Measures of Energy Dissipation

Assume that the piston is subjected to a harmonic movement

Then, the energy dissipated per cycle in the dashpot is given by

	(8.2)

where * denotes the complex conjugate. Using eqns. (8.1) in eqn. (8.2), we get

	(8.3)

Rewriting the harmonic motion x as

	(8.4)

we can express the damping force as

	(8.5)