Transient Dynamic AnalysisJake BlanchardSpring 2008

IntroductionANSYS can solve full dynamic

problems (with inertial and damping effects included)

Examples include:◦Vibration problems◦Waves◦Collisions◦Etc.

Time

Key Elements to AnalysisBe sure to define densitySet up analysis options:

◦Analysis type is transient (start with “full” method for solution)

◦Time step must be chosen in context of period of natural frequencies of structure (shoot for about 20 steps within a single oscillation)

ExampleCantilever beamCross section is rectangular, 2.5 cm tall and

1 cm wideBeam length is 2 m100 N load applied at end of beam for 40 msE=200 GPa=0.3=8000 kg/m3

Natural frequency of fundamental mode is

452.3

AL

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