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Found 48 results

1. ## mass OPtimisation by changing square size and thickness

Attached is a Hypermesh deck of a structure whose mass I’m trying to minimize. The structure has a square shaped core covered on the top and bottom by composite facesheets. Shell elements have been used for modeling. The size of the square and the thickness of its wall determine the buckling characteristics of the facesheets. I’ve modeled using a square of side 6mm and its wall thickness is 1.5 mm (shown in the snapshot below). By varying the size of this square and changing the wall thickness, I’m looking to minimse the mass, the constraint being that the buckling factor must always be greater than 1. Could you please help me achieve my objective? Thanks, Kushal Agarwal. square_foam_opti.hm
2. ## Parametric Study in AcuSolve

Hi, I wanted to setup the parametric study for a fan flow analysis at different operating speeds by using HST-AcuSolve. It would be really helpful if it is possible to perform parametric study using hyperstudy. Regards, Vignesh V.
3. ## Not able to create response with Abaqus 2017 .odb file

Hello All, I have two questions 1. I am trying to do a DOE in Hyperstudy (2017) with ABAQUS (2017) as Solver. I created a new model, parametrized the XX.tpl file, registered the solver and typed XX.INP in solver input file field. The problem occured when i tried to define a response. I ran the simulation in Abaqus once to get the .odb file. I then put the file in 'approaches\nom_1\run__00001\m_1' to define responses. But when i tried to drag the file into the work area, it says 'file not recognized by Hyperstudy reader' and Hyperstudy text extractor gets selected. Please help me with this problem. 2. Is it possible to do DOE for physical experiments (i.e. without creating an expression for evaluating responses from Design variables) ? Thank you, WBR R: Prasaenna
4. ## .lua script for exporting far field data

Hi, I am looking for help with extracting the far field data from FEKO and importing it into HyperStudy. I have tweaked the .lua script which was provided in example I-4 in the Example Guide. The attached script seems to run without any errors (dummy value is imported into HyperStudy) if I comment out lines 17 and 24 of the attached code. Any help is appreciated Here is the code is plain text: -- -- Run into POSTFEKO to fetch results and push the scalar values to a HyperStudy .hstp file -- HstUtl = require "hst.hstutl" local app = pf.GetApplication() local config = app.Models[1].Configurations[1] -- Get first far field result local f_field = pf.FarField.GetDataSet( pf.FarField.GetNames()[1] ) -- get theta values (x-axis) local num_frequencies = f_field.Axes[pf.Enums.DataSetAxisEnum.Theta].Count --local ffdata={} for findex = 1,num_frequencies do ffdata[findex]=f_field[findex].FarFields[1]:Abs() end local dummy=1 -- Create the output file file = HstUtl.NewOutputFile( ) HstUtl.StoreScalarValue( file, "dummy", dummy) HstUtl.StoreScalarList( file, "ffdata", ffdata) HstUtl.WriteFile( file ) -- End of file test.cfx_extract.lua
5. ## Hyperstudy-external function

hello group I have want to know about registering hypermath function in hyperstudy and also how to exchange values between two to definr response See the attached file Best Regards Pratik Hyperstudy Problem.pdf
6. ## Hyperstudy fails automating run execution

Hi, I'm using Hyperstudy 2017.2 and Radioss as a solver. I encounter an error when I perform the evaluate step in the DOE approach. It happens that during a run (whatever) the evaluate and extract steps can't finish succesfully, but there aren't errors in the messages box and in the .out file I can read that analysis is already finished with normal termination: in spite of this, the cursor keeps turning and seems to be waiting to finish evaluation. I realized that when it happens, there isn't the .h3d file in the run folder, even if run is completed and all animation A0# are created. I realized also that by finishing the "hvtrans" process from the task manager, or (is the same) Tclsh85t application, hyperstudy concludes the evaluate step, extracts results and goes to the next run. It's a random problem, but it always happens at least once. Thank you all for helping out.
7. ## Post-Processing Plots explanation

Hello together, I was wondering if there are some kind of tutorials or explanations of the post-processing plots of HyperStudy. I'm trying to understand how ever data set in HyperStudy is been calculated and how every plot is created. Especially the pareto plot, the ordination plot and the linear effects plot are interesting to me. In all the ebooks and overviews I've read hasn't been a complete explanation how HyperStudy creates these plots. Are there some video tutorials or pdf documents where maybe an example is calculated to show which methods are used? It would be a great help if someone has any documents, videos or experiences where I can get this information. I can't really estimate if this is already to deep into learning the program or maybe I just didn't find the right files. I hope somebody can help me out on this topic. Cheers Max
8. ## hyperstudy Use of ROMs (e.g. from Hyperstudy) in Activate

Dear all, has someone already thought about having some kind of R(educed) O(rder) M(odel) block within Activate in the sense of directly using the result of a model order reduction, e.g. created in use of Hyperstudy? Even better would be a block, that directly calls Hyperstudy to execute a model order reduction. Curious to get your thoughts on this... Best regards, Christian
9. ## Bounds Question

Hi All, Am trying to understand hyperstudy using Shapes and I have encountered a bit of a headscratcher. My plate has a hole with a radius of 50mm and I want to examine the effects of changing that radius. When I apply a shape to it and get to hyperstudy it asks me for an upper and lower bound (default -1 and 1) and an initial of 0. My question is, what exactly do these numbers relate to? When I run it creates a hole 37.5mm and 62.5mm radius respectively, but how does that relate to lower and upper bounds of -1 and 1? OKay it has consistently created a difference of 12.5mm but how did it calculate this? Many thanks in advance. Is there any way I could have just said initial = 50mm, lower = 45mm and upper = 55mm? Regards Andy
10. ## HST- AcuSolve Pipe Tutorial *.osi File not created

