File: truss_spec.flt

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problem description
title="Spectral Analysis of a Spring" nodes=2 elements=1 analysis=spectral

analysis parameters
beta=0.25  gamma=0.5  alpha=0.0
nodes=[2] dofs=[Tx] mass-mode=lumped
start=0.0 stop=20.0 step=0.2

nodes
1	x=0.0	y=0.0	constraint=fixed
2	x=1.0		constraint=free		mass=10 	force=point

truss elements
1	nodes=[1,2]	material=steel

material properties
steel	A=1.0	E=1000 rho=0.0	Rk=0.0001

constraints
fixed	Tx=c Ty=c Tz=c
free	Tx=u Ty=c Tz=c

forces
point	Fx =  100*cos(40*t - 0.0)

end