Output File

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Output File

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Theory

In early program versions this file contained, in addition to a data echo and a summary list of modes, a table of modal displacements and rotations for each node of the finite element model, for each eigenpair of the solution. This output was certainly comprehensive, but its volume made it difficult to examine in detail. In more recent versions, the data echo section and the summary list of modes are still present, but you can now control directly what else the file contains.

You can control the file content in three ways. Firstly, you can specify directly what modes are to be included in the output; unless you specify otherwise, the output file does not contain details of any individual eigenpair. Secondly, you can nominate that output for each eigenpair actually included in the file is for a selected set of elements only, rather than all elements (which is the default). And thirdly, you can optionally include details of the static solution (used to determine the stiffness matrix K).

In addition to modal displacements and rotations, total and incremental curvatures and stresses are included in the output. Also, displacements are output in both global and local axes for a riser you have identified as an SCR. So for example for an SCR in-plane mode, displacements in axial and transverse directions are added to the more usual global X, Y and Z displacements.

Relevant Keywords

*OUTPUT OPTIONS is used to specify the eigensolution details to be routed to the output file.