updateParameter for Viscous material

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chenari
Posts: 7
Joined: Thu Apr 16, 2015 11:09 am
Location: sharif

updateParameter for Viscous material

Post by chenari »

I need to update Parameter damping coefficient of uniaxialMaterial Viscous through dynamic analysis....updateParameter command not work for this Viscous Material.

what way suggest me for this problem in the OpenSees ???????????????
the matlab program not work for my master thesis...


the code below is simple example for my problem that Viscous material can not update through dynamic analysis..

wipe all
model basic -ndm 2 -ndf 3
file mkdir rem
node 1 0. 0.
node 2 0. 0.
fix 1 1 1 1
equalDOF 1 2 2 3
mass 2 11025. 0. 0
uniaxialMaterial Elastic 1 290000.
uniaxialMaterial Viscous 2 290. 1
element zeroLength 1 1 2 -mat 1 -dir 1
element zeroLength 2 1 2 -mat 2 -dir 1
recorder Node -file rem/node22disp.txt -time -node 2 -dof 1 disp


set accel "Series -dt 0.01 -filePath elcentro.txt -factor [expr 9.81]"
pattern UniformExcitation 2 1 -accel $accel

constraints Plain
numberer Plain
system BandGeneral
test EnergyIncr 1.e-8 8
algorithm Newton
integrator Newmark 0.5 0.25
analysis VariableTransient

for {set i 1} {$i<4000} {incr i} {
set f 200.
parameter 1 element 2 C
updateParameter 1 $f
remove parameter 1
}

would you like to explain the best idea about this problem solution??? (except link OpenSees with matlab program)!

I appreciate if somebody help me to find out a solution for my problem. :? :? :? :? :?
fmk
Site Admin
Posts: 5884
Joined: Fri Jun 11, 2004 2:33 pm
Location: UC Berkeley
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Re: updateParameter for Viscous material

Post by fmk »

i have modifie code to allow update of the C coeefiecient .. it will be in 2.4.6 that hopefully i release today
chenari
Posts: 7
Joined: Thu Apr 16, 2015 11:09 am
Location: sharif

Re: updateParameter for Viscous material

Post by chenari »

Dear fmk
thank you
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