# How to set up a forced vibration excitation curve on the model?

**URL:** <https://prepomax.discourse.group/t/how-to-set-up-a-forced-vibration-excitation-curve-on-the-model/218>\
**Category:** General Questions\
**Created:** [June 3, 2022, 5:59pm UTC](https://prepomax.discourse.group/t/how-to-set-up-a-forced-vibration-excitation-curve-on-the-model/218 "2022-06-03T17:59:12Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![manuelf](https://avatars.discourse-cdn.com/v4/letter/m/e99b99/32.png) [@manuelf](https://prepomax.discourse.group/u/manuelf)\
**Post date:** [June 3, 2022, 5:59pm UTC](https://prepomax.discourse.group/t/how-to-set-up-a-forced-vibration-excitation-curve-on-the-model/218/1 "2022-06-03T17:59:12Z")

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I would like to simulate a model under forced vibration (if it’s posible) with this software I’ve started to use. I’m interested in using several excitation curve, such as: time & amplitude, frequency & amplitude, frequency & PSD. For random and harmonic cases.

Best regards  
Manuel Fermín Fonseca

Thanks in advanced

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**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\
**Post date:** [June 3, 2022, 6:20pm UTC](https://prepomax.discourse.group/t/how-to-set-up-a-forced-vibration-excitation-curve-on-the-model/218/2 "2022-06-03T18:20:25Z")

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Dynamic analysis procedures other than natural frequency extraction are not yet supported. However, you could do the initial setup in PrePoMax, export the input file, make the necessary keyword changes manually, submit the analysis using standalone CalculiX and postprocess it in GraphiX for example. The following dynamic analysis steps are supported in CalculiX:

- linear
  - transient modal dynamics
  - steady state dynamics
    - harmonic periodic loading
    - non-harmonic periodic loading

- nonlinear
  - implicit
  - explicit

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**Author:** ![manuelf](https://avatars.discourse-cdn.com/v4/letter/m/e99b99/32.png) [@manuelf](https://prepomax.discourse.group/u/manuelf)\
**Post date:** [June 3, 2022, 7:27pm UTC](https://prepomax.discourse.group/t/how-to-set-up-a-forced-vibration-excitation-curve-on-the-model/218/3 "2022-06-03T19:27:58Z")

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Thank you sir, I’ll check some videos about cálculix standAlone.

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**Author:** ![mkraska](https://avatars.discourse-cdn.com/v4/letter/m/96bed5/32.png) [@mkraska](https://prepomax.discourse.group/u/mkraska)\
**Post date:** [June 4, 2022, 7:31pm UTC](https://prepomax.discourse.group/t/how-to-set-up-a-forced-vibration-excitation-curve-on-the-model/218/4 "2022-06-04T19:31:39Z")

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Have a look at this example: [CalculiX-Examples/Dynamics/Discrete at master · calculix/CalculiX-Examples · GitHub](https://github.com/calculix/CalculiX-Examples/tree/master/Dynamics/Discrete)

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**Author:** ![manuelf](https://avatars.discourse-cdn.com/v4/letter/m/e99b99/32.png) [@manuelf](https://prepomax.discourse.group/u/manuelf)\
**Post date:** [June 4, 2022, 10:17pm UTC](https://prepomax.discourse.group/t/how-to-set-up-a-forced-vibration-excitation-curve-on-the-model/218/5 "2022-06-04T22:17:51Z")

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Thank you prof. I’m checking it out … i need deep into cálculix.