Elastic Pressure Independent Wet Level Dynamic

[virginlolarules]

Somewhere is a mistake in my script, but i cant find it:
[code]
# <--> input motion: sinusoidal acceleration at base
wipe
#
#some user defined variables
#
set accMul 9.81 ;
set massDen 2.000 ;# solid mass density
set fluidDen 1.0 ;# fluid mass density
set massProportionalDamping 0.0 ;
set stiffnessProportionalDamping 0.001 ;
set cohesion 30 ;
set peakShearStrain 0.1 ;
set E1 90000.0 ;#Young's modulus
set poisson1 0.40 ;
set G [expr $E1/(2*(1+$poisson1))] ;
set B [expr $E1/(3*(1-2*$poisson1))] ;
set press 0 ;# isotropic consolidation pressure on quad element(s)
set period 1 ;# Period of applied sinusoidal load
set deltaT 0.01 ;# time step for analysis
set numSteps 2000 ;# Number of analysis steps
set gamma 0.5 ;# Newmark integration parameter
set pi 3.1415926535 ;
set inclination 0 ;
set unitWeightX [expr ($massDen-$fluidDen)*9.81*sin($inclination/180.0*$pi)] ;# buoyant unit weight in X direction
set unitWeightY [expr -($massDen-$fluidDen)*9.81*cos($inclination/180.0*$pi)] ;# buoyant unit weight in Y direction
#############################################################

#create the ModelBuilder
model basic -ndm 2 -ndf 2

# define material and properties
nDMaterial PressureIndependMultiYield 2 2 $massDen $G $B $cohesion $peakShearStrain
nDMaterial FluidSolidPorous 1 2 2 2.2e6


# define the nodes
node 1 0.0 0.0
node 2 1.0 0.0
node 3 1.0 1.0
node 4 0.0 1.0

# define the element thick material maTag press gravity
element quad 1 1 2 3 4 1.0 "PlaneStrain" 2 $press $unitWeightX $unitWeightY

updateMaterialStage -material 2 -stage 0

# fix the base in vertical direction
fix 1 1 1
fix 2 1 1

#############################################################
# GRAVITY APPLICATION (elastic behavior)
# create the SOE, ConstraintHandler, Integrator, Algorithm and Numberer
system ProfileSPD
test NormDispIncr 1.e-12 25 0
constraints Transformation
integrator LoadControl 1 1 1 1
algorithm Newton
numberer RCM

# create the Analysis
analysis Static

#analyze
analyze 2

#############################################################
# NOW APPLY LOADING SEQUENCE AND ANALYZE (plastic)
# rezero time
setTime 0.0
wipeAnalysis

equalDOF 3 4 1 2 ;#tie nodes 3 and 4

# create a LoadPattern
pattern UniformExcitation 1 1 -accel "Sine 0 10 $period -factor $accMul"

# create the Analysis
constraints Penalty 1.0e18 1.0e18 ;# Transformation; #
test NormDispIncr 1.e-12 25 0
algorithm Newton
numberer RCM
system ProfileSPD
rayleigh $massProportionalDamping 0.0 $stiffnessProportionalDamping 0.
integrator Newmark $gamma [expr pow($gamma+0.5, 2)/4]
analysis VariableTransient

#create the recorder
recorder Node -file disp.out -time -node 1 2 3 4 -dof 1 2 -dT 0.01 disp
recorder Node -file acce.out -time -node 1 2 3 4 -dof 1 2 -dT 0.01 accel
recorder Element -ele 1 -time -file stress1.out -dT 0.01 material 1 stress
recorder Element -ele 1 -time -file strain1.out -dT 0.01 material 1 strain
recorder Element -ele 1 -time -file stress3.out -dT 0.01 material 3 stress
recorder Element -ele 1 -time -file strain3.out -dT 0.01 material 3 strain

#analyze
set startT [clock seconds]
analyze $numSteps $deltaT [expr $deltaT/100] $deltaT 10
set endT [clock seconds]
puts "Execution time: [expr $endT-$startT] seconds."

wipe #flush ouput stream

[/code]
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[jecky]

i like it..........

[ozpoolaud]

Great info. Thanks for sharing.

Cheers!

[deepakr]

What is the error?