You really can't analyze a vacuum in CAESAR II.

To begin with, pressure doesn't cause displacement in a piping system, unless you have an untied expansion joint, or unless you activate the Bourdon pressure effects.

Specifying a negative pressure, simply alters the way the axial stress is computed. The axial stress is then (always) added absolutely to the bending stress to complete the code equation.

Collapse and/or buckling are not considered or evaulated in CAESAR II.


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Regards,
Richard Ay (COADE, Inc.)


[This message has been edited by rich_ay (edited November 10, 2000).]