Search results for query: *

Thanks for all replies... especially for the question from 271828; i had modeled a simple shell cylinder, and applied gravity loads in Z direction. The buckling analysis has delivered negative eigenvalues beside the positive ones. But any torque... for your first suggestion about performing a...

Hi, can anybody suggest me about what can the negative eigenvalues in bucling analysis mean? after having performed a buckling analysis, i got the eigenvalues like: 15.394 -15.397 15.925 -15.934 -16.213 16.223 the structure is geometrically symmetric, but i applied...

Thanks to all for sincere helps. And electricpete, you are right. i was confused in explanation. I got the zero frequency results for the second case (not clamped).

Hi, i have a question about the eigenfrequency analysis. What is indeed the difference between the two eigenfrequency analyses; 1- structure is clamped, 2- structure is not clamped. At first case, i get the first 6 modes equal to 0.0 (rigid body modes). But the 7. mode of analysis for...

you can also get the BODE diagram with adding the command; bode(H); Regards, ridbay

when you play with the equation more, then you will come up with the equation in the end: 3s -------------- (s^2+0.7s+0.1) and if you write the followings in Matlab "Command Window"; >>s = tf('s'); H = (3*s)/(s^2+0.7*s+0.1) you can get the transfer function like: Transfer function...

Is it possible to extract the Participation Factors in all directions (X,Y,Z) and for all nodes in ABAQUS? for instance, when the beam is diveded by 10 linear elements, and has consequently 11 nodes, is it possible to get the PF for each node in each direction? ridbay

Thanks Drej, but i have already rewieved the *ELEMENT MATRIX OUTPUT and implemented the keywords therein... unfortunately i could not get the matrices up to now... Should i write the keywords on "EDIT KEYWORDS" (which can be reached by clicking: Model -> Edit Keywords -> Model_Name)under the...

Hi, everybody is there anybody who knows how to get the MASS and STIFFNESS matrices from the ABAQUS and, maybe let them write down to a file? Thanks in advance, ridbay