To demonstrate how to restart an analysis, take the pipe section example
in
Example: vibration of a piping system
and restart the simulation, adding two additional steps of load history. The
first simulation predicted that the piping section would be vulnerable to
resonance when extended axially; you must now determine how much additional
axial load will increase the pipe's lowest vibrational frequency to an
acceptable level.
Step 3 will be a general step that increases the axial load on the pipe to
8 MN, and Step 4 will calculate the eigenmodes and eigenfrequencies again.