NASTRAN FILES=NPTP                                                              
ID    T04021A,NASTRAN                                                           
DIAG   14                                                                       
TIME   10                                                                       
CHKPNT YES                                                                      
APP    DISP                                                                     
SOL    4,6                                                                      
ALTER  2,2 $                                                                    
ALTER  91 $                                                                     
CHKPNT   KDGG $                                                                 
EXIT $                                                                          
ENDALTER $                                                                      
CEND                                                                            
TITLE    = HYDROELASTIC ULLAGE PRESSURE, DIFFERENTIAL STIFFNESS PROBLEM         
SUBTITLE = NASTRAN TEST PROBLEM NO. T04-02-1A                                   
$ REFERENCE PROBLEM III.1                                                       
SPC  = 10                                                                       
LOAD = 10                                                                       
DISP = ALL                                                                      
SUBCASE 1                                                                       
  LABEL = STATIC SOLUTION                                                       
SUBCASE 2                                                                       
  LABEL = DIFFERENTIAL STIFFNESS SOLUTION                                       
BEGIN BULK                                                                      
CQUAD2  101     100     101     102     106     105                             
CQUAD2  102     100     102     104     108     106                             
CQUAD2  103     100     104     103     107     108                             
CQUAD2  104     100     101     103     104     102                             
GRID    101             0.0     0.0     0.0                                     
GRID    102             6.0     0.0     0.0                                     
GRID    103             0.0     12.0    0.0                                     
GRID    104             6.0     12.0    0.0                                     
GRID    105             0.0     0.0     12.0                                    
GRID    106             6.0     0.0     12.0                                    
GRID    107             0.0     12.0    12.0                                    
GRID    108             6.0     12.0    12.0                                    
MAT1    100     10.6+6          .3      .92-3                                   
PLOAD2  10      1.0     101     THRU    104                                     
PQUAD2  100     100     .06                                                     
SPC1    10      12356   101     103     105     107                             
ENDDATA                                                                         
