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Hello forum, our customer, a manufacturer of two-stroke engines, has asked us to perform a dynamic analysis af an electro-mechanical device mounted on their engines. For this purpose, they have placed some accelerometers on the mounting locations of the equipment and recorded the acceleration...

Hello all. I would like to know what is your experience on the subject. I am doing some tests and I am struggling with heavy limitations and problems of convergence. Any of you wants to share his experience on the matter? Thanks, regards. 'Ability is 10% inspiration and 90% perspiration.'

Hi pals. In my job I have often to cope with composite configuration for which the usual modelling with 2-D CLT models are pushing the limit... as far as you know, is there some commercial software or modelling technique allowing to model composite structures with their full layup, for example...

Hi pals, any of you can suggest me where one can find documentation on the use of Superelements in NASTRAN? I have no possibility of attending the pertaining seminar, so any help will be greatly appreciated. Cheers. Spirit P.S.: I posted the question also on the MSC NASTRAN Software Forum...

Hi pals, any of you can suggest me where ona can find documentation on the use of Superelements in NASTRAN? I have no possibility of attending the pertaining seminar, so any help will be graetly appreciated. Cheers. Spirit 'Ability is 10% inspiration and 90% perspiration.'

Hi pals. I have to connect two solids meshed independently from each other, but that are connected in reality. The nodes on the joined surface are not coincident, save for some lucky coincidence. Any of you can suggest which type of NASTRAN elements can be used to produce a realistic connection...

Hi pals. I am having non-zero frequencies for the rotational rigid body modes of a FEM built with solid parabolic elements, while the translational RB modes are OK. Any of you has an idea of where these frequencies can come from? Can I expect uncertainties in evaluating the stiffness...

Hi pals, any of you has previous experiences in performing impulse modal testing WITHOUT using an instrumented hammer, interpreting the modes directly from the accelerometers signals? I guess this is a kind of 'extreme sport' in modal testing, but that's it... Thanks, bye Spirit 'Ability is...

Good morning everybody. Anyone can give me a clear explaination of why MSC guys have changed the default value of SNORM parameter from 0.0 to 20.0 switching from release 70.7 to 2001 [surprise]? Thanks, bye. 'Ability is 10% inspiration and 90% perspiration.'

Good morning everybody. Anyone can give me a clear explaination of why MSC guys have changed the default value of SNORM parameter from 0.0 to 20.0 switching from release 70.7 to 2001 [surprise]? Thanks, bye. Spirit 'Ability is 10% inspiration and 90% perspiration.'

Good morning all. Any of you has experienxed error in evaluating the torsional stiffness of FEMs using offset shell elements with NASTRAN version up to 70.7? Greetings. Spirit 'Ability is 10% inspiration and 90% perspiration.'

Hi all, I am in troubles with PATRAN. I need to read a .op2 file of huge size (> 4 GB), and PATRAN isn't even able to see it in the file selection window. Since the run to generate it takes too long, how can I override this inconvenience? Thanks , bye. Spirit 'Ability is 10% inspiration and...

Hi all, I am rather new at Composites, so I would be grateful to anybody who could tell me some titles of books on the topic (there are a lot, that is the problem). A site with similar resources would be greatly appreciated as well. Thanx. 'Ability is 10% inspiration and 90% perspiration.'

Hi all. I just wanted to make some considerations. Few weeks ago I had the opportunity to participate to the MSC User Conference in Toulouse. Among the keynote speakers was Sam Venneri from NASA, who escorted the participants through an overview of the future challenges of the american...

Hi pals, I need your advice. I have to handle VERY big output files from NASTRAN (.op2). Using I-DEAS is out of discussion since it does not work. Anyone can suggest me some post-processing package able to handle such huge outputs? I hope the question is not inappropriate for this forum. Greetings.

What is the minimum required hardware for performing a reliable impact modal test (hammer test)? Can I desume modal shapes without using post-processing software and so on?

Hi all. Any of you has experience about how to model bolts to connect different parts of a solid FEM? Thanx for answering.

Hi pals, here is my problem. We are considering modeling a complicated structure (different thicknesses) with solid elements (NASTRAN solver). We would be oriented towards bricks, but the difficulties in meshing our geometry in this fashion seem to be too big. We are thus considering using...

hi all, i am a newbie at this site. I have a question: we are testing a mechanical equipment to operative life fatigue using the PSD recovered during normal work. My question is: having to verify the reliability over all the lifecycle of the equipment, is it possible to test the item only to a...

Hi there.. I am undertaking a project about the vehicle interior noise from the structure vibration point of view. I have searched the internet to find as many related information about this topic as i can but no luck. Could you please help me in this issue to guide me for the best websites in...