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  2. Dunkerley's method - Wikipedia

    en.wikipedia.org/wiki/Dunkerley's_Method

    The whirling frequency of a symmetric cross section of a given length between two points is given by: = where: E = Young's modulus, I = second moment of area, m = mass of the shaft, L = length of the shaft between points.

  3. System Mechanic Software | 30-Day Free* Trial | AOL Products

    www.aol.com/products/utilities/system-mechanic

    Download System Mechanic to help repair and speed up your slow PC. Try it free* for 30 days now. ... cancel before the 30-day trial ends. ... Runs a full battery of over 200 critical tests in just ...

  4. Critical speed - Wikipedia

    en.wikipedia.org/wiki/Critical_speed

    Many practical applications suggest as good practice that the maximum operating speed should not exceed 75% of the critical speed [citation needed]; however, some systems operate above the first critical speed, or supercritically. In such cases, it is important to accelerate the shaft through the first natural frequency quickly so that large ...

  5. System Mechanic - AOL Help

    help.aol.com/products/system-mechanic

    Restore power, speed and stability with over 200 critical tests and 50 tools using the go-to solution for ultimate PC performance and trouble-free computing.

  6. Campbell diagram - Wikipedia

    en.wikipedia.org/wiki/Campbell_diagram

    Analysis shows that there are well-damped critical speed at lower speed range. Another critical speed at mode 4 is observed at 7810 rpm (130 Hz) in dangerous vicinity of nominal shaft speed, but it has 30% damping - enough to safely ignore it. Analytically computed values of eigenfrequencies as a function of the shaft's rotation speed. This ...

  7. Download and install System Mechanic - AOL Help

    help.aol.com/articles/how-do-i-download-and...

    Visit the System Mechanic detail page.; Click Try It Free.; If prompted sign in. Enter you billing details. Click Start my free trial.; Click Get started.; Follow the on-screen instructions to begin using your product.

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