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Found 152 results

  1. Hi all, I’m trying to achieve a specific shaped structure through optimization but I couldn’t reach this goal yet. I want to achieve a structure which (of course) fulfill all constraints, with minimize weight. So far so good but I want that during the optimization, no horizontal structures are created I tried it with draft in one direction, but the results were no satisfying. At least it would maybe help if it is possible to create two different draw directions (x- and y-direction). Is this possible? I also tried to manipulate the AM-Overhang-Constraints with 0° in horizontal and 60° vertical to get structures with at least 40° vertical, but through this it needs over 100h for 6 Iterations without creating an satisfying shape. Is there a workaround I haven’t considered yet? Thanks in advance!
  2. Hi, I am trying to launch an optimization on Inspire but I am always getting this error about unrealized contact: # -------------------- Progress Tracker -------------------- hwfdmfeprocessor process id = 15200 # Opening Model # Model opened successfully Client = Inspire 18.3 10526 Name = ADCS_V9_Config5_Tests7_2 Maximiser la raideur Masse 25% Fmin 100 Hz (9) ModelName = Model stmodOffsetId = 2 # RunType: OPTIRUN_ANALYSIS = 1, OPTIRUN_TOPOLOGY = 2, OPTIRUN_TOPOGRAPHY = 4, OPTIRUN_SHAPE = 8, OPTIRUN_GAUGE = 16, OSSMOOTH_REANALYSIS = 128 RunType = 2 # Using CAE_HOME='C:/Program Files/Altair/2018/sTInspire2018.3/hwx/bin/win64/' # Time 17:17:59 RUN_STATE = 1 ## Run started # Time elapsed - '6' Seconds <==> Total time taken - '6' Seconds RUN_STATE = 3 ## Generating fresh mesh/Using old mesh #--------Generating fresh Mesh RUN_STATE = 7 ## Meshing completed successfully # Time elapsed - '1511' Seconds <==> Total time taken - '1517' Seconds RUN_STATE = 15 ## Realizing model #--------Unable to realize contact (Contact 50) as UdbSet for Primary features can not be created #--------Unable to realize RUN_STATE = 527 ## Synthesis run completed successfully # Time elapsed - '68' Seconds <==> Total time taken - '1585' Seconds # Error - Unable to ralize synthesis data RUN_STATE = 1551 ## Done # Time elapsed - '1' Seconds <==> Total time taken - '1586' Seconds # --------------------- END ----------------------- Could anyone explain me what the problem might be ? Because in my model the contacts seem ok (those are default contacts obtained after using boolean substractions of non-design spaces on a design space volume to avoid intersecting parts) Thank you in advance,
  3. Hello and thank you for your help in advance. The problem is that I'm trying to do an optimization, it runs during a moment but fails and shows to me the next message. Thank you again.
  4. Hi, Since this morning I try to run optimization but I always get the same results: an optimization error (even for a simple model such as below where the load case seems correct to me ...). Do you know where this may come from ? (I have succeeded other optimizations the previous days using the same computer & software configuration, for information)
  5. Is there any way to call a Hypermesh model from MATLAB? Is there any interface for them. I need to use my FEA model which is a Hypermesh model in an Optimization MATLAB code. How I can recall it in MATLAB? Thanks,
  6. Hey guys, I have a question on the theory of the SIMP Method used in OptiStruct to perform a Topology Optimization. I got that the stiffness matrix of a material is varied depending on its "density" and that using the penalization factor p, we are aiming for design with only 0 and 1 values in the end. For me it's still unclear, how OptiStruct is calculating these density values. How does the solver know where I have an element with density 0, 1 or something in between? Kind regards and thanks in advance Simon
  7. Hi there, I wanted to know if it's possible to define thickness steps when performing topology optimization using Optistruct. For example assume there is a body of PSHELL elements, Initial thickness is 10 and base thickness is 2.5 and between these two values only 6 is permissible. Or in another case only 8.5 and 2.5 are possible for final part. How can I go with this kind of problems? The real problem is to decrease some deflections of sheet metal parts by adding welded patches so thickness in different regions can not be any value. For example if initial thickness is 2.5 mm then I want to improve strength by only welding some 6 mm thickness patches to it so optimization output must be only 2.5 and 8.5 mm thickness. Please let me know if my question is not clear. Thanks in advance.
