Page 30 - Singiresu S. Rao-Mechanical Vibrations in SI Units, Global Edition-Pearson (2017)

LISt oF SyMBoLS 27

Symbol Meaning SI Units

[l] transformation matrix
#
m viscosity of a fluid kg>m s
m coefficient of friction
m x expected value of x
r mass density kg /m 3
h loss factor
s x standard deviation of x
s stress N/m 2
t period of oscillation, time, time constant s
t shear stress N/m 2
w angle, phase angle rad
w i phase angle in ith mode rad
v frequency of oscillation rad/s
v i ith natural frequency rad/s
v n natural frequency rad/s
v d frequency of damped vibration rad/s

Subscripts

Symbol Meaning

cri critical value
eq equivalent value
i ith value
L left plane
max maximum value
n corresponding to natural frequency
R right plane
0 specific or reference value
t torsional