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  1. LuisFelipeMS

    Rigid structure for rotating machine reformation. More mass for a stiffer structure?

    Hi all, I am checking the natural frequency of some rotating machines (electric motors) and for that I have a cast iron slab on the top of a concrete block. The total mass is about 25ton. According to IEC 60034-14 standard, I can use this rigid base to test only machines with less than 2.5 ton...

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