detlef bergmann - 2001-07-24

Hi,

I have a rather strange problem: The following input can be processed and solved with velvet but not with felt. Where is the difference?  I get a memory error everytime I run felt with this file. Other files work. The problem seems to be the dofs. Works fine with only one dof.

here is the input:

problem description
nodes=3 elements=3 analysis=transient

analysis parameters
start=0 stop=1 step=0.1
beta=0.25 gamma=0.5 alpha=0
mass-mode=lumped
nodes=[2, 3]
dofs=[Tx, Tz]

nodes
1  x=0 y=0 z=0 constraint=fix
2  x=100 y=0 z=0 constraint=loose_plus force=aer mass=1
3  x=120 y=100 z=0

spring elements
1  nodes=[1,2] material=springy
2  nodes=[2,3]
3  nodes=[1,3]

material properties
springy E=1000 A=1 Rk=0.05

constraints
fix Tx=c Ty=c Tz=c Rx=c Ry=c Rz=u
loose_plus Tx=u Ty=u Tz=u Rx=u Ry=u Rz=u ITx=0.5

forces
aer Fx=sin(t)

canvas configuration
node-numbers=true element-numbers=true snap=false grid=false
snap-size=0.2 grid-size=0.2

node-color=Blue element-color=Black label-font="5x8"
tool-color=Red tool-font="fg-22"

x-min=-1 x-max=200 y-min=-100 y-max=100
x-pos=0 y-pos=0 width=502 height=502 scale=2.49751

end

Thanks

M