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rmarcinik-21-Visitor
1-Visitor
September 5, 2016
Question

trajpar

  • September 5, 2016
  • 6 replies
  • 6786 views

I have attempted to use trajpar and it appears to be turned off for Creo 3.0. Is trajpar turned off?

Is there a config.pro setting that allows for this feature to be used?


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    6 replies

    T
    23-Emerald IV
    TomU23-Emerald IV
    23-Emerald IV
    September 6, 2016

    In Creo 3, trajpar doesn't work unless you press this button:

      R
      rmarcinik-21-VisitorAuthor
      1-Visitor
      September 6, 2016

      I realized my mistake in using trajpar.  I setup a relation after creating the feature.  This needs to be done while creating the feature.

      T
      TomD.inPDX17-Peridot
      17-Peridot
      September 6, 2016

      Correct.  Trajpar is only valid in VSS

      H
      HarikrishnanR1-Visitor
      1-Visitor
      October 13, 2016

      Dear Experts,

      Could you please help me to create the below mentioned areofoil profile? I am new to the " Trajpar"( didn't understand the logic)...

      I could able to generate  to generate leading edge bumps but failed to create the diminishing geometry at trailing edge(by varying chord).

      Please share some advice on this!

      Note:-

      1. "A" is a variable parameter ( example:  @ 10% of chord, @ 40% of chord,@ 70% of chord,@ 100% of chord)

      Thanks,

      Hari

      ----------------------------------------------------------------------------------------------

      "Share your knowledge. It is a way to achieve immortality.” - Dalai Lama.

      T
      TomD.inPDX17-Peridot
      17-Peridot
      October 13, 2016

      Trajpar is simply a "function" that lets you create a variable ranging from 0 to 1 which can be used in a formula.

      How you want to manipulate that formula along a path is up to you.

      In this case you want an undulating edge.  This is best accomplished with a sine or cosine function.  Angles are treated as 1 degree with trajpar.

        T
        TomD.inPDX17-Peridot
        17-Peridot
        October 14, 2016

        Have a look at this file: Creo 2.0 parametric commercial version

        This is very straight forward to show the Trajpar function in the Sweep feature.

        H
        HarikrishnanR1-Visitor
        1-Visitor
        October 14, 2016

        Dear Sir,

        Thank you Very much for your guidance...

        Could you please guide me on following points?

        • Can we do the pattern of “humpback” profile through the leading curve and trailing edge?
        • Can we change the sweep length according to “Graph”( ex. 15% chord,40 % chord etc..)
        • My intent is to remove the material from aerofoil as per humpback profile and make it sold.

         

        If you have some free time kindly guide me …

        Please find the attached CAD model for your information..

        Regards,

        Hari

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        "Share your knowledge. It is a way to achieve immortality.” - Dalai Lama

        P
        psobejko1-Visitor
        1-Visitor
        October 14, 2016

        I will attempt to help - by an example model based on what you submitted (Creo 2.0, M230):

        blade_example.png

        I am sure there are other, most likely better ways of doing this, but please open the file and try to follow along with my "method":

        If you want to pattern the "bulge stripes" along the wing, your sweep trajectories have to follow the boundary blend that describes the underlying shape.  One way to do that is to use an intersect curves generated by a plane offset from the edge of the wing.  In the pattern instances, that offset distance will vary.

        Also, I make use of sweep guide "chains" that carry with them the tangency information.

        I am not sure actually what you want to do with the "WAVE" graph, but I put into the sweep a variance based on a graph.  In my opinion, using the cosine function makes it rather convoluted how the amplitude of the "bulge" varies; still it illustrates how it bulges more at the leading edge, then disappears, then another bump as the bulge makes its way towards the trailing edge.

        Like I said - this example is for illustration, and it needs a lot more work.  For example, you will notice that the bulge stripes are matched at the seams, but not all the way from the leading/trailing edges of the wing!  Perhaps that could be solved by having the sweep do a nearly "full loop", then trimming and re-attaching a relatively simple trailing edge...  Anyway, this is a fun exercise, I'll spend a bit more time with it on the weekend and I wish you good luck!

          H
          HarikrishnanR1-Visitor
          1-Visitor
          October 17, 2016

          Thank you very much Mr. Paul & Mr. Antonius for your precious time and helping hands!

          Kind Regards,

          Hari

          --------------------------------------------------------------------------------------------------

          "Share your knowledge. It is a way to achieve immortality.” - Dalai Lama

          H
          HarikrishnanR1-Visitor
          1-Visitor
          October 18, 2016

          Dear Daniel ,

          Thank you very much for providing the example file and it will definitely help me to execute my task.

          Dear  Paul , Antonius & David,

          Please accept my sincere gratitude for helping me on crisis.

          Kind Regards,

          Hari

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          "Share your knowledge. It is a way to achieve immortality.” - Dalai Lama.

           

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