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  • Vibration Isolation of Precision Objects
    (or isolator stiffness values) can be. sion vibration-sensitive objects and for more numerous. adjusted by judicious use of damping; and by using ‘smart’. vibration-producing objects. The “safety factors” are realized. constant natural frequency (CNF) vibration isolators. by using very soft
  • A Better Way to Damp Machine Vibrations
    Constant-natural frequency isolators outperform conventional mounts and cost less than active damping systems. In the last issue of MACHINE DESIGN, we examined methods to predict how vibration-isolation systems would perform. ( "Shaking up vibration models, " Nov. 6, 2008, p. 63 to 68
  • Shaking up vibration models
    vibration frequency (expressed as o/ o ) and isolator damping (expressed as a fraction z of the critical damping z of the system). Thus, the object vibrates less than the supporting surface if vibration frequency o >= 1.41 o . Lower-stiffness vibration isolators decrease the natural frequency o
  • Shaking up vibration models
    on supporting-surface vibration frequency (expressed as o/ o ) and isolator damping (expressed as a fraction z of the critical damping z of the system). Thus, the object vibrates less than the supporting surface if vibration frequency o >= 1.41 o . Lower-stiffness vibration isolators decrease the natural
  • Shock, awe, and vibration
    solutions) and solid elastic materials. That's because these so-called viscoelastic materials have a hybrid of qualities. Purely elastic materials store energy during loading then fully return when the load is removed. In contrast viscoelastic materials have a high damping coefficient that returns
  • Measuring For Success
    The following application note shows the steps taken to perform a structural analysis on an automotive exhaust pipe (muffler) structure with the aim of improving the structural damping properties of the exhaust pipe mount. Measuring For Success : Noise & Vibration Measurement Blog. Tweet. Prosig
  • LMS Engineers Quickly Reduce Automobile NVH to Best-in-Class Levels
    an engine bracket by welding a beam to it, etc. Validation of countermeasures The simple countermeasures were then evaluated using FRF testing. The local damping layer had a minimal effect on FRFs but increasing the isolation with a combination of a layer of foam and a heavy damping layer had a major
  • Rigid Yet Flexible Coupling
    are such that hand assembly of the shaft bearing was also a typical requirement. The first attempt was to use a rubber bushing to mount the precision ground bearing to the steering shaft and provide the necessary damping. Since rubber alone would not provide the support needed, a steel-reinforcing sleeve

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