ADVANCED CURTAIN AIRBAG MODELING USING THE UNIFORM PRESSURE APPROACH COMBINED WITH A GAS FLOW ANALYSIS. IN: CAE METHODS FOR VEHICLE CRASHWORTHINESS AND OCCUPANT SAFETY, AND SAFETY-CRITICAL SYSTEMS

This paper presents a new methodology for curtain airbag modeling using the uniform pressure method combined with an analysis using the gas flow approach. It is taken into consideration that a curtain airbag is often inflated by gas distributed over the airbag by vent holes in the diffuser tube. To obtain the outflow characteristics of each hole in the diffuser tube, new features of MADYMO R6.1 were used. After acquiring the mass flow rate and temperature through each vent hole using gas flow, this data was applied to a uniform pressure model of a folded airbag, yielding a model with multiple inflators taking into account timing effects in the deployment phase. Results of this method for 2 different curtain airbag simulations are described. The results are compared to experimental data. It is concluded that even if there was an initial weak point in the uniform pressure method related to curtain airbag simulations, this new method partly using gas flow could be an efficient and promising way to avoid the shortcomings of the uniform pressure method but still having the advantages of relatively small CPU costs and easy modeling.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0768014069
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Ha, W
  • Park, S J
  • Spit, H H
• Publication Date: 2004-3

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 135-142
• Serial:
  • Publication of: Society of Automotive Engineers
  • Publisher: Society of Automotive Engineers (SAE)

Subject/Index Terms

• TRT Terms: Air bags; Automotive engineering; Computer models; Crashworthiness; Gas analysis; Occupant protection devices; Occupant vehicle interface; Simulation; Vehicle design; Vehicle safety
• Subject Areas: Design; Highways; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00979822
• Record Type: Publication
• ISBN: 0768014069
• Report/Paper Numbers: SP-1870
• Files: TRIS
• Created Date: Oct 14 2004 12:00AM