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I've given some more thought to my problem and realized the above approach will not work, because it will not properly account for motion-dependent stiffnesses (e.g., centrifugal stiffness). The only other approach I can think of is to continuously stop and re-initialize the analysis at each...

I'm using ANSYS 9.0 to model the deformations of a flexible, rotating wing subject to inertial loads caused by the rotational motion. I have been using the full nonlinear TRANS solver successfully. I'd now like to run the same simulation using the mode-superposition solver and compare the...

In ANSYS 9, I have a FEM of a thin membrane (in the X-Y plane) undergoing transient deflections. I've been using PATH commands to output the out-of-plane membrane displacements (i.e., UZ) on various cross-sections of the membrane. Now I need to get the velocities and accelerations of the...

I have the same issue. While running a loop in batch mode, I get a Verify window during each loop. I don't want to have to click "Yes" every time! More detail: I am trying to export path data for multiple load steps. The basic functionality is: [Define path and output file] *DO,i,1,NLOADS...

Thank you. I have another question, but I think it'd probably be more appropriate for a new thread. Nick

This seems like a really easy question, but I haven't been able to find a good answer. It's probably too easy to warrant mention, but I'm still new to ANSYS and am kind of lost. How can I draw a smooth line based on a known parametric function? I want to draw a line (x,f(x)) where f(x) = C *...

Yes, you understood my problem correctly. I'll have a look at APDL. Thank you.

Hi, I'm relatively new to ANSYS and I'm looking for advice on calculating the forced, periodic response of a nonlinear structure. I'm using ANSYS 9.0. Specifically, I'm dealing with the inertial loading of a flapping wing subject to periodic imposed flapping motion (via OMEGA, DOMEGA, and ACEL...

That partially worked. I can open the file now, but can't save it once it's open. Instead, I now get the error message: The saved model file cannot be associated with the specified project because its file system path name, which is as follows: C:\I-DEAS\foo.mf1 is already used for the...

I was using I-DEAS NX 11 when I lost my connection to the network. The program shut down because it couldn't contact the license server. Apparently, the current project wasn't closed when I-DEAS shut down, because when I try to re-open the model file now that my network connection is restored...

Nick here again; I'm still stuck on how to get the modal stiffnesses. The most I look at it, the more it seems that I-DEAS doesn't have the capability to calculate modal stiffnesses (at least not with the Lanczos modal solver I'm using), but that can't be right, can it? I'm not familiar with...

I've just started using the FEA capabilities of I-DEAS 11 NX to do normal mode analyses of plates. I'm proficient enough to set up the model, perform the normal mode analysis and output some N mode shapes to the .LIS file. What I also need to do is print out the entries of the N-by-N modal...