Reply To: changing timoshenko beam theory into euler theory

[peteroznewman]

I was able to count the sinusoids in the deformation plots that only go up to mode 24.  I don't know how many sinusoids there are at mode 55 but it's probably less than 83 so yes, the element count per sinusoid is probably fine.  It was a potential source of error when I didn't know the element count.

The consistent mass matrix is more accurate.  The lumped mass matrix is more efficient to compute solutions to dyanamic analyses.