SPCD card entry for acceleration input in Modal Transient analysis

Hi,

I am sorry but could you please explain what do you mean by excitation input in SPCD?

Do you mean in TLOADi card?

yes,

TLOAD1 card only

TLOAD1         3      10            ACCE      11

SPCD 10,1,9810

TABLED1 11, ( inputs are in time(s) vs Acceleration (g)

Hi @Murasoli

The TLOAD1 looks fine. You are passing the solver that the load type is acceleration.

SPCD 10,1,9810

if i use this type of input, is that i will get out put acceleration in (g or mm/s^2)

i'm getting stress are very high

if my input in this type

SPCD 10,1,9810

if i use this type of input, is that i will get out put acceleration in (g or mm/s^2)

HI,

It should the unit which you used. 

What about displacements?

Can you add ENFMOTN>>REL card and check the results?

displacement also high only

how this card works (ENFMTON>>REL)

HI,

WIthout ENFMOTN>> REL the displacement and accelerations, etc... are absolute values and stress is calculated based on total displacement

With ENFMOTN>> REL the values will be relative to applied enforced motion

Yes its good, Getting relative Displacement and acceleration

And still stresses were high, As same as without ENFMOTN card

Hi @Murasoli

Are you looking at SDISPLACEMENT values?

Is it possible to share the .out file and if possible share the model as well. 

Please use the file transfer link in my signature to share the model file
 

please check the files which i have shared.

Is possible give a model which can be correlated with FRF and Transient

Hi,

I am checking with experts and I will get back to you soon. 

hi 

you got any answers for that

Hi,

Not yet, I have shared details already awaiting feedback. 

I will leave a reminder.