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Ansys Time-History analysis problem

Ansys Time-History analysis problem

Ansys Time-History analysis problem

(OP)
Hello

I wanted to ask if anyone can give an advice on what I am doing wrong, I am quite new to this. It is a problem with Ansys Time-history post processor.

What I have done so far is that I have applied 6 different section forces on an offshore jacket construction, moments and forces about 3 axis (modelled in ANSYS classic in 3D using BEAM and MASS elements). These forces (calculated using NREL's FAST program) are varying in time and are represented as time series over a period of 1500 seconds, so I had to import them as TABLEs. The problem is when trying to display eg. von Mises stress variation in ANY element+node as a function of time using Time-history post processor. The time axis is displayed correctly (min value 0 max value 1500 seconds). Problem is with the stress part. It displays stress as constant value during this period (min 80 max 80). This is impossible since all loads are time varying.

Here are the applied settings:

In Analysis Type > Solution Controls > Basic > I have selected "All solution items" and as frequency "Write every substep" is selected

Also in Load Step Output > Solution Printout > All items and every substep is selected ...

I get constant stress every time and I have tried to "play" with the settings and nothing.

Please advice

Thanks

RE: Ansys Time-History analysis problem

(OP)
Thank you very much!

All it needed was analysis type. Even though I had time dependent forces it was not sufficient/correct to select static analysis.

I changed the analysis type and followed the tutorial you posted and now I get exactly what I want. Thanks again. Much appreciated.

RE: Ansys Time-History analysis problem

No worries. My pleasure...

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