Re: complex eigenvalue vs transient analysis

Hi Abd. Rahim,
Try to use element type C3D20R which more accurate than C3D8. I have done  
parameter study showed that element C3D8 gives low accurace compared with 
C3D20R.
Good Luck
Ibrahim

"Abd. Rahim" <abdrahim_abubakar@xxxxxxxxx> wrote:


Dear all.

I am studying disc brake squeal. In the past, I used the complex
eigenvalue analysis to predict squeal occurrence. I am also
interested to simulate squeal using dynamic transient analysis. 

In order to compare the two methods, I run an example of deformable
block sliding on the deformable base which is rigidly constraints at
the bottom.The block is sliding at certain velocity. For the complex
eigenvalue analysis, I used first order brick/solid element i.e.C3D8
while C3D8R for explicit(transient analysis). Unfortunately, the
results I got from the two analyses is not well correlated. I assumed
that results from the complex eigenvalue more reliable than the
transient analysis. Does anyone know how to improve it? What are the
criteria to get more accurate results in the transient analysis?

Thanks

Rahim

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ABD. RAHIM ABU BAKAR
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Department of Engineering
The University of Liverpool
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