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natural frequency

Question asked by Adel Taheri Aval on Oct 26, 2015
Latest reply on Nov 4, 2015 by Adel Taheri Aval

hi everyone

im beginner in simulation . i have rotary coupling shaft (that rotate around z axis) and i want to assume natural frequency . my question is which Degrees of freedom must be restricted? my opinion is translating along x,y , z and rotation around x , y axis ( only rotation around z axis must be opened )

is it true?