*HEADING 
 **   *AQUA and *WIND loading tests for B21 elements
 **   MASS ELEMENT ADDED TO CHECK AGAINST v54_159
*NODE,NSET=ALL
1,10., 10.
2,15.,15.
3,20., 20.
4,20.01,20.01
*ELEMENT,TYPE=B21,ELSET=ALL
1,1,3
*ELEMENT, TYPE=MASS, ELSET=MASS
2, 4
*BEAM SECTION,SECTION=PIPE,MATERIAL=A1, ELSET=ALL
1.0,0.05
*MATERIAL,NAME=A1
*ELASTIC
30.0E9,0.3
**A negligible density is added to allow dynamic steps.
*DENSITY
1E-10, 
*MASS, ELSET=MASS
1.0E-11, 
*AMPLITUDE, NAME=TEN
0.,10.,  1.,10.
*AMPLITUDE, name= A1_5
0., 1.5, 1., 1.5
********************* Node sets for loading and B.C.s
*NSET,NSET=support
 all,
*NSET,nset=twist
1,
*Nset,nset=end1
1,
*nset, nset=end2
3,
*********************
*EQUATION
2, 
3, 1, 1., 4, 1, -1.0
2, 
3, 2, 1., 4, 2, -1.0
2, 
3, 3, 1., 4, 3, -1.0
*INCLUDE,INPUT=aqua2d_loads.inp