Dynamic stiffness of elastic elements

Test bench for determining dynamic stiffness

To reduce the impact sound and vibration transfer from machines, they are often placed on elastic bearing elements. The effectiveness of the decoupling depends on the dynamic properties of these elements. To determine the dynamic parameters in the relevant frequency range, Müller-BBM has designed and built a test bench for determining the dynamic stiffness of resilient elements in Planegg.

The equipment was designed for testing spring elements, such as those found in railway tracks, special shipbuilding, and automotive engineering application. Other applications include elements for building suspension and testing in research and development projects.

Dynamic stiffness is usually tested as a transfer stiffness. The test specimen can be subjected to compression as well as thrust with variable dynamic forces.

Characteristics of the test bench

  • Test specimen dimensions, up to (W x D x H) 600 mm x 600 mm x 900 mm
  • maximum vertical static preload 180 kN
  • maximum amplitude of dynamic force 2 kN

The test bench allows for tests according to the following standards:

  • ISO 10846-1
    Acoustics and vibration – Laboratory measurement of vibro-acoustic transfer properties of resilient elements
    Part 1: Principles and guidelines
  • ISO 10846-2
    Acoustics and vibration – Laboratory measurement of vibro-acoustic transfer properties of resilient elements
    Part 2: Dynamic stiffness of elastic supports for translatory motion – Direct method
  • ISO 10846-3
    Acoustics and vibration – Laboratory measurement of vibro-acoustic transfer properties of resilient elements
    Part 3: Indirect method for determination of the dynamic stiffness of resilient supports for translatory motion
  • ENV 13481-6
    Railway applications - Track - Performance requirements for fastening system
    Part 6: Special fastening systems for attenuation of vibration
  • DB TL 918 071
    Technical delivery specifications: Sub-ballast mats
  • BN 918 235
    Technical delivery specifications: Elastic intermediate layers and pads
  • BN 918 145-1
    Technical delivery specifications: Prestressed concrete sleepers with elastic pads - Flexible sleeper soles

Additional pages