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  1. fran.cesc

    I have got a moment about one point, how do I calculate its equivalent moment about another point?

    In a beam, one constraint gives a moment as reaction. I want to write the equation of equilibrium of moments about a point which is different from the point about which my reaction moment is calculated. How can I calculate the moment about a desired point which is equivalent to the moment...
  2. fran.cesc

    Max and Min RPM

    Hi all, I need to use a fan. I have calculated the internal curve of my system. I saw fan suppliers websites and got the characteristic curve for a fan which works in my range of interest. All the fan curves which I saw are calculated for a certain RPM. So I calculated the fan curves for...
  3. fran.cesc

    Question about the Newton Raphson Method

    I am sorry, but there is something which I don't get. You are saying that there is a way through which I can go from d to F with non linear equations? I thought FEA software could work only with linear equations. So the solver can deal with non linear equation when it goes from d to F, but it...
  4. fran.cesc

    Question about the Newton Raphson Method

    So I do not originally have the non linear curve. You are saying that: I start with a certain value of F and d (on the picture (0;0)). I apply the force equal to the load step (on the picture the force F): now, as you say, I cannot calculate the d from F (where F is the force equal to the load...
  5. fran.cesc

    Question about the Newton Raphson Method

    Hi all, I have got a question about the way the NR method works. I am reading lots of books but I cannot figure it out. Let's consider the non linear graph of the picture(http://nptel.ac.in/courses/105108072/mod07/image/lec1_clip_image026_0000.jpg). My question is: does the solver already know...
  6. fran.cesc

    No Correspondence between Equivalent Load Steps

    Thanks IDS, thanks ChadV Yes you are right. I tried both to set load step amplitudes equivalent between the two cases and a very very high number of load steps for both cases (30000 load steps). The only load which I am considering is that of the cases a and b. No loads or pre loads other...
  7. fran.cesc

    No Correspondence between Equivalent Load Steps

    Hi all, I would like to thank anybody in advance for any help you could provide me. I have got a panel with an aerofoil shape to which I applied a pretension as "initial force". I defined 2 load sets: both load sets are characterised by a ratio 1by2 between the force in x direction and the...

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