Global Load and Direction Conventions - CAESAR II - Help

CAESAR II Users Guide

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CAESAR II
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CAESAR II Version
12

The global convention system has the benefit of using the global coordinate system also used by other analyses, such as pipe stress analysis. As a result, nozzle or attachment loads from another analysis can be used directly in the WRC 107/537 or FEA analysis.

The following global convention system is used for a cylindrical vessel:

The vessel direction is +Y direction
The nozzle direction is +X direction (towards the vessel)

Direction cosines of the vessel are:

  • VX - 0

  • VY - 1

  • VZ - 0

Direction cosines of the nozzle are:

  • NX - 1

  • NY - 0

  • NZ - 0

The following global convention system is used for a spherical vessel:

The direction of a spherical vessel is from points B to A

The software uses these direction vectors to transfer the global forces and moments from the global convention into the traditional WRC107 convention.