the " theEle->addMtoTang(c3)" mean ? why doesn't it get the M matrix from the trusselement for example. thanks a lot. int Newmark::formEleTangent(FE_Element *theEle) { if (determiningMass == true) return 0; theEle->zeroTangent(); if (statusFlag == CURRENT_TANGE...
- Wed Oct 16, 2013 2:42 am
- Forum: Framework
- Topic: flowchart of opensees
- Replies: 1
- Views: 2479
flowchart of opensees
is there any flowchart of opensees for trusselement analysis, in which Newmark 0.5 0.25 is used.
i wonder how the classes are called .thank you very much.
i wonder how the classes are called .thank you very much.
- Mon Oct 14, 2013 5:23 pm
- Forum: Framework
- Topic: the midpoint of i and i+1
- Replies: 5
- Views: 4424
Re: the midpoint of i and i+1
sorry, i means the nth step and i+1 means the (n+1)th step,we can regard as the step at time t and the step at time t+deltat respectively.