Frequently Asked Questions - CAESAR II - Help

CAESAR II Users Guide (2019 Service Pack 1)

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English
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CAESAR II
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CAESAR II Version
11.0 (2019)

What are global coordinates?

Global coordinates define the mapping of a physical system into a mathematical system. For a given model, the global coordinate system is fixed for the entire model. In CAESAR II, there are two alternative global coordinate systems that you can apply to a model. Both coordinate systems follow the Right Hand Rule and use X, Y, and Z as mutually perpendicular axes. The first uses the Y-axis vertical, while the second uses the Z-axis as vertical.

What are local coordinates?

Local coordinates represent the mapping for a single element. Use Local coordinate systems to define positive and negative directions and loads on elements. Typically, Local Coordinate systems are aligned with the elements, therefore vary throughout the model.

What coordinates are used to plot and view the model?

Use the global coordinate system of the model to generate plots of the model. This is necessary because each element has its own local coordinate system, and these local systems vary from element to element. Local coordinate systems are an element property, not a system property.

How do you obtain nodal displacements in local coordinates?

In general, you do not. Displacements are a nodal property. Nodes do not have local coordinate systems, elements do. For more information, see Restraint Data in Local Element Coordinates.

What do you do with local coordinates?

In most instances, nothing. The local coordinates are only useful in CAESAR II is when dealing with a skewed nozzle. This coordinate system is used in the Local Restraint Report.