Inertance vs Transmissibility
Inertance vs Transmissibility
(OP)
Hi
Inertance and Transmissibility are both two FRF's.
Is there a relationship between these two functions?
I was wondering whether the following equation was right
Y12/Y11=T12 where Y is the inertance and T is transmissibility.
Regards
Amanuensis
Inertance and Transmissibility are both two FRF's.
Is there a relationship between these two functions?
I was wondering whether the following equation was right
Y12/Y11=T12 where Y is the inertance and T is transmissibility.
Regards
Amanuensis





RE: Inertance vs Transmissibility
According to forum member Tom Irvine at
http://www.cs.wright.edu/~jslater/SDTCOutreachWebs...
Inertance = Acceleration / Force
According to Shock and Vib Handbook:
Transmissibility is the nondimensional ratio of the response amplitude of a system in steady-state forced vibration to the excitation amplitude. The ratio may be one of forces, displacements, velocities, or accelerations.
Y12/Y11=T12... I guess you are talking about a matrix form?
Let's say
Y12 = A2/F1 where A is accel and F is force
Y11 = A1/F1
Y12/Y11 = (A2/F1) / (A1/F1) = A2/A1
Yes, that looks to be the transmissibility to me
The units work out also (it is dimensionless like transmissibility)
=====================================
(2B)+(2B)' ?
RE: Inertance vs Transmissibility
Otherwise we would get a different transmissibility I think.
=====================================
(2B)+(2B)' ?
RE: Inertance vs Transmissibility
I can briefly describe my issue. I have to find the transmissibility between two points of a structure (T12=A2/A1). For this, I have a model from which I have modes, that is resonance frequencies and modal displacements at the points 1 and 2.
From these data (plus a damping loss factor), I can carry out a modal synthesis. It allows me to get merely inertance, either direct inertance (Y11) or transfer inertance (Y12).
So, it is the reason why I would like to know if transmissibility can be deduce from the two inertances Y11 and Y12.