Impulse respose using transient analysis

[hnng]

Hi,

I am trying this simple example of a cantilever beam. I want to obtain the impulse response of the structure and have the following APDL script. I should get a harmonic response, what I get is a ramp.

I will appreciate if someone can point to my mistake.
=======================================================
finish
/clear

/PREP7 ! Enter preprocessor
K,1,0,0 ! Keypoints
K,2,1,0
L,1,2 ! Connect keypoints with line

ET,1,BEAM3 ! Element type
R,1,0.0001,8.33e-10,0.01 ! Real constants

MP,EX,1,2.068e11 ! Young's modulus
MP,PRXY,1,0.33 ! Poisson's ratio
MP,DENS,1,7830 ! Density

LESIZE,ALL,,,10 ! Element size
LMESH,1 ! Mesh the line

FINISH

!-----------------------------------------------------------
/SOLU ! Enter solution phase

ANTYPE, TRANS ! Transient analysis

D,1,ALL
TIME,1e-6
TIMINT,OFF
SOLVE

!At time equals 0.001s
TIME,0.001 ! Sets time to 0.001 seconds
KBC,1 ! Ramped load step
F,2,FY,-100 ! Load right end
TIMINT,ON
SOLVE

!At time equals 1s
TIME,1 ! Sets time to 1 second
KBC,1 ! Ramped load step
F,2,FY,0 ! Load right end
TIMINT,ON
SOLVE


FINISH

!-----------------------------------------------------------

/POST26 ! Enter time history

NSOL,2,10,U,Y, UY_2 ! Calls data for UY deflection at node 2
STORE,MERGE ! Stores the data
PLVAR,2, ! Plots vs. time
==================================================================

HN