XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX''"> Aerospace Spectrum File Support
This section describes the aerospace spectrum file support in MSC.Fatigue. It extends the previously cumbersome methods for generating stress spectra for the aerospace sector by making use of a spectrum file consisting of load events that reference static stress cases in a load control file. Load time histories are not required as stress spectra are generated entirely from the information in ASCII editable Spectrum (extension .spe) and Load Control files (extension .lcs). In essence, the stress spectrum at each analysis location (nodes or elements) is generated by stepping through a sequence of static load cases that are defined in the Load Control file.
Objective
• To illustrate the concept of generating a stress spectrum using the Spectrum and Load Control files to create a fully reversed stress cycle.
• To show the results obtained here are identical to those obtained in the first exercise in Chapter 2 of the Quick Start Guide.
Aerospace spectra are not supported for the following analysis types:
• Strain data in FES file
• Seam weld
• Spot weld
• Vibration fatigue
• Multi-analysis (duty cycle analysis)
• Fast Analysis
• Critical Plane & Multiaxial Analysis
Table 16‑1 Chapter 16 Necessary Files
File |
P3_HOME/mscfatigue_files/examples/simpleSN.op2 |
P3_HOME/mscfatigue_files/examples/example.spe |
P3_HOME/mscfatigue_files/examples/example.lcs |