dynamic loading

i am designing monopole antannae, the vibration conditions are 1-) 23Hz to 50Hz with pk to pk 1.6g, 2-) 50 to 150Hz at 2g.How do i use this data in staadpro and how do i provide the damping?

Thanks all

  • To apply the periodic loading like Sinusoidal Loading, you can use the Harmonic Function (under Define Time History  Definition) .The peak amplitude. There you could see the option to define the Peak Amplitude. But in general the harmonic motion from machine  pounds a constant frequency on the resting structure .

    But if you want to apply the varrying forcing cycles, you may want to use the Forcing Function option where you need to feed the period vs acc data. Regarding damping , you can input the information by going

    to DEFINE PARAM. There you could see the two options CDAMP and MDAMP.

    For more detail, you may refer to the Staad application example number 16, 22 and 29 . Also refer to chapter no. 5.31.4 in Technical Reference Manual for more detail on damping.



    Answer Verified By: remi tembo