Looks like it doesn’t damping?
Help says “… This card must be part of
a material description.” what is not completely clear
For example for previous topic with simple amplitude
Hello, could you plot the input load?
*NODE,NSET=NALL
1,0.,0.,0.
2,1.,0.,0.
3,2,0,0
*ELEMENT,TYPE=SPRINGA,ELSET=ESpring
1,1,2
*ELEMENT,TYPE=B31,ELSET=Emass
2,2,3
*BOUNDARY
1,1,3
2,2,3
3,2,3
*SPRING,ELSET=Espring
768310.
*MATERIAL,NAME=EL
*ELASTIC
2.1e11,.3
*DENSITY
1130
*DAMPING,STRUCTURAL=0.1
*beam section, elset=Emass,material=EL,section=rect
1,1
*AMPLITUDE,NAME=StartAndStop
0,0,1,1,10,1
*TIME POINTS,NAME=T1,GENERATE
0,10,0.005
*step, nlgeom, inc=100000000
*dynamic
0.0001,10,1.0E-08,2.0E-03
*CLOAD,AMPLITUDE=StartAndStop
3,1,213184
**Displacements
*node file,timepoints=T1
u
*endstep
Structural damping should be used only in SSD analyses:
This card is used to define Rayleigh damping for implicit and explicit dynamic calculations (*DYNAMIC) and structural damping for steady state dynamics calculations (*STEADY STATE DYNAMICS).
1 Like
Not sure if input is same as in your previous post…*dynamic - weird results - #11 by JuanP74
yes, it is the same thing, but different amplitude.
So, as far as it is true, the only way to use Rayleigh
Yeah, in Abaqus this type of damping is also supported only in a few linear dynamics procedures. The problem is that CalculiX doesn’t warn about an incorrect usage of this keyword.