$ FILE ortx101.dat
DIAG 8,15
SOL 110 $ MODAL COMPLEX EIGENSOLUTION
INCLUDE 'SSSALTERDIR:ortx10a.alt'
CEND
TITLE = VERIF. PROBLEM.  CMPLX. EIG. OF three DOFs WITH SPC  ortx101
SUBTITLE = VARIATION WITH K4 DAMPING
SPC = 1
METHOD = 1
CMETHOD = 10
DISP(PHASE) = ALL
SDISP(PHASE) = ALL
SPCF(PHASE) = ALL
ELFORCE(PHASE) = ALL
SVECT=ALL $ real eigenvalues
m2pp = m2ppx $ add an x2pp term so modal var. get coupled
BEGIN BULK
dmig,	m2ppx,	0,	6,	1	0
dmig,	m2ppx,	2,	0,	,	2,	0,	.1
,	3,	0,	-.1 $
dmig,	m2ppx,	3,	0,	,	3,	0,	.1
SPOINT, 1       2	3,	4,	5 $  SCALAR DOF
CELAS2, 12,     1.0,    1,      ,       2,	,	0.1 
CELAS2, 23,     1.0,    2,      ,       3,	,	0.1 
CELAS2, 34,     1.0,    3,      ,       4,	,	0.1 
CELAS2, 45,     1.0,    4,      ,       5,	,	0.1 
$ UNIT STIFFNESS AND MASS, 0.1 STRUCTURAL DAMPING
CMASS2, 2,      1.0,    2
CMASS2, 3,      1.0,    3
CMASS2, 4,      1.0,    4
CMASS2, 5,      1.0,    5
SPC,    1,      1,      0 $ ENF. MOTION NOT ALLOWED IN SOL 110
EIGRL,  1,      ,	,	10 $ get them all
EIGC, 	10,     HESS,	,	,	,	,	10   
ENDDATA