Jump to content
The search index is currently processing. Activity stream results may not be complete.

All Activity

This stream auto-updates     

  1. Last week
  2. Outstanding tool... thank you very much. cialis super active
  3. Earlier
  4. Thanks a lot, Heinrich! I've been missing out on the new release!
  5. Hi, When viewing the optimization results, there is an option to remove selected design from the table (the red X button on the attached image). When hovering the mouse pointer over that button, it says "Remove from table (not delete)". After having removed some designs, is it possible to restore them back to the table? Thank you, - Mansur
  6. Hi Rizuan, very good. FINE and CAESES are well known combination so hopefully it will be 'smooth sailing'... Cheers, Heinrich
  7. Hi Mr Heinrich, The CFD software that I will is NUMECA FINE MARINE, currently my institution on progress to buy the license. Best Regards, Rizuan
  8. Hi Rizuan, the important thing to note is, that CAESES itself does not offer any sort of CFD computations. If you want to calculate the total resistance Rt you need to connect CAESES to a CFD solver of your choice through the Software Connector. Which CFD code do you typically use or have licenses available for? Best regards, Heinrich
  9. Hi Mr Heinrich, First of all, thank you for your sir. I already go thought for the tutorials in CAESES, such as hull form modeling using delta shift and lackenby method. However, I unclear about how to put Rt (total resistance) in the set up and how to make the flow of dependency as I attached below. Thank you. Regard, Rizuan
  10. Hi Rizuan, I recommend you start by looking through the tutorials and samples related to hull design. Which software are you planning to use for CFD? Best regards, Heinrich
  11. Greeting everyone, I’m a postgraduate student from Malaysia. Currently I doing research of optimization of ship hull form towards reducing total resistance. However, I just a beginner in this CAESES software. I really seek for your guidance. If anyone have an example how to optimize ship hull form, can I have that file to use as my reference. Thank you.
  12. Dear Milad, If I understand correctly, then yes, that is perfectly normal. The 2000 LHS samples is what you use to train the model. If you'd evaluate your model at these exact points, the prediction would perfectly match the training data (at least for Kriging that is the case). However, the model cannot just predict a pareto front "out of the blue". Usually, what we do is, to run a MOGA (multi objective genetic algorithm) optimization on the model. With large enough populations sizes and number of generations this allows to quickly find pareto-optimal designs (that means that for those designs there is not other designs better in one objective without being worse in an other objective). Best regards, Heinrich
  13. It looks lovely ! Thanks for sharing the demo. Have a great weekend. Cheers, Yuwen
  14. Hi again, I believe the Dakota code somehow hide some of points after running the simulation. I have used the LHS to simulate 2000 samples. Then I used those 2000 points for Kriging surrogate model. The Pareto front looks good but with fewer points than LHS. I want to know this is normal or I missed something? Regards
  15. Dear Yuwen, the code is not that straight forward to explain. Mostly it's sine/cosine distribution functions, but there are quite a few additions here and there. Would you not rather need a topology like outlined in the attached project, anyway? Cheers, Heinrich gridDemo.cdb
  16. Dear Heinch, Thanks for the reply. The surfaces I generated is created from the Fsubsurface feature where I give four surface edges and the parent surface, and it will return me a four edge parametrized surface, ready for meshing. Hence, I dont have control over how the surface can be parametrized differently. If you look at the attached images. I have a wing that is connected to a fuselage. At the intersection where the wing is attached to the fuselage, the wing and the fuselage joint patches have same mapping factor, so their boundaries edges will be aligned. However, if you look at the surface in front of the fuselage joint patch, I need to manually tweak the mapping factor (-0.7) so that I can have smooth transition in the size of the mesh from the fuselage joint to the fuselage nose. It would be great if I can know for example, given the length and the width of a patch, and also number of panels in the u and v direction, what mapping factor I need to give so that I can make sure the size the mesh at the boundary of two neighboring patch, will have similar length and width, or aspect ratio. Again, if I simply set the distribution to be uniform, this won't be a problem, but if I want to have non-uniform distribution, I will probably need the equation in order to know what would be the right mapping factor to put in. Please let me know if you have any suggestion. And If it is not of too much trouble, could you help ask the developer to look for the equation ? If it is too hard to find, I guess I can create a simple rectangular patch and try to reverse engineering the equation on it. Cheers, Yuwen
  17. Dear Yuwen, I'd have to ask a developer to take a look into the code to answer that question. However, I think it might be enough for you to know that the distribution (if not set to be uniform) is dependent on the parametrization of the underlying surface. Hence, by parametrizing the surface differently, you can freely control the distribution of cells. Cheers, Heinrich
  18. Hi there, I am trying to mesh a wing using the meshengine. I want the mesh to be cosine distribution so it is more clustered towards the wing leading and trailing edge. I realize that with the mapping factor, if put in negative value, it will sort of give the result I want (see attached). And the larger the negative value , -1 --> -0.7 ----> -0.5, the more clustered the mesh will be in both ends. May I know what is the underlying formula that calculates the meshing spacing given the number of panels and mapping factor ? So I can understand better what goes on. Thank you. Yuwen
  19. What exactly did you do when "running Dakota". Did you run an optimization or just calculated one set of pareto designs? Could it be that the blue dots in the second plot are additional samples that where generated before the generation of the first Surrogate?
  20. Hi, Yes, out of 2000 samples from LHS, only fewer points are shown in Kriking. What I did is: 2000 samples with LHS then, running the Dakota (Kriking) and I ticked the LHS before running. after that, there are not 2000 points but less. Regards
  21. Hi Milad, I am not quite sure if I understand the question. You mean that out of the 2000 LHS samples only a few are shown after you have calculated the pareto designs? Do you create the plots in Excel and add the pareto designs from the finaldata file? Cheers, Heinrich
  22. Dear Mr. Heinrich von Zadow, Hello again and thank you for your reply I need some help regarding a Pareto fronts obtained from the Dakota code. I have used LHS to generate 2000 samples, and then I used Dakota with Kriging approximation based on LHS samples to generate a surrogate model. the graph shows less points and Pareto fronts, why after running the Dakota we cannot see those 2000 points anymore. It seems Dakota somehow select some points based on some algorithm and remove other points. How can I explain this in my report? Please see the attached pictures. Best Regards
  23. Hi Carlos, I think I remember these black BReps from the good old CAESES4 days 😉 If I recall correctly this happens when importing IGES/STEP from certain other CAD tools and can be easily resolved by just assigning a different color to the imported parts. Since they are currently black, you would have to use the BRep operation "remove colors" first and then assign a different color... Best regards, Heinrich
  24. Hi Rizuan, On our webpage please go to Support > "Your Licenses" Once logged in, please check the status of your license. By clicking on the manage button on the right side, you may have the option to release a hanged webfloat slot. Please let me know if this resolves your problems. Cheers Ceyhan
  25. Hi Carlos, On our webpage please go to Support > Helpdesk. Or you can reach it directly through "https://helpdesk.caeses.com" Alternatively, once you start using Caeses 5, you can reach the Helpdesk directly through the Caeses gui. Cheers Ceyhan
  26. Greeting, Something happened when i traying to login into CAESES. it say no float slot available. Can someone help me. Thank you.
  27. Hello Ceyhan, How can I do that? Best regards, Carlos
  1. Load more activity
×
×
  • Create New...