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Time Varying Load Question

Time Varying Load Question

Time Varying Load Question

(OP)
Dear All,

I am trying to perform an analysis on an aluminum part using a time varying load. Ultimately I will use these stresses for input into a fatigue analysis. As a test I run a static analysis (sol 101) at 8KN and the stresses are very low around 75 MPA. However, as mentioned I need to run a time varying load (sine wave at 20 hz) with the amplitude is 8kN. I also need to preload the part at 6KN and then run thru one fully reverse cycle. I went into excel and using the parameters I was able to generate the proper time load curve. It all looks good and plots smoothly showing the pre-load and the sine wave peaking at 8Kn.

Using solution (601) I am able to perform a non-linear solution to get the good results. However, this requires more overhead for solving. I am fairly new to Nastran but was wondering if there is another solution or approach or method I should be using rather than sol (601).

Any thoughts or comments would be appreciated.

Thanks

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