Hello Everyone.

I've been tried to use some ways to apply acceleration input by following FLAC Manual Guidelines.

1. use quiet boundary, apply sxy at base model. Actually, i want to apply acc sinus wave, but in here, it should be in velocity wave for sxy, so is it correct ?, when I use this way, the wave amplitude in the base model is not same with the input vel. the amplitude velocity at the base is ~0.1 (it should be ~0.458 If we follows below part)

Amax = 0.22 g = 2.1582 m/s^2

Acc →a(t)=Amax∗sin⁡(2πft)=2.1582∗sin⁡(2∗pi∗0.75∗t)

Vel → v(t) =Amax/2πf cos⁡(2πft)

Acc sinusoidal wave function : 2.158* sin (2*pi*0.75*t)

v(t)=0.458 cos⁡(2∗π∗0.75∗t)

but, when I just use the Acc wave (a(t)) As velocity input, the amplitude and wave look similar with the velocity wave (v(t)).

So, is it correct ?

and, actually I've tried to use 'apply xacc', but the model has movement. So, I'm confusing about how I can use the 'apply xacc' at the base model, because when we apply input acc at the base we cannot use fix x y in the base model.

Do you have any suggestions ?, thank you for seeing my qustions. I really appreciate your answer.