FINITE ELEMENT METHODS REDUCE INTERIOR NOISE

As the structural mass for a given vehicle size is minimized, noise and vibration problems can occur in the passenger environment. The structural analyst has particular interest in the "road noise" caused by vibrations induced by road roughness and influenced by any component in the tire, suspension, frame, body, and acoustic cavity system. The spectrum of road noise has been found to be strongly influenced by the vibration characteristics of the car body, particularly at low frequencies in the range of the first few cavity acoustic resonances. The article shows how finite element methods can be applied to evaluate the effect of the lower frequency structural modes and the lower frequency cavity acoustic modes on noise in the passenger compartment. The greatest potential of the acoustic finite element method may be achieved after its consolidation with existing structural analysis methods. Estimates of structurally generated noise will then be possible before prototype development.

Media Info

  • Pagination: p. 32-37
  • Serial:
    • Automotive Engineering
    • Volume: 86
    • Issue Number: 5
    • Publisher: Society of Automotive Engineers
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00183251
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Dec 12 1978 12:00AM