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Inconcistency between 2D axisymmetric and 3D model
Posted 24 mar 2011, 11:07 GMT-4 Structural Mechanics Version 4.1 2 Replies
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I have a very simple model : A cantilevered cylinder, radius = 0.4m, length = 10m, fixed contraint at the bottom, free everywhere else.
In 2D axisymmetric geometry this cylinder is modeled by a r=0.4m x z=10m rectangle with it's bottom left edge at (0,0).
The 2D axisymmetric eigenfrequency solver only returns the hight frequency compression modes (see image attached), the lower frequency rocking modes are not computed.
The exact same cylinder computed in 3D returns the wanted lower frequency rocking modes (see image attached)
How to computed those rocking modes in 2D axisymmetric geometry.
Thanks,
John Smith.
In 2D axisymmetric geometry this cylinder is modeled by a r=0.4m x z=10m rectangle with it's bottom left edge at (0,0).
The 2D axisymmetric eigenfrequency solver only returns the hight frequency compression modes (see image attached), the lower frequency rocking modes are not computed.
The exact same cylinder computed in 3D returns the wanted lower frequency rocking modes (see image attached)
How to computed those rocking modes in 2D axisymmetric geometry.
Thanks,
John Smith.
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2 Replies Last Post 8 feb 2022, 10:12 GMT-5