SAFIR NULL
Manuals and User Guides for SAFIR NULL. We found 1 manuals for free downloads User guide
Below you will find brief information for the process of generating input files for 3D structural analysis. This involves modifying existing 2D analysis files, calculating torsional stiffness, adjusting thermal and mechanical input parameters, and correctly managing symmetries and degrees of freedom within the SAFIR software environment.
Key Features
Calculation of torsional stiffness in section
Conversion of 2D input files to 3D format
Modification of thermal analysis (.TEM) files for 3D
Modification of mechanical analysis (.IN) files for 3D
Detailed guidance on using symmetries (YSYM, REALSYM)
Adaptation of degrees of freedom (DoF) for 3D analysis
Consideration of material mechanical properties, including Poisson's ratio
Frequently Answers and Questions
What is the starting point for calculating torsional stiffness in SAFIR?
The starting point is an existing input file created to calculate temperatures, typically named C2T.IN. This file is then copied and modified for torsional stiffness calculation.
Why is it important to fix the value of the solution to 0 in some nodes when using symmetries for torsional stiffness calculation?
If the whole section is modeled without symmetry, fixing the solution to 0 at one node of the axis of symmetry is absolutely required. Otherwise, the warping function at all nodes will be offset by an arbitrary value, leading to incorrect results in torsional mechanical analysis. For discretised sections with REALSYM commands, the solution must be fixed to 0 at all nodes on the axes of symmetry, including those not used in REALSYM.
What commands need to be replaced in the C2TOR.IN file for torsional stiffness calculation?
The commands TEMPERAT, TETA, TINITIAL, and MAKE.TEM should be replaced by the single command TORSION followed by the values 0.9 and 20.0.
What are the key changes required in the mechanical analysis IN file to adapt from 2D to 3D?
Changes include increasing the number of nodes by 1, updating NDIM from 2 to 3, changing NDDLMAX from 3 to 7, defining 7 degrees of freedom for existing nodes and 0 DoF for added nodes, adapting NFIBERS, adding a third coordinate (Y) to existing nodes, adding the fourth node to beam finite elements, and modifying load components (DISTRBEAM to 3 components, NODELOAD to 6 components).
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