Dear All,
I am doing modal analysis using ANSYS.
1) why every one is particularly taking first six modes of vibration for their results?. Is the probability of occurance of the first six exitation is very higher?
2) But how the frequencies for first 6modes are in ascending order ?
3) Just for verification, Assume ,
a) the earthquake frequency is around 22 to 25Hz.
b)Obtained natural modes for a system 5,7,8.8,9,10.2.
Hi,
I am looking at some deformations in beams. I have an elastic beam sleeping on another elastic beam and connected via springs that have two dimensional stiffness. Anybody knows how should I go for closed form solution of this beam and obtain deformations in springs??? I can model it in sap2000 or ABAQUS and solve it at there but I am now looking for only closed form solution... Besides, I am looking for deformations in spring caused by applied load. I have attached a sketch of my model. Any idea or comment will be highly appreciated.
I think I have spoken various times of this problem.
In Italy there was today an announcement that we have the biggest such problem in Europe. See here .
When I search in wikipedia, I find various terms.
Is there any research about interfacial adhesion of transferrable monolayers and substrates ? I found it's quite different from the rough surface model, because the monolayer is flexible enough to match the roughness of surface. Can one determine the separation value from the different roughness of pure substrate and substrate with a monolayer ?
Can someone give me some clue ? Thanks a lot!
I need to apply cyclic thermal load on a layered structure and want to see the stress generated and structural displacement using Ansys. How can I apply cyclic thermal load? iI tried to use Load Step Opts. Since I am interested only in stress-displacemnt, I used structural element. But if i use structural element, it doesn't give me Time/frequency option under load Step. Do i need to use coupled element? Is there any other way to apply cyclic thermal load to see stress-displacement? Thanks!
Hi,
in a clamped bar at one end submitted to tension at the other end, the deformation, as well as stress, is constant while the displacement is linear.So, at the clamped end displacement is null wheras deformation is constant! could anyone explain me this paradoxe?
Thanks a lot.
Hello,
Is there anyone out there that can suggest a suitable subroutine in abaqus for modeling anisotropy. I know about the potential option in abaqus CAE that uses hill`s criteria to define different yield ratios in different directions but the aluminum alloy i`m working with is almost isotrop at yield limit but strongly anisotrop at ultimate tensile stress and in plastic strain . So i need to use a subroutine that takes all these properties into considration.
I appreciate any help
Best Regards
Ali Khajehgani
