*HEADING
 : FAX2 FLUID ELEMENT TEST 
(CYLINDER, R=1 H=1, HYDRAULIC, NO BULK MODULUS, NO THERMAL EXPANSION)
*RESTART, WRITE, FREQ=1
*NODE, NSET=CAV1NOD
1, 0., 1.
2, 1., 1.
3, 1., 2.
4, 0., 2.
5, 3., 1.
6, 3., 3.
7, 1., 3.
*ELEMENT, TYPE=CAX4, ELSET=STRUCTURE
  1,  2,  5,  6,  3
  2,  3,  6,  7,  4 
*SOLID SECTION, ELSET=STRUCTURE, MATERIAL=ELAS
*MATERIAL, NAME=ELAS
*ELASTIC
 1.0E-3
*SURFACE,TYPE=ELEMENT,NAME=CAV1
 1, S4
 2, S4
*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=SPRINGR1
21, 2
31, 3
*SPRING, ELSET=SPRINGR1
1, 
400., 
*ELEMENT, TYPE=SPRING1, ELSET=SPRINGZ1
42, 4
*SPRING, ELSET=SPRINGZ1
2, 
1.E-6, 
*BOUNDARY
2, 2, 2, 0.0
4, 1, 1, 0.0
*EQUATION
2, 
3, 1, 1.0, 2, 1, -1.0
2, 
3, 2, 1.0, 4, 2, -1.0
*NSET,NSET=REFNODE
 1,
*STEP, NLGEOM
*STATIC
.2, 1.0
*MODEL CHANGE, REMOVE
 STRUCTURE
*CLOAD
4, 2, -600.
*NODE PRINT,FREQ=100
U,PCAV,CVOL
RF, 
*OUTPUT,FIELD,FREQ=100
*NODE OUTPUT
U,
RF,
*OUTPUT,HISTORY
*NODE OUTPUT, NSET=REFNODE
PCAV,CVOL
*OUTPUT,HISTORY,FREQUENCY=1
*ENERGY OUTPUT,VARIABLE=PRESELECT
*ENERGY PRINT
*END STEP