Free motions of viscously damped linear systems are studied. A heavily damped multi-degree-of-freedom system is defined as one for which all its eigenvalues are real, negative, and semi-simple. Several results are obtained which state conditions for the heavy damping of the system. The conditions are given directly in terms of the coefficients of system matrices and these conditions may yield design constraints in terms of the physical parameters of the system. An example illustrates the validity and usefulness of the presented results.

1.
Inman, D. J., 1989, Vibration With Control, Measurement, and Stability, Prentice-Hall, Englewood Cliffs, NJ.
2.
Duffin
,
R. J.
,
1955
, “
A Minimax Theory for Overdamped Networks
,”
Journal of Rational Mechanics and Analysis
,
4
, pp.
221
233
.
3.
Lancaster, P., 1966, Lambda-Matrices and Vibrating Systems, Pergamon Press, Oxford, UK.
4.
Inman
,
D. J.
, and
Andry
, Jr.,
A. N.
,
1980
, “
Some Results on the Nature of Eigenvalues of Discrete Damped Linear Systems
,”
ASME J. Appl. Mech.,
47
, pp.
927
930
.
5.
Barkwell
,
L.
, and
Lancaster
,
P.
,
1992
, “
Overdamped and Gyroscopic Vibrating Systems
,”
ASME J. Appl. Mech.,
59
, pp.
176
181
.
6.
Bhaskar
,
A.
,
1997
, “
Criticality of Damping in Multi-Degree-of-Freedom Systems
,”
ASME J. Appl. Mech.,
64
, pp.
387
393
.
7.
Beskos
,
D. E.
, and
Boley
,
B. A.
,
1980
, “
Critical Damping in Linear Discrete Dynamics Systems
,”
ASME J. Appl. Mech.,
47
, pp.
627
630
.
8.
Bulatovic
,
R. M.
,
1997
, “
The Stability of Linear Potential Gyroscopic Systems When the Potential Energy has a Maximum,” (in Russian)
Prikl. Mat. Mekh. (PMM),
61
, pp.
385
389
.
9.
Bulatovic
,
R. M.
,
1997
, “
On the Lyapunov Stability of Linear Conservative Gyroscopic Systems
,”
C. R. Acad. Sci.
324
, pp.
679
683
.
10.
Lancaster
,
P.
, and
Zizler
,
P.
,
1998
, “
On the Stability of Gyroscopic Systems
,”
ASME J. Appl. Mech.,
65
, pp.
519
522
.
11.
Belman, R., 1970, Introduction to Matrix Analysis, McGraw-Hill, New York.
12.
Walker
,
J. A.
,
1991
, “
Stability of Linear Conservative Gyroscopic Systems
,”
ASME J. Appl. Mech.,
58
, pp.
229
232
.
13.
Korn, G. A., and Korn, T. M., 1961, Mathematical Handbook for Scientists and Engineers, McGraw-Hill, New York.
You do not currently have access to this content.