IMPROVING A MATHEMATICAL MODEL OF AN AUTOMOBILE SEAT WITH RESPECT TO SEAT UPHOLSTERY FRICTION

VERBESSERUNG EINES MATHEMATISCHEN AUTOSITZ-MODELLS BEZUEGLICH FEDERKENNLINIEN UND REIBUNG

This report demonstrates the improvement of the mathematical model of an automobile seat from the aspect of spring characteristics and friction. The test results were fed into an American computer program on a dummy in a head-on collision in order to show the difference between the American model and the forwarded model. In all hitherto published reports, the seat friction and spring characteristics of the seat uphostery were observed on an overall constant basis. In the submitted project, static and sliding friction have been differentiated with respect to seat upholstery friction. For this reason, the friction coefficient was incorporated into this calculation as a variable over the sliding distance. Likewise, the spring characteristics of the seat was assumed as a variable over the entire seat upholstery which means for each seat position, that the polynomial coefficients were changed during the collision process to determine the seat upholstery energy. The spring characteristics and the friction coefficient were ascertained by tests. These two supplementary procedrues resulted in the kinematics of the dummy, being more closely assimilated to the actual collision process.

• Corporate Authors:

  Franckhlsche Verlagshandlung

  Pfizerstrasse 5, Postfach 640
  7000 Stuttgart 1,   Germany 
• Authors:
  • ANSELM, D
• Publication Date: 1975-6

Language

• German

Media Info

• Pagination: p. 180-185
• Serial:
  • ATZ - Automobil Technische Zeitschrift
  • Volume: 77
  • Issue Number: 6
  • Publisher: Franckhlsche Verlagshandlung

Subject/Index Terms

• TRT Terms: Coefficient of friction; Computer programs; Dummies; Fabrics; Frontal crashes; Kinetics; Mathematical models; Seats; Sliding friction; Static stability; Vehicle springs
• Old TRIS Terms: Static friction coefficient
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00125351
• Record Type: Publication
• Source Agency: Highway Safety Research Institute
• Files: TRIS
• Created Date: Dec 3 1975 12:00AM