vibrataion isolation
vibrataion isolation
(OP)
Hi guys
I would very much appreciate if someone can help me answer this question. In sdof vibration isolation system with very stiff spring does the system still resonate at the resonant frequency region even if the disturbance force is very small
Many Thanks
Tim
I would very much appreciate if someone can help me answer this question. In sdof vibration isolation system with very stiff spring does the system still resonate at the resonant frequency region even if the disturbance force is very small
Many Thanks
Tim





RE: vibrataion isolation
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: vibrataion isolation
Kind Regards
Hatim
RE: vibrataion isolation
RE: vibrataion isolation
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: vibrataion isolation
A force that can oppose the external forcing function at resonance is proportional to the first time derivative of the displacement.
This is completely regardless of the stiffness of the 'spring' as the others point out.
Fe
RE: vibrataion isolation
The magnitude of disturbance fore applied at the top of the system (i.e mass) is about 100N and spring stiffness is 1.4212e+005N.s/m which means my resonance is at 12Hz. Not sure whether this force is enough to make the mass moves buy few mms at 12Hz (i.e. displacement of mass).
Kind Regards
Tim
RE: vibrataion isolation
RE: vibrataion isolation
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: vibrataion isolation
RE: vibrataion isolation
F=x*2*pi*f*d where d is the damping and x is the maximum displacement, for lightly damped systems at resonance, at a guess. The proper equation is in the book you took the picture from, no doubt.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: vibrataion isolation
M
--
Dr Michael F Platten
RE: vibrataion isolation
I agree. This is a great suggestion.
To the OP:
This is known as semi-active vibration isolation.
A nonlinear stiffness is also sometimes designed to take advantage good properties in certain regions.
To date, best results (research and practice) have been from a combination of passive and active.
Fe
RE: vibrataion isolation
Without this info you don't have much.
Fe
RE: vibrataion isolation
Kind Regards
Tim