Force Transmissibility

Other than motion transmissibility, we can also determine the force transmissibility of a dynamic system. In this case, our analytical model needs to simulate the forced vibration of a damped system case, and we should focus on the equilibrium at the system-to-ground connection.

Same as the case where motion excitation takes place, the force transmissibility equals to one when the value of frequency ratio is either zero or square root of two. In any case, it is desirable to have transmissibility below one to avoid the amplification of excitation after it reaches the opposite end of the system.

The following shows the derivation of force transmissibility. Watch the video above for full details.