Reply To: Mesh effect stiffness

[Deepak]

 

Hi,

The frequency is influenced by stiffness, which in turn is determined by the size of the element. This is particularly important when the model is thin and subject to bending. Increasing the number of elements through the thickness improves the accuracy of the bending stiffness calculation. Higher modes involve complex mode shapes (subject to bending), which makes mass density dependency more at higher modes.

The following article may be helpful in this context:

Why does the mesh size affect my modal analysis results?

Modal analysis. Results differ significantly depending on mesh size

Thanks,
Deepak