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 ______      ___      _____      ___      _____   
|      \\   / _ \\   /  ___||   / _ \\   /  ___|| 
|  --  //  | / \ || | // __    | / \ || | // __   
|  --  \\  | \_/ || | \\_\ ||  | \_/ || | \\_\ || 
|______//   \___//   \____//    \___//   \____//  
`------`    `---`     `---`     `---`     `---`

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Text this: Vibration due to non-circularity of a rotating ring having discrete radial supports - With application to thin-walled rotor/magnetic bearing systems