Dynamic load 4

[tiendung1304]

Hi guys, I'm designing a crushing station which has a dynamic load from an ore crusher. All information I got is the mass of the crusher of 450kN. I made a model on STAAD Pro, but have no idea how to determine and apply the dynamic load on it. Any hints or suggestions for resources or books that refer to this problem? Thanks

 

[chichuck]

biendung1304,


You definitely need more information about the crusher. I doubt you will find the needed information in any text or handbook.

You will need things like the dynamic loads applied, including direction, frequency, ampltude and point of application. Also the cg location. Drawings showing arrangement of the crusher including anchor bolts is also needed. You should ask the equipment vendor for this data.


Regards,


chichuck

 

[amendale]

If that is strictly the mass of the crusher, then you need to convert this into an impulse load, for which you would require the maximum acceleration/deceleration parameters of the mechanism. You would then multiple the accelerations by the mass to obtain your load. The manufacturer of the crusher should be able to provide this information, or even give you the dynamic loads directly. Typically the dynamic load for moving equipment is 100% of the mass. So your dynamic load, combined with gravity load should be about 900kN.

 

[amendale]

As chichuck said, you also need to know the frequency of the loading in order to check for resonance/amplification of the dynamic loading to your structure. But for a crusher I think the frequency is very low, so this should not be a concern.

 

[MiketheEngineer]

Call the mfg??

 

[WARose]

Like Mike said: it starts with the manufacturer. If he can't give you the unbalanced force, then the next step is to see if you can figure it out from the equipment drawings.

At this point: most equipment manufacture’s can give you this (unless we are talking fan manufacturers, and that's not hard to figure). Most do an FEA analysis, ergo they needed that force themselves.

 

[tiendung1304]

Thanks guys, I emailed to the supplier to ask for extra information. Hope they will help.

Cheers,