If you have an example you'd like to
see run, contact us.
There is no obligation or cost involved should we decide
to run it.
To illustrate the features and results produced by iSTRDYN,
the following examples are available for downloading and review:
Simple Jeffcott rotor - Shows a relatively simple
rotor constructed from point/line geometry, meshed, and
run for natural frequencies and unbalance response.
Power Turbine using rolling element bearings -
This model, which is shown on the home page, illustrates the definition of a relatively complicated turbine
rotor from a CAD file, meshing, and then analyzing for steady
stresses and heat transfer. A set of linearized bearing
coefficients are obtained and used to calculate natural
frequencies and forced response. Then the non-linear
bearings are substituted and the same analyses are rerun.
Differences with the linear analysis, as shown in the
response displacements below, are dramatic. In the upper
plot, the linear response is displayed, with a predicted
critical speed at roughly 18,000 rpm. In the lower figure,
the non-linear solution shows a hardening response, with the
critical speed pushed up to 29,000 rpm. Note that these
figures are created directly by
Generator using fluid film bearings - Describes the
creation of a generator model from a CAD file, meshing, and
using static loads to obtain bearing coefficients for use with natural frequency and
forced response analyses. The actual journal bearings are
then defined and used to rerun the results. Response with
the actual bearing calculations is dramatically different
compared with the assumed load solutions. (This example
will be posted in the near future).