Friction generated between an outer surface of the plate and undersides of {TAIL ~ the adjacent shrouds} reduces {HEAD ~ undesirable vibrations} in the airfoils  
Friction generated between an outer surface of the plate and undersides of { TAIL ~ the adjacent shrouds } reduces { HEAD ~ undesirable vibrations } in the airfoils
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH