Good day,
I design the rail-wheel geometry and the harmonic frequency ranges between 20-10kHz with 500Hz solution intervals and the results makes sense. Most of the time on the related literatures they use 10 or 20 Hz solution intervals. I want to know how to correctly make a choice of number of solution intervals when performing harmonic analysis?
Dear Dr Podila:
"Ansys Mechanical APDL and Mechanical Workbench can perform harmonic analysis on a structure, determining the steady-state sinusoidal response to sinusoidal varying loads all acting at a specified frequency. Some load types can be applied with a phase offset. Figure 1 above shows the Workbench Project Schematic for a Harmonic analysis, and includes a Modal analysis to characterize the structure. This Harmonic analysis is not using modal superposition, as can be seen in the fact that Solution results from the Modal analysis are not linked.
Many structures are tested per customer specification with base accelerations swept across a range of frequencies. Such a test can be implied by fixing a base in Ansys, and applying an acceleration load to the whole model with an ACEL command. The resulting movement at a point on the FEA model is relative to a fixed non-moving base, and is not what would be picked up at the point with an accelerometer. To replicate acceleration movements at a base would require an acceleration input at selected geometry, which Ansys does not directly support in Harmonic analysis." For more on this , please take a look at :
https://simutechgroup.com/base-acceleration-in-harmonic-analysis-using-ansys-mechanical-workbench-v14-5/
Regards--
https://simutechgroup.com/base-acceleration-in-harmonic-analysis-using-ansys-mechanical-workbench-v14-5/
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