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Sounds like a complicated setup... do you know of any reason you'd want to call out a threaded feature this way?

I took a GD&T class from where we were taught to think of inspection and fabrication when dimensioning our parts, not necessarily only function. I think this went a long way to help me become a better design engineer. Understanding how the parts were made and inspected is not something I learned...

I was asked to review a dwg that uses runout to control a threaded feature. This is not something I've ever seen before and can't find any use cases where runout is the proper control to use. Is there a case where you'd want to use runout on a threaded feature? If not, what's the argument...

Hi all, started using emacs and am now really wanting to have a Nastran mode. There's a few references to a nastran-mode in version 23, but the version I tried, and my current install of 24.1, don't have it. Anyone know anything about it? Thanks

I hadn't thought about a response to a small perturbation before, I'll think about it and see if it could work. For the strucutre, I'm thinking more about truss type structues where each joint can support some number of struts connected to it. For example, a joint could have six struts...

I could probably add some learning in there, but I'll keep it simple at first and stick to more of a rule based approach. I haven't found too many examples out there where they try something like this. Most of the self-assembly and self-reconfiguration stuff assumes that the structure is...

I'll stay away from the questions you posted at the end. :) For now I want to look at giving a final configuration that may be unstable at intermediate stages of the build, and have the robot figure out the build path so that the final assembly can be achieved. And you're right, at any stage...

yeah, what I'd like to look at is robots that are capable of building certain types of structures autonomously, given the end configuration. So incrementally adding pieces to the structure until it is complete. I'm thinking about modeling each possible next step as a small load at the...

the system should be linear. right now I'm trying to look at strucutres that I can represent with beam elements, so am mostly worried about the moments at all the joints (beam element ends) and the moments at my reaction points. I can easily throw out cases where the moment exceeds certain...

That's the part I'm struggling with I guess... how to measure the change. My initial thought is to just sum the magnitude of the difference between the elemental results or my reaction forces for {structure+applied loads} and each {structure+applied loads+small loads} and select the one with...

What I'm looking at is this: Given a structure and a set of applied loads, I have a number of subcases where small loads are applied at different places on the structure. These "small loads" are small when compared to the given applied loads, which will be present in each subcase. If my first...

Hey Mark, I realize this is an area that hasn't been fully implemented in NX, but this is the format I was given to work with so need to find a work around. To that end, I think I'm almost there... In this thread I'm looking at making an Abaqus script to add a step to the ODB file and change...

So I wrote the following script to test changing the 'RS' result set to an 'S' result set. It appears to work when looking at the console window, but my pre/post processor doesn't recognize that an additional step has been added. Do I need to change something else in the ODB file for this...

here's the files I put together for tech support. It's a MD nastran example from the Dynamic Analysis User's Guide made in Abaqus 6.9.1. Note, only RMS type outputs are requested in the *.inp...

Hi all, I've got a rather large abaqus 6.9.1 model with a random response analysis. I do not have CAE, and the pre/post processor that I do have (NX 7.5 or I-DEAS 6) will not recognize the output variables from the output decks (RS, RE, RU, etc). I'm wondering if it would be possible to...

Hi all, I'm trying to import some Abaqus results into NX 7.5 The model I'm working with is a random response done in Abaqus 6.9.1, and NX 7.5 does not recognize the root mean squared results sets (RS, RE, RU, RV, RA, etc). Since I don't have access to Abaqus/CAE, I'm not sure how I can view...

Hi all, I'm trying to learn how to use the *Modal Dynamic and *Steady State Dynamics solutions. My trouble is that I can't figure out the proper way to apply damping. For a test case I've got a spring mass damper system: M=10kg k=49 N/m c=3 N-sec/m x(0)=0 v(0)=0 F(t)=20cos(4t) N Steady State...

Forgot to mention that I'm trying to use the Form Field in the Mesh Associated Data. the equation for my thickness, based on the X & Y coordinates, has squared terms for the X and Y variables and gives me a dimension error when I try to enter in: ug_var("x")^2 but works fine when just adding...

The object I am trying to mesh has a thickness that varies in X and Y, I'm looking to enter this equation into the properties somehow so that I don't have to manually specify the thickness. Currently I have to export the *.dat file, edit with excel to get the right thickness, then run the file...

Reference: thread554-212113 A while back I had the need to create a custom BOM output. Now that the need has come back, the methods referenced in the linked thread don't seem to work anymore. Have there been changes to this option in WF4? I can't seem to find anything in the help to indicate...