Thank you timmay
I've done the two tests experimentally and I got reduction in zeta to bout 50%. However I'm looking for a mathematical proof explaining this reduction.
Thank you Timmay
What I have is reduction in mass and stiffness but the damping c will decreases accordingly. So zeta and c are not fixed and unknown.
Zeta can be found if the initial displacement, the final displacement and the time difference. Therefore for both cases if we started with...
If I have mass-spring system with certain damping factor, what is the expected reduction in the damping if the mass is reduced by 25% and the spring stiffness by 50%? It is clear that the damping will decrease but how much? can anyone helps me in that?