[SOLVED] Mesh dependency in Modal Analysis

#---------------------------------------------------------------------------------------
# Author: 	menb
# Date: 18.11.15
#
# UNITS: 	MASS	LENTH	TIME	FORCE	STRESS	ENERGY
# 			ton 	mm 		s 		N 		MPa 	N-mm
#---------------------------------------------------------------------------------------



DEBUT(LANG='en',);

#---------------------------------------------------
# MESH
#---------------------------------------------------

mesh=LIRE_MAILLAGE(	FORMAT='MED',									# read in string						
						UNITE=21,
						INFO=1,);
   

#---------------------------------------------------
# MODEL
#---------------------------------------------------

model1=AFFE_MODELE(MAILLAGE=mesh,										# define the model
                   AFFE=_F(TOUT='OUI',
                           PHENOMENE='MECANIQUE',
                           MODELISATION='3D',),);
						

#---------------------------------------------------
# LOAD AND BC
#---------------------------------------------------

BC=AFFE_CHAR_MECA(MODELE=model1,										
                  DDL_IMPO=(_F(GROUP_MA=('fix',),						
                               DX=0.0,
                               DY=0.0,
                               DZ=0.0,),),);
                               
CuBe2A=DEFI_MATERIAU(ELAS=_F(E=210000.0,								
                             NU=0.3,	
                             RHO=7.8e-09,
                             ALPHA=0.01,),);



matfield=AFFE_MATERIAU(MAILLAGE=mesh,
                       AFFE=_F(TOUT='OUI',
                                MATER=CuBe2A,),
	);
                                    
                                    
ASSEMBLAGE(MODELE=model1,
           CHAM_MATER=matfield,
           CHARGE=BC,
           NUME_DDL=CO('NUM'),
           MATR_ASSE=(_F(MATRICE=CO('Stiffn'),
                         OPTION='RIGI_MECA',),
                      _F(MATRICE=CO('Mass'),
                         OPTION='MASS_MECA',),
                      _F(MATRICE=CO('Damping'),
                         OPTION='AMOR_MECA',),),);


#---------------------------------------------------
# MODAL SOLVER 
#---------------------------------------------------

reig0000=CALC_MODES(OPTION='BANDE',
                    SOLVEUR_MODAL=_F(METHODE='SORENSEN',),
                    MATR_RIGI=Stiffn,
                    MATR_MASS=Mass,
                    CALC_FREQ=_F(FREQ=(0.0,30000.0,),),
                    VERI_MODE=_F(STOP_ERREUR='NON',),
                    AMELIORATION='NON',);



IMPR_RESU(FORMAT='MED',
          UNITE=80,
          RESU=_F(RESULTAT=reig0000,),);



FIN();