THE DYNAMIC CHARACTERISTICS OF AUTOMOBILE SEATS WITH HUMAN OCCUPANTS

The dynamic characteristics of seated human were measured in a laboratory environment. The seat/occupant system was excited vertically with random vibration. Relevant transfer functions were computed using real time acceleration signals fed to a Fourier Analyzer. The transfer functions describe the scat response, the human response, and the combined response in the frequency range from 2 to 20 Hz. Of possible significance in ride quality studies are the natural modes of vibration which were identified; these include a 3.0 Hz "head-nod" mode, a 3.0 Hz seat vertical mode, a 5.6 Hz human response mode, and a seat "back-slap" mode occurring at 11 Hz. /GMRL/

• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Varterasian, J H
  • Thompson, R R
• Publication Date: 1977-3

Media Info

• Pagination: 10 p.

Subject/Index Terms

• TRT Terms: Automobiles; Dynamic loads; Dynamics; Human beings; Riding qualities; Seats; Transfer functions; Vehicle occupants; Vibration
• Uncontrolled Terms: Dynamic characteristics; Dynamic response
• Subject Areas: Highways; Passenger Transportation; Safety and Human Factors;

Filing Info

• Accession Number: 00164999
• Record Type: Publication
• Report/Paper Numbers: SAE 770249
• Files: TRIS
• Created Date: Nov 23 1977 12:00AM