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Found 10 results

  1. Hi Do you have examples/tutorial to build/create NVHD process flow as like picture : 1-How create Assembly Hierarchy? 2- How Create Tagpoints Mapping? 3 - How Connections create and properties? 4- How do Batch Prepare? 5- How do Batch Model Check? 6 - How Batch Modal reduction ? 7 How do-Network View Creation? 8-Control Volume Definition 10- Analysis Manager
  2. Hello all, I am currently working on NVH Frequency response analysis with optistruct and nastran solvers and I see an error of opproximately 10%. Same FEA model has been used in both solvers and the error is 10%. If both the models are created in their corresponding solvers, then the error comes out to be 7%. How good is Optistruct solver for NVH to match Nasran solver? Any benchmarking done on this? Please help me out. Thanks and regards, Punith
  3. hello everyone, i want to do an optimization in order to increase the correlation between experimantal results and numerical ones, using MAC cretria, my design variables are the stifness of the damping springs. my size optimization is well set it works but i don't know how can i connect the expermental result that i have in an .UNV file and the numerical results. to say to optistruct i want to increase the mac between the two. i know that i have to use the parameter TRAKMETH MODETRACK MFILTER. but i don't know the right steps to operate this one. if you have some ideas i will be greatful thanks.
  4. Hello, Does anyone know where can I download macros shown in this link: http://www.altairhyperworks.com/html/en-US/rl/nvh-webinar-opt.htm If I cannot download them, could someone please tell me how to create them? any tutorial or manual would be appreciated!! Thanks
  5. What is the format file to import in Hyperview NVH Utility for Modal participation Analysis? & What are the cards to activate to extract the output format for modal participation factor analysis from Normal modal analysis / FRF analysis ??
  6. Dear all, I am working as NVH engineer. in our case , we use terta solid mesh. my process : first we will make tria mesh and then we will convert into tetra mesh using ( 3D--> Tetramesh--> tetra mesh --> fixed trais/quads to tetra mesh --> simple pyramid --> create per-volume comps --> create. Then the tetramesh will create in a component vol001 ( name of the newly created component). so i need to delete the 2d mesh component and also again i have to rename the component . so i want to simplify my process. i want to create TETRA MESH (3D) in same component where the TRIA elements (2D) are present. but by deleting the 2D tria elements (automatically) during the tetra-mesh conversation process. ??? IS THIS POSSIBLE ? please give your suggestion. so that i can save some time. becoz for every item i need to rename for more than 50 components. thank you.
  7. hello, i'm trying to do a correlation between experimental results and numérical ones, so for this correlation i am using as a reference file a .UNV ( 164) and for correlation file results extracted from a modale analysis optistruct, so once i clic on load an error message apear it said that '' erreur: missing operand ar_@_ in expression..'' as showing in the picture. i'm sure that the error comes from the unv file. so my question is : is it the unv fomat file ''dataset 164'' that causes this error? if yes what dataset should be used ' dataset 15, 18, 55, 58, 82 or 151? if there is any other suggestion i'm all ears. and thank you in advance for all your replies
  8. hello, im doing a model correlation between an experimental results stocked in a UNV file, and a numerical simulation run using optistruct while loading both results from the UNV file and the h3d i have a message the said << Node block 2411 or 15 or 781 does not exist >>. this error comes from the UNV file and i don't know how to fix it. thank you for your help!
  9. Hello, I am doing a NVH optimization and facing a problem when setting the frequency response. As asked by the Optistruct, i need a specific mode number for response setting. However, it is just a topology optimization which still in the very beginning of concept design. I do not know which mode is the one I need. For the EIGRL, I picked from 1 to 60 hz with 10 exporting mode. So my question is which mode should I leave to the response?
  10. Is it possible to do operational Modal Analysis in optistruct?
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