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Nayak

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Everything posted by Nayak

  1. Is it possible to extract the data of movement of grids while free shape optimization with each iteration? I need graphical represenation of movement of Nodes or grid point after Free shape optimization. i.e. From Iteration 0 to end of optimization iteration? Thank you, Best Regards, Jay Nayak
  2. Thank you for your suggestion of the related tutorial, but I have to take constraint in my simulation. In the tutorial they have taken without any constraint for Freeshape. Secondary I got warning regarding crack found in the element, but I guess there is not crack in the geometry. I did also REMESH = 1 and activated. still got error of Mesh distortion and penta mesh element distortion. Error: CPENTA Element is distorted (zero or negative Jacobian) and what is "htdrv module", It shows error occurs in that module. Please give me some suggestions. Thank you, Best Regards, Jay
  3. I have given Mass as a constraint in both the case: Free shape and Shape opti. But for Shape Optimization everythings goes fine. But what kind of constraint I should take for Free shape? Should I limit at perticular nodes about their stress limit? I got the result as you can see in figure, in node vise. despite I have also given design variables. Thank you
  4. Thank you Prakash, I have used shape optimization in my model and I have found drastic reduction in stress by applying Design variables as a shape optimization. But in Free shape optimization I have to select nodes, at that time I can't see that amount of change in stress!! In free shape also I have given the same constraint which I have applied in Shape Optimization: that is Mass of my model. Please give me some Idea or if you have any example then share me. Thank you, Best regards, Jay Nayak
  5. Hello friends, Right now I am doing free shape optimization, in which I have selected some particular nodes where I have higher stresses, but still got error Shows CPENTA element is distorted, you can see the Image related to error. Please give me solution. Moreover, Is it possible to solve free-shape as well as shape Optimization together? Thank you, Best Regards, Jay
  6. I am sorry, I can't share .fem file or any other file. I can only show some pict. if you want. Apart from this I want to ask you one Question. As in figure I have defined 24 shapes, and I did horizontally, vertically, transfer shape. but only in one side in each Shape. the design variable as you can see in the Pict. Is it displacement in particular direction or what? How these design variables decide for the right combination?
  7. Hello Prakash, I got various .grid Files, but one more thing is that, without selecting grid all as my output in Control card, I got 19 Iteration. but when I want each grids, so I have selected Grid all, as you have suggested me, then I got only 9 Iteration, and my model has been converged. so I got only 1 to 9 grids. Can you tell me what is reason behind that? Thank you, Best Regards, Jay
  8. Hello Prakash, I am seeing that in my working Directory more than one .Grid file generating in accorance to Iteration. Can you tell me now how can I Import individual .grid file with OSSMOOTH or any other function. I have tried with OSSMOOTH, with .fem, .sh and .001.grid file which is first Iteration Grid. But it gave nothing.
  9. But with the help of Control Cards>>OUTPUT>>GRID>>ALL, do I get everytime means with every Iteration new Grids of that shape, which I want to optimized? Because from Tools>solver/ & then OSSMOOTH, I got optimized Geometry, but this Optimized shape is my last iteration's Shape. Do I get new shape after every Iteration?
  10. Secondary as you know that DVMREL2 in which I can fill some of Inputs from DESVAR and some from Design Equation, and want to use type: MAT4 and fill new Heat Transfer coefficient.. I hope now you can understand my Problem, why I want to those things at the same time. Thank you,
  11. As you can see r_mass in Response Table, I Need also new volume or area of my geometry.
  12. Because both has ist own Purpose, I have taken mass of constraint of Overall geometry, not only of Optimized Geometry. Secondary I want to know the surface area of my elements which I have Changed or Optimized. Because those area affects the heat Transfer coeffcient only. Once I know the new area I can calculate Heat Transfer Coefficient. Yesterday I was trying to Import all new optimized geometry from .oss file, but I don't get optimized shapes. My aim is just simple to know the area of optimized shape....
  13. Hello Friends, In my Optimization Inputs before I gave mass as constriant and I got new mass everytime in Responses Table. But now I Need volume also, for that I took one more volume Response and Volume constraint with lower bound Zero, so I can see what happen in upper bound. But it Shows nothing in Response Table. Please help... Thank you, Regards, Jay
  14. Hello Prakash, Can you tell me How can I use DVMREL1 Card in which I can edit Heat Transfer Coefficient value "h" and I can attached to Design Varible. But do you have any Example?
  15. Thank you Prakash, Actually If I Change my geometry with the help of Shape Optimization then of course my area also becomes Change, so with every Iteration I got new Geometry or new Shape. And I Need to find area of new shape. Because those Sizes and shape directly related to Heat Transfer Coefficient that I have to calculate again. I hope you can understand. And If you can know any function which I can put in the Loop it self which gives me Area every time with new Iteration so I can easily calculate Heat Transfer Coefficinet. Thank you. Regards, Jay Nayak
  16. I have two questions...... How can I take my Optimized Geometry after changing the Old geometry in my model? and Do I can see with every Iteration what is my new Area of my Optimized Geometry? What happen if I take Volume as a Response? Thank you, Best Regards, Jay
  17. That I know, but I Need to know after changing my shape. That means after Optimization. I have given 10 mm horizontal displacement, 10 mm verticle like 24 shapes defined, so Can I see the CG for those updated shapes?
  18. Hello Friends, As Optimization Inputs in my DESING Variables, the displacement for new shape Change, I want to calculate new Center of Gravity? How can I get in accordance to my Design variable new CG? Make sure I am changing elements which is hollow section. I have defined around 24 shapes and design variable. Thank you
  19. Thanks Prakash, After activating REMESH; I got result. but my Simulation takes so much time around 60 hours, can you tell me what exactly Purpose of REMESH here, Is it everytime Change or calculate new matrx or?
  20. you mean err.grid file? I can sendyou Print Screen of Difference between my actul Grid and err.Grid. As per the Company Policy I can't share files.
  21. Again I want to know that GRIDCON Control Card works only for free shape Optimization, and I am not using Free shape Design variable. I don't understand still should I take that control Card or not? As you can see from Picture I am using that Design variable. After This Kind of error I got new file with Extension _err.grid Make sure My Optimization process takes more than 18 hours so I want to ensure before applying any new Inputs. Thank you...
  22. Thank you for your reply... I will apply. Before that Just ask you one question.I checked solid element Jacobian from as you can see from Picture, and I found 12 elements which have some Problem may be. When I just unmask with attached elements then it's on the same area where I have apply shapes. Make sure I have also checked my Grids, which is exactly same. Let's see after applying your solution, what I will get. Thank you again. Jay
  23. Hello Friends, I am doing shape Optimization in which I got 5 Iteration, in which My Objective function is to minimize static Stress, Constraint- Mass, I have also defined Design Variable with Lower Bound and Upper Bound and Initial value= 0, and move Limit is Default. I don't understand what should be the Problem? Please Guide me. Thank you
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