Recent content by Dan90

Hi Greg, thank you very much for the reply. I think you are right on the use of the second formula only when the spectrum is expressed in bands. In my opinion this is due to the fact that when I convert a PSD from narrow band to, for example, 1/3 octave bands, the values I get for each band...

Hello to everybody, I am a bit confused about the calculation of an OSPL of a pressure spectrum. From what I learned, I know that the OSPL should be a number describing how much energy is related to the spectrum under consideration. Nothing special so far, but I read about two formulas for its...

Ok guys, to whom it may concern I solve the problem. The issue lay in the PSOLID property format which did not respect what is written in the NX Nastran QRG at page 2220 (Bulk data entries -PSOLID).

Hello to everyone, I am having problems with a eigenvalues analysis. In particular I need to extract the acoustic modes from my model. I have created a fluid material (mat10), specifying all the properties needed, but when I run the analysis the following fatal error appears: *** USER FATAL...

Hi guys, finally I solved my problem extracting each single volume from each part and then merging all the volumes together. Thank you very much for the help!

Unfortunately, I did not solve my problem yet. I will let you know if I solve, but, if you have some other tips, please share them with me.

Dear John, thank you for the awesome video. Anyway I did not solve my problem due to an error message which appears when I try to delete the faces. I have attached a video in which I try to execute the same commands as you did with your part. What do you think is wrong with my...

No, I need to create the airvolume in the image as a body..

In the attached image I use the space finder as suggested by Toost and the filled volume is exactly what I need as a body..http://files.engineering.com/getfile.aspx?folder=3e625817-3be4-41a1-a088-092a094d7306&file=filling.png

Thank you guys for the very quick replies. Excuse me, but maybe I was not able to well explain my real intent. I do not need to just measure the empty volume inside the airbox, but I need to "create" such a volume. First, I brutally closed the structure by means of the extrusions. Then I...

Hi guys, My part consists of an airbox for automotive applications and I need to get the air volume inside it which, of course, is not present as body. Does anyone know a simple way to obtain such an air volume as a body (starting from the airbox)? I have attached an image of the airbox...

But, what does it mean that surface 1138 has no faces? With Femap 11.0.1 I can't simply delete it. Does it mean I will not be able to mesh the whole geometry?

Ok, thank you very much! Here below you can download the geometry. http://files.engineering.com/getfile.aspx?folder=ccde27e9-2f69-4c11-8e1b-afeae5128f93&file=Geometry.prt

Dear blas, as always you are right! Yesterday I found out that when importing a .stp file FEMAP converts it into parasolid. So I tried to export the solid object from NX9 as parasolid file and it seems to be the correct choice. However, after that Femap performs the import operation, a warning...

ok, I solved the problem. The file was correctly exported by NX9 and the problem was, as suggested by robnewcomb, in the import settings for step file. Therefore I tried parasolid and it seems to be the right way. Thank you all!