SACS - Launch Analysis - Self-upending Jacket (Deep Water Jackets)

Dear All,

While simulating launch trajectory for self-upending jacket in SACS (Launch Module) I am encountering "Jacket hit bottom" error.

The same simulation in MOSES runs successfully with adequate mud-line clearance.

I would like to know if it is possible to perform simulation for Self upending jacketusing SACS Launch Module.

Thanks and Regards,

SWARUP Selvaraj.

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  • Hi Swarup,

    This is Georgina.  I am on the MOSES AE team.  I am interested in your question.

    Yes, we expect there to be differences between the MOSES and SACS results. This is the first time I hear of someone trying to model a self upending jacket in SACS.  Have you tried to use the new intra-operability between SACS and MOSES.  This now comes standard with SACS.

    The differences are usually due to added mass calculations on the plate members.  I do not know your model,  I cannot comment on what is happening. 

    Please feel free to contact me via email georgina.maldonado@bentley.com.

    Georgina Maldonado

  • Thank you for your interest Georgina.

    From your reply I understand that SACS launch module cannot be used for launch analysis of Self-upending jackets.

    If Launch analysis for such jackets are performed using MOSES, is it possible to obtain the member stresses of Jacket during various time steps?

    If possible could you share with me the corresponding procedures / manuals.

    Thanks and Regards,

    SWARUP Selvaraj.

  • Hello Swarup,

    Let us take this in a few steps.  Also, we have a two options.

    Option A

    In the original question you mentioned that you are able to run the analysis in MOSES.  How are those files set up?  Are they using the automated tools.  If you do not know what I mean by "automated tools", can you send me the files via personal email.  Do not send the files via this public site.

    Option B

    Can you set up the launch analysis in SACS via the intra-operability feature?  Please see the SACS Launch manual section 2.5 MOSES Launch Input.  This will set up the files ready for the MOSES analysis.

    I can help you do the structural analysis and the code check with either option.  Let me know what approach you would like to take.

    georgina

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  • Hello Swarup,

    Let us take this in a few steps.  Also, we have a two options.

    Option A

    In the original question you mentioned that you are able to run the analysis in MOSES.  How are those files set up?  Are they using the automated tools.  If you do not know what I mean by "automated tools", can you send me the files via personal email.  Do not send the files via this public site.

    Option B

    Can you set up the launch analysis in SACS via the intra-operability feature?  Please see the SACS Launch manual section 2.5 MOSES Launch Input.  This will set up the files ready for the MOSES analysis.

    I can help you do the structural analysis and the code check with either option.  Let me know what approach you would like to take.

    georgina

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