摘要 |
<p>The method involves deriving the relative torsion angles between a connected part (2) and a seismic rotating mass (3) from the time-synchronously measured rotation angles of the two parts (2,3), and then determining the angular accelerations of the seismic rotating mass, taking account of any changes in the angular speed of the connected part. The pre-defined moment of inertia of the seismic rotating mass is used to calculate the torsional stiffness and torsional damping parameters.</p> |