Static load calculation of a vibrating mass
Static load calculation of a vibrating mass
(OP)
Hi everyone,
How to calculate equivalent static load due to vibrating mass.
To be specific, it is vibrating roller load.
Drum Load = 14.9 Ton
Frequency = 28 Hz (1680 vpm)
Amplitude = 0 - 2.5mm
Total load on soil considering vibration will be how much?
Thanks.
How to calculate equivalent static load due to vibrating mass.
To be specific, it is vibrating roller load.
Drum Load = 14.9 Ton
Frequency = 28 Hz (1680 vpm)
Amplitude = 0 - 2.5mm
Total load on soil considering vibration will be how much?
Thanks.






RE: Static load calculation of a vibrating mass
RE: Static load calculation of a vibrating mass
RE: Static load calculation of a vibrating mass
Fo=m*e*ω2
Where:
m=mass of your drum
e=eccentricity of the drum (0-2.5mm)
ω=circular frequency of rotation [for 28 Hz that would 175.9 rad/sec]
As far as the equivalent static load, it would be = the drum weight + (Fo*DLF)
Since you [I assume] don't have a spring constant for the soil (and you also cannot guarantee the time period it will be applied), it will be best to just use 2 as your DLF. Conceivably, it could be more than that (thinking of it as a transmissiblity problem)......but I have a hard time picturing the frequencies getting so close as to causing that.
EDIT: I kind of have to re-think my statement above (i.e. about the DLF/transmissiblity not exceeding a factor of 2). Running some rough numbers, I can see the possibility of the frequencies getting close depending on the site characteristics. However, I think damping would bail you out here to some degree. Again running some rough numbers I came out with a (minimal) damping ratio of about 15%. With that, the transmissiblity factor would be about 3.4
RE: Static load calculation of a vibrating mass
RE: Static load calculation of a vibrating mass
I don't know. But that might let you calculate/verify the equivalent mass that is rotating. Since you have contact info for them......you may want to contact them and explain the problem.