page_title: Circle-throw vibrating machine
section_title: Structural support of vibrating equipment
hierarchical_section_title: Circle-throw vibrating machine / Design heuristics / Structural support of vibrating equipment
caption_attribution_description: English: Vibration magnitude factor
context_page_description: A circle-throw vibrating machine is a screening machine employed in processes involving particle separation. In particle processes screening refers to separation of larger from smaller particles in a given feed, using only the materials' physical properties. Circle throw machines have simple structure with high screening efficiency and volume. However it has limitations on the types of feed that can be processed smoothly. Some characteristics of circle-throw machines, such as frequency, vibration amplitude and angle of incline deck also affect output.
context_section_description: The unit's processing ability is related to the vibration, requiring care to the design of the structural and support elements. An inadequate structural design is unable to stabilize the unit producing excess vibrations, leading to higher deflection or reducing effectiveness.
  Total static force applied and spring stiffness:
  When the dynamic forces of the loading is considered, an amplitude magnification factor (MF) must be considered:
  An estimation of the magnification factor for a system with one degree of freedom may be gained using:
  Most structural mechanical systems are lightly damped. If the damping term is neglected:
  where fd/fₙ represents frequency ratio (frequency due to dynamic force, fd, and natural frequency of the unit, fₙ).
caption: the relationship between amplitude magnification factor of vibrations to the amount the unit has been dampened to resist natural frequencies (lower denominator in ratio thus higher ratio, and lower MF) [12]
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