*HEADING
  TEST SUBSTRUCTURE ALPHA AND BETA DAMPING FOR DIRECT INTEGRATION  
  SUBSTRUCTURE GENERATION USED IN THE ANALYSIS rayleighdamping_substr.inp
**
*NODE
1,0.,0.
2,10.,0.
*ELEMENT,TYPE=T3D2,ELSET=TRUSS
1,1,2
*SOLID SECTION,ELSET=TRUSS,MATERIAL=MTRUSS
1., 
*MATERIAL,NAME=MTRUSS
*ELASTIC
1E7, 
*DENSITY
317., 
*DAMPING,ALPHA=1.00472,BETA=1.59248E-3
**
**
*STEP
*SUBSTRUCTURE GENERATE,TYPE=Z1,MASS MATRIX=YES,VISCOUS DAMPING MATRIX=YES,OVERWRITE
*RETAINED NODAL DOFS
1,
2,
*END STEP