ISOLATION AND ABSORPTION OF MACHINERY VIBRATION

The isolation of machinery vibration from rigid and nonrigid substructures is described in uncomplicated terms. One- and two-stage mounting systems, single and multiple antivibration mountings, and beamlike and platelike substructures are examined. A machine and the intermediate mass of a two-stage mounting system are considered to be supported by flanges or feet to demonstrate the loss in isolation that can occur if the flanges are not rigid but are multiresonant because of their poor design. The use of conventional dynamic absorbers to reduce the vibration of such structural members as beams (rails and stanchions) and circular plates (bulkheads) is discussed. A novel dynamic vibration absorber is described that comprises a damped circular plate loaded centrally by a lumped mass and clamped at its perimeter to the vibrating item or structure of concern. (Author)

• Supplemental Notes:
  • Presented at the Workshop on the Reduction of Noise and Structural Vibration, 26 Apr 76.
• Corporate Authors:

  Pennsylvania State University, University Park

  Applied Research Laboratory
  University Park, PA  United States  16802
• Authors:
  • Snowdon, J C
• Publication Date: 1976-7-1

Media Info

• Pagination: 54 p.

Subject/Index Terms

• TRT Terms: Buckling; Damping (Engineering); Damping (Physics); Dynamic loads; Energy absorption; Engine mounts; Failure; Flanges; Machinery; Machines; Noise; Noise control; Resonance; Shafts (Machinery); Shear stress; Ship structural components; Stiffness; Structural analysis; Structural members; Vibration; Vibration control; Vibration isolation
• Uncontrolled Terms: Dynamic response; Noise reduction; Shear failure
• Old TRIS Terms: Antivibration mounts; Machinery noise; Machinery vibration; Mounts; Rotating shafts; Structural vibration; Vibration absorption; Vibration isolators
• Subject Areas: Design; Environment; Marine Transportation;

Filing Info

• Accession Number: 00151526
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: TM-76-188 Tech. Memo
• Contract Numbers: N00017-73-C-1418
• Files: TRIS
• Created Date: Apr 13 1977 12:00AM