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Axial stress on both sides of plate

Posted 29 sept. 2020, 01:20 UTC−4 Structural & Acoustics, Geomechanics, Structural Mechanics 2 Replies

Rana Raza Mehdi
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Hi, I am solving problem for tensile stress in plate in which natural frequency changes by applying stress along x-axis on both sides of plate.

I am giving floquet periodicity on both sides of x-axis and giving boundary loads on both sides of x-axis in terms of total force. When I compute eigenfrequency analysis it gives me error.

If I fix 1 side of plate for constraints then problem changes because I want stress on both sides. Suggest me how to how to solve such kind of problem. Thanks.

2 Replies Last Post 5 oct. 2020, 01:36 UTC−4
T Y
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Posted: 4 years ago 29 sept. 2020, 05:21 UTC−4

Dear Raza,

From my understanding, you want a prestressed eigenfrequency solution, this is a stationary solver followed by an eigenfrequency solver. It is inbuilt in COMSOL.

If you give boundary loads on both sides of the plate using a force, this will solve in the stationary study then input into the eigenfrequency solver. What are your boundary conditions? A plate 2 sides fixed and other 2 have the force applied to them? From your query it is hard to understand why you have floquet periodicity.

Kind regards, TY

Dear Raza, From my understanding, you want a prestressed eigenfrequency solution, this is a stationary solver followed by an eigenfrequency solver. It is inbuilt in COMSOL. If you give boundary loads on both sides of the plate using a force, this will solve in the stationary study then input into the eigenfrequency solver. What are your boundary conditions? A plate 2 sides fixed and other 2 have the force applied to them? From your query it is hard to understand why you have floquet periodicity. Kind regards, TY
Rana Raza Mehdi
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Posted: 4 years ago 5 oct. 2020, 01:36 UTC−4

Hi sir, My plate is free from both sides (x-axis ) and I am giving load from both sides as well but it gives error because I am not giving any constraints that's why I fixed it from 1 side.

So, actually I want to simulate plate which is free from both sides and I give boundary load from both ends. Is there any boundary condition which I can apply here?

Thanks.

Hi sir, My plate is free from both sides (x-axis ) and I am giving load from both sides as well but it gives error because I am not giving any constraints that's why I fixed it from 1 side. So, actually I want to simulate plate which is free from both sides and I give boundary load from both ends. Is there any boundary condition which I can apply here? Thanks.

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