...
Why
...
does
...
analysis
...
not
...
converge
...
for
...
my
...
cable
...
system?
...
ANSWER:
...
Vertical
...
...
may
...
cause
...
convergence
...
problems
...
when
...
they
...
begin
...
analysis
...
with
...
slack.
...
To
...
resolve
...
such
...
an
...
issue,
...
introduce
...
a
...
...
...
which
...
applies
...
a
...
small
...
tensile
...
force
...
to
...
each
...
cable,
...
perhaps
...
with
...
a
...
strain
...
value
...
of
...
-0.0001.
...
Create
...
a
...
nonlinear
...
static
...
...
...
which
...
starts
...
from
...
zero
...
and
...
corresponds
...
to
...
this
...
load
...
pattern.
...
Start
...
all
...
other
...
load
...
cases
...
from
...
this
...
prestrain
...
load
...
case,
...
but
...
apply
...
a
...
scale
...
factor
...
of
...
-1
...
to
...
the
...
prestrain
...
load
...
pattern.
...
This
...
will
...
zero-out
...
the
...
initial
...
tension
...
as
...
other
...
loads
...
are
...
applied,
...
and
...
should
...
improve
...
convergence.
See Also
- Cable FAQ – Initial cable conditions