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Mr. Heinrich von Zadow

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About Mr. Heinrich von Zadow

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  1. Hello dear Heinrich, I am trying to follow your video of Bulbous bow modeling, but in my Caeses version I can't find Features/ HullDesign/isomapping.

    Could you indicate me what is the new command for It  in Caeses 4.3.1 please? Is  there a document relating other commands that has change also?

    Best regards,

    Alros

     

    1. Mr. Heinrich von Zadow

      Mr. Heinrich von Zadow

      Dear Alros,

      we don't ship the feature within the default installation package of CAESES. It was just something I put together a while ago for demonstration purposes. I attached it here.

      I recommend you try out the new BRep Morphing in CAESES5 -- it does a very similar thing to what is shown in the video, but should be much more flexible and powerful. There will also be a webinar very soon on the subject which you might want to sign up for:

      https://www.caeses.com/events/event/webinar-how-to-efficiently-optimize-your-geometry-with-morphing-in-caeses-5/

      Cheers,
      Heinrich

      isoMapping.fdf

  2. Dear Chien, the position value is parametric. I modified the input surfaces for your blade such that now (0=start, 1=end and anything in between depends on the internal parametrization of your input surfaces, i.e. knot vector, control points, degree, etc...). Practically, in most cases you would need to know your leading edge position (now 0.5) and you can simply find out which side is suction and pressure by trial and error. I recommend that you move the hub seam out of the way (by adding 180° to the start and end of the hub contour). Also the trailing edge doesn't look ideal. I increased the tangent factors of the underlying fillet surface as a simple fix: Not sure if it makes a difference in this case, but please note, that I used the new 5.0.4 release. Unfortunately I couldn't get the variable fillet to work right away, either. I will try to find some time to take a closer look. Cheers, Heinrich propeller.cdbc
  3. Dear Chien, why don't you upload yours? Probably even more helpful for you... Cheers, Heinrich
  4. Dear Chien, yes, this is possible, although a bit tricky at times because you will need a very clean model to begin with... The result would look something like this: The corresponding settings here where as follows: Cheers, Heinrich
  5. Hi Carsten, didn't know that, I guess this is new with CAESES 5 -- thanks for filling me in. Cheers, Heinrich
  6. Hi Rohan, not directly. Best option would be two trimeshes "trimesh01" and "trimesh02" (one for each surface) and an imageCurve "c1" with the source "trimesh01.getShortestDistanceLine(trimesh02)". You can then create a parameter with "c1.getLength()" for the actual distance. Cheers, Heinrich
  7. Hi Rull, I looked at your project and it works just fine -- see attached animation. I guess there will be some tweaking of the spacing and transformations of the points to get some really good shapes, but technically, it works. Did you make sure you look at the image surfaces and not the initial ones? Cheers, Heinrich
  8. Hi Rull, I can not tell this from the picture alone. Did you set the FFD as a transformation (create and image surface from your existing bulb or assign it to a BRep if that's what you have). If you can't get it to work, feel free to attach your project here. Best regards, Heinrich
  9. Dear Rohit, the design variables are used to describe/modify the functions given in 01_blade/functions. You can see how they affect their shape in 3D: You can find detailed information on their exact definitions in the documentations. To get there, just click the little blade icon next to the name of the blade: Best regards, Heinrich
  10. Hi there, you might want to start by extracting the underlying surfaces of your BRep (create a BRepPart from it and then right-click > extract underlying surfaces) and take a look at them. If they are suitable (somewhat rectangular and nicely parameterized) you can get away with creating panel meshes from them directly. In my experience there will probably be at least a few regions which you have to re-model in order to get suitable patches for mesh generation. Cheers, Heinrich
  11. Hi Zhen, just a small addition in case someone else stumbles across your question. For an actual (perfect) circle you can not use an F-Spline. Behind the scenes an F-Spline is a B-Spline curve, optimized with respect to fairness and constrained at start, end, start-tanget, end-tangent, curvature, enclosed area, etc... That means, if you set the area as the area of a circle and also match the tangent at start and end you will get something that is really close to a circle, but not a perfect circle. For an actual (quarter of a) circle, you need a NURBS curve with 3 control points. The weight of the center point needs to be set to 0.5*sqrt(2). In order to keep the area constant while moving points 1 and 3 (in your picture), I suggest a delta shift and a brent (you can search the forum for nested optimization to see how the brent algorithm can be used to adjust the area to a certain target value). Cheers, Heinrich
  12. Hi Gunnar, very good. If you would like me to take a look at the mesh, feel free to upload it. Best regards, Heinrich
  13. Hi Gunnar, You imported an STL file. Try using s STEP or IGES if you can. (These are not discretized, but NURBS-based) If you can get your hands on such a format, you can technically get to the underlying surfaces. However, they might be untrimmed and hence, not work for generation of your panelmesh. To check, create a BRepPart and use right-click "extract surfaces". If STL is all you can get, you don't want to put that in a BRep, but rather use Trimeshes and Solids. For trimeshes (maybe you can get one with higher resolution) you could try the right-click "split by angle". This should make quick work of the reparametrization of the individual faces. Best regards, Heinrich
  14. Dear Rohit, if by download you mean export, you can simply select the geometry objects you would like to export and choose File>Export> and from there choose the format you need. See below screenshot for a list of available formats (depending on your license the list may vary): Best regards, Heinrich
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