  8. Hello, After completing the optimization, there are 50 runs due to the algorithm and inside all of the runs there are s1.h3d files where I can see the results of each evaluation and I can add results manually in hyperview but for more evaluations it is quite a hard job to do. So I wanted to ask if there is an easier or automatized way to see all s1.h3d files of runs together in hyperview? thank you
  9. hello, i'm doing a size optimization in order to match the drequencies targets for the first 10 modes. so i defined my design variable wich is the PBUSH stifness k1..k6 and as and objective is the MIn using DSYSID (iwth all the 10 first frequancies and the targets) but some how i don't have the right results thats i want i have in my model DESVAR refered to stifness of PBUSH DVPREL1 DRESP1 MIN WITH a DSYSID everythings is well defined i don"t if there something else to add to my optimization to work
  10. I need to define a response to sum up the stress values of all the elements in a component. What is the best way to do it? How the design equation should be defined? Thanks, Soraya
  11. Hi All, I’m working on the structural design of an orthogrid cylinder. I’d like to perform a DOE, in order to assess the optimum number of ring stiffeners. Is there a way to do that with HyperStudy or HyperMorph? Is it possible to automate the process, linking a parametric CAD model in Solidworks to Optistruct? Thank you for your time Enrico
  12. Hi, I need to convert my optimization result to a 3D CAD model for 3D printing. The model is divided into design and non design spaces. When I export the model, only design space is converted. How I can convert the whole model into CAD model. When I try to export the solver deck as .stl file, there is not .stl file option available. I appreciate if someone can help. Thanks, Soraya
  13. flaecheopti_multiobjective.femHello, i was trying to make a multi-objective optimization by combining a "massfrac" and a "compliance" response in the dresp2 "function" card. Unfortunately I always get the following error message: A fatal error has been detected during input processing: *** ERROR # 557 *** DRESP2 3 is not referenced above the first SUBCASE. This type of response must be specified above the first SUBCASE. This error occurs in DESOBJ 3. I don't understand how I'm supposed to reference the dresp2 above the first subcase. The Hyperworks Help does not specify how to reference it above the subcase only that in some cases it is necessary. I tried to create the responses before creating the loadstep but that didn't solve it. I also tried to just cut+paste the objective section from the subcase information in the .fem-file infront of the loadstep section. But running the edited .fem-file from the command prompt didn't work either. Am I missing something here? The .fem-file is (hopefully) attached. Thanks for any helpful tip!
  14. Hello Everyone, I urgently need your help. I have to do an optimisation of a B-Pillar which i have already simulated in Radioss according to 3 point Bending. This was my first time with hyperstudy so i guess i did many thing wrong by defining output responces and contraints i guess. The aim is to hold the intrusion level same and minimize the mass of the structure. I would be really appriciated if someone could help me. i ll post some screenshots here because somehow i cant save the hyperstudy file. Actually i can save but cant open again. It gives error. I just added the size parameters. Shape parameters i will add them later when i understand how hyperstudy works exactly After nominal run i tried to evalute the study But i get this error : Full folder is in the attachments. I need urgent help to finish master thesis. Thanks in advance
  15. Hi everyone, I'm trying to set up a model for an optimization problem and in the model I have CHBDYE surface elements for the heat convection. When I try to run the optimization, I get the error message 'CHBDYE surface element can't exist in topology or free-size design domain.' Does it mean that I can't have those elements on my design space or should I define them in another way? Best Regards Mert
  16. Hello, My question is about the time of calculus on Inspire. I've started an optimization calculus yesterday on my project and it was finished in about 2 hours. After that, I wanted to check the difference in the optimization after activating "optimization" in the property windows of the 8 nuts in my model and the optimization is now running for 16 hours. Is this normal ? Thanks in advance
  17. Hello, I am quite new to hypermesh and I want to create simple solid beam which has a hole and then I want to move the hole. I have built the model in hypermesh and added all the constraints, I have tried morphing but it deformed my meshes while moving the hole by making my beam longer. Would you please help me about which modules I should use? I am currently trying to figure our hyperstudy parametrization
  18. Sorry.I'm confused about how to connect two components,leading to problems below. And i attach the hm file,could you help me check or correct it to run it? Thanks! Messages for the job: *** ERROR # 312 *** In static load case 1 the compliance is negative or large -1.37409e+011. Optimization/buckling analysis cannot be performed. due to possible rigid body mode. FEASIBLE DESIGN (ALL CONSTRAINTS SATISFIED). 1.hm
  19. Sir can you tell me ,how can i calculate th6 NODED 11 MEMBERS TRUSS.hme weight of members of the optimised truss in the result window?I am attaching my file for you.
  20. Hii, I am doing Topology Optimisation of Truss (Benchmark Problem).I am not getting proper results of topology as expected.Please do suggest me what to do for proper analysis & optimisation.I am unable to find out my mistake.I am attaching my files 6 NODED 11 MEMBERS TRUSS.fem 6 NODED 11 MEMBERS TRUSS.hm 6 NODED 11 MEMBERS TRUSS_des.h3d 6 NODED 11 MEMBERS TRUSS_s1.h3d
  21. Hı everyone, We are trying to do lattice optimization with different types. We tried every way, we thought. And we get different errors every time. Finally we have made the hexa mesh using another program. And then solved in Optistruct. Although there is no problem in the solution, the lattice.fem file does not occur. Could you help me? Thank you.
  22. Hı everyone, I want the part of the model to contain a completely lattice structure. But my model are empty places. Could you help me?
  23. Hello SolidThinking community, Could someone please point out what I'm doing wrong, or advise a better way of setting my part up for optimization? My part pivots around a shaft near the top such that, it can swing down to contact a vertical wall. I am unsure how to "fix" the wall in all directions. Currently I am using small displacement constraints set to 10e-6. I have set the contact between the wall and part as "contact", and the contact between the shaft and part as "bonded". The contact along the top surface, where the pressure is applied, is "bonded" with the part. The optimization fails every time.. Any help would be great appreciated. Cheers!
  24. Hi , I would lik to know if someone knows le the link between the analysis and the optimisation work. I mean , i can chose the size of the elements during the analysis ans choose the option coarse or accurate . What is the impact on the optimisation process ? thanks you Best regards Virgile
  25. Hello! I have a rocker which should be optimized. I added force and joints, but no matter I try maximize stiffness or minimum mass (there is always "design violations" with the safety factor) the results are not so good. The picture shows how the rocker works. The .stmod file is also attached. Thank you very much! Best Regards 01_Rocker_FEM.stmod
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