Hi, We are trying to simulate the HST-AcuSolve Pipe Tutorial as given in the document. We are not able to find the template_srf2.osi file for the definition of file in responses (Step-6 in page 14). Please let us know if any is missed in the document for the creation of *.osi file in the directory defined. Regards, Vignesh V. CFD_Shape_optimisation_Acusolve_HST_pipe.pdf CFD_Shape_optimisation_Acusolve_HST_pipe.pdf
11. ## Composite size optimization plypercentage

How to define ply percentage & balance constrained in HyperStudy? Following are definition from fem file. DCOMP 1 STACK 2 + PLYPCT 45 20 25 BYANG + PLYPCT 90 55 60 BYANG + PLYPCT 45 20 25 BYANG + BALANCE -45.0 45.0 BYANG I have created model in hm for 32 ply. In hyper stydy I am defining discrete design variable for ply direction which will take up values -45,0,45,90. But I am unable to add ply percentage & balance constraints in hyper study. 32_ply.fem
12. ## parameterization of location of cross-members of ladder frame chassis

Dear all, please help me with the parameterization of LOCATION of three cross-members of ladder frame chassis for DOE study using LHS(random design points). The cross-members are to be translated in y-direction in both directions limited to ±100 units. The design variables (continuous, not discrete) are the locations of cross-members from rear end i.e. Y1, Y2 and Y3 and response is the first modal frequency. I want to generate a response surface for freq in terms of Y1, Y2, and Y3. Please tell me how to parameterize their locations to be varied as continuous variables if possible or otherwise to create response surface.
13. ## Hyperstudy with Nastran not running

Hi All, Im trying to run a DOE in hyperstudy using nastran as solver. Once i click evaluate task for 100 Iterations it runs fine for the first 4 runs, then the nastran gives an error "Analysis has stopped due to ......" Nastran open 100 tabs for all the 100 runs. But in the hyperstudy i can see for all the 100 tasks it evaluated "success" for write, execute and extract.. Can someone help me in executing this? Do we need to give any extra parameter to run with nastran? Thanks in Advance Manikanth
14. ## Number of plies as variable

Hello, How can I make the number of plies as the variable rather than the thickness of the ply, since the ply thickness has to be 0.2 mm, and the number of layers can change. And I see that there is nothing like manufacturing thickness when I connect HyperWorks to HyperStudy. I'm using GA as solving algorithm. Thank you.
15. ## question about HS-3000: Fit Method Comparison: Approximation on the Arm Model

in this tutorial, when to set up a fit approach,it require two matrix,one for input,and another for validation, why do this? and when to select the fit mode, the help only says to set the appropriate method, I do not understand this point. whether need I to select the fit method for each above matrix separately? at this point, I think it could not be like that,because the two matrix is in one fit process except we build two fit approachs. for this step, I am frustrated. wish to get some help, thanks in advance! CAE lover
16. ## Hyperstudy - How to Dictate which Thicknesses Hyperstudy investigates

Hi all, This question may be reasonably straight forward to answer (it isn't a trick question at all). When I perform a hyperstudy optimisation study with plate thickness being the variable. Is it possible to dictate what thicknesses I want hyperstudy to investigate? For instance, I have a structure with a plate where I want to know what thickness I can reasonably use without going over a stress limit but I also know that the thicknesses available are 5, 10, 16, 20 mm. How do I get hyperstudy to only look at those values? Cheers Andy
17. ## Hyperstudy extracting response after simulation is complete

Hi All, I have been using Nastran as my solver for Hyperstudy and it works well till the execution of my simulation. But HyperStudy has to wait for some time till the simulation is complete before it starts extracting the responses. I know that I need to write some script which checks whether there are no errors in the simulation and then extract the data. Has anyone come across this and can you let me know how we can script this?
18. ## B Pillar Optimization

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
19. ## Hyperstudy - Design Parameters with Boolean Logic

In the expression builder within hyperstudy, is there anyway to apply boolean logic? I could really do with adding IF statements. I've looked to the functions tab and there doesn't appear to be an option.
20. ## How to define response function for optimizing of bearing length with hyperstudy?

Hello I have to optimize bearing length in extrusion process with hyperstudy(I do this with hxsolver (that relateed with hyperstudy directly)) but my supervisor doesnt accept and he wants me that do with hyperstudy and define objective function but I cant define it. how to define response function for obtaining uniform velocity? Thanks alot.
21. ## parametric optimization

Has anyone done parametric optimization in optistruct-hyperstudy? i want to do that crossbar can slide through frame. I defined morph volume. But i don't know how can i connect desvar and morph volume? Is it right way? i have seen just size/shape configuration, so it's not my way. i had tryed to save volume and looked for txt file. it doesn't consist elements, so i can't use it in hyperstudy. could anyone explain me how does it works?=) Thanks.
22. ## Composite Optimization in HyperStudy

I'm planning to use HyperStudy for multi objective Optimization of laminated composite structure, and I wanted to know it is possible to make orientation of ply as one of the design variable? I want optimum angle for ply, for the given load condition, rather than sticking with the angle given by user. Thank you.
23. ## Shape Optimisation

Hi rahul, i need your help. You can see a below picture for example i am showing. Same as like one tube both ends are fixed and need to pass the stress requirement with reducing the diameter of the tube. So my aim to reduce the diameter of the tube. Is it possible in optimization. i have searched all the tutorials but i didn't find anything.If you have any example files please share me
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