HOW TO INTEGRATE ACCELERATION-TIME FUNCTION?

[Mitrs]

I have a ground motion data at 0.02 sec time intervals and based on that I have the acceleration as a function of time. I need to find velocity of ground displacement,how can I integrate acceleration to find velocity and ground motion?

[nimic]

Hello Mitrs

isn't that fairly trivial? In my DIAdem versions from 2.0 to 9.1, in the CALC module there is a base function 'Integrate', which does exactly what you'd expect.

There is a minor caveat in that even the slightest offset in a e.g. vibration channel will cause the integrator to accumulate this offset. If this is not desired, the offset has to be removed. E.g. by smoothing the channel in question with a generous smooth width (this would give offset only) and subtracting this offset from the original vibration channel.

Maybe you could include a chunk of data, some 20 or so values, to play around with.

regards

Michael

[Mitrs]

Thanks for your answer, I have 1900 values of ground motion and I have made an excel sheet to calculate what I want.I wonder if I can integrate in that program,all points are in 0.02 time intervals.

Thanks,

Mitra

[Brad_Turpin]

Hi Mitrs,

Do you have DIAdem installed?  If so, would you please go to the ANALYSIS panel and select the "Integration" function in the "Basic mathematics" palette and give that a try?

Please let us know how that works,

Brad Turpin

Product Support Engineer

Naitonal Instruments