type('137.inp')
*HEADING
 VERIFICATION OF ABAQUS FLUID CAVITY VOLUME OUTPUT TO MATLAB (CVOL, RECORD KEY 137)
*RESTART, WRITE, FREQ=1
*NODE, NSET=CAV1NOD
 1, 1., 1., 1.
 2, 2., 1., 1.
 3, 2., 2., 1.
 4, 1., 2., 1.
 5, 1., 1., 0.
 6, 2., 1., 0.
 7, 2., 2., 0.
 8, 1., 2., 0.
*ELEMENT,TYPE=SFM3D4,ELSET=STRUCTURE
 1, 2, 3, 7, 6
 2, 3, 4, 8, 7
 3, 6, 7, 8, 5
*SURFACE SECTION, ELSET=STRUCTURE
*SURFACE,TYPE=ELEMENT,NAME=CAV1
 STRUCTURE, SPOS
*PHYSICAL CONSTANTS, ABSOLUTE ZERO = 0
*FLUID CAVITY, NAME=CAVITY1, BEHAVIOR=FLUID, SURFACE=CAV1, REFNODE=1
 1.0
*FLUID BEHAVIOR, NAME=FLUID
*FLUID DENSITY
 10.,  
*ELEMENT, TYPE=SPRING1, ELSET=SPRINGX1
 21, 2
*SPRING, ELSET=SPRINGX1
 1, 
 400., 
*ELEMENT, TYPE=SPRING1, ELSET=SPRINGY1
 42, 4
*SPRING, ELSET=SPRINGY1
 2, 
 1.E-6,
*BOUNDARY
 2, 2, 3, 0.0
 3, 3, 3, 0.0
 4, 1, 1, 0.0
 4, 3, 3, 0.0
 5, 1, 3, 0.0
 6, 2, 3, 0.0
 7, 3, 3, 0.0
 8, 1, 1, 0.0
 8, 3, 3, 0.0
*EQUATION
 2, 
 3, 1, 1.0, 2, 1, -1.0
 2, 
 6, 1, 1.0, 2, 1, -1.0
 2, 
 7, 1, 1.0, 2, 1, -1.0
 2, 
 3, 2, 1.0, 4, 2, -1.0
 2, 
 7, 2, 1.0, 4, 2, -1.0
 2, 
 8, 2, 1.0, 4, 2, -1.0
*NSET,NSET=REFNODE
 1,
*STEP, NLGEOM
*STATIC
 .2, 1.
*CLOAD
 4, 2, -600.
*FILE FORMAT, ASCII
*NODE FILE
 CVOL
*END STEP