Zynerji wrote: ↑18 Jul 2021, 01:23
... to remove first and second order harmonics.
Could it be as (relatively) simple as a cutout in the H beam for a type of tuned mass damper?
clearly not
the 'first and second order harmonics' (does the poster mean 1st/2nd order or 1st/2nd harmonics ?) are ....
time-varying inertia forces caused by fixed time-variations of velocities built-in to the fixed geometric cycle
a damper within that system won't cancel or significantly attenuate them ..... (dampers work on free vibrations)
some counterbalancer external or internal to that system could cancel them - by generating 'equal-and-opposite' forces
yes in principle this might be an active eg electromagnetic or electrostatic (ie piezoelectric) device ....
which might also act as a damper
a passive eg tuned mechanical counterbalancer device in the rod might be of some use - but is frequency-specific
TMDs mostly damp free higher-harmonic torsional vibrations of the crankshaft - unrelated to the topic matter