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  1. FRANKOK

    Comparing Modal analysis FEA vs Experimental / High modal density problem

    I doubt you have actual diametral modes of concern unless all blades are exactly the same as the FEA analysis assumes. Mistuning - one of many references is: Castanier, M. P., Ceccio S. L., Epureanu, B, I., Pierre, C, (2007) “Next-Generation Modeling, Analysis, and Testing of the Vibration of...
  2. FRANKOK

    Floating ring seal

    Search http://turbolab.tamu.edu/proc/ many sources at TAMU such as http://turbolab.tamu.edu/uploads/files/trc/XLTRC2%20Brochure.pdf
  3. FRANKOK

    Pinion Gear Second Critical at 2X

    Pinion is in a VFD motor driven double helical gear with upmesh speed increaser driving a compressor. As for many similar designs the first lateral critical speed is above operating speed. However there is a large 2X amplitude peak mainly on the coupling end when speed is at 1/2 the calculated...

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