
143Equivalent Circuit Method
piezoelectric segment; Z
m
the mechanical impedance, containing
mechanical inductance L
m
= 2πaA
lam
(
= n
m
+ (1-n
p
and n =2A
m
/A
lam
), mechanical compliance as
, and
mechanical resistance) as
, where ω
0
(ω
0
=
and
) is the free angular resonance frequency of
the laminated ring, and Q
m
is the mechanical quality factor of
the laminate.
A combined magneto–(elasto)–electric equivalent circuit for the
C–C mode (assuming no external load) can be developed, as given
...