MOTION DISCOMFORT AND TRANSPORTATION GUIDEWAY FORM

A three-dimensional theory of motion discomfort is developed by defining scalar indices measuring discomfort due to acceleration and jerk. These indices are functions of effective acceleration and jerk vectors and their orientation to the preferred configuration of a subject. The optimal bank angle of a guideway is defined and shown to minimize acceleration discomfort. Isotropic approximation to the discomfort indices are proposed. Expressions for the indices are obtained in terms of the vehicle motion and guideway geometry. Detailed analyses of motion along optimally banked circular helical and three-dimensional spiral curves are presented. Motion with zero fore-aft thrust on a curve in a vertical plane is also detailed. The approach assumes a smooth guideway and so vibrational inputs are not included. The analysis should be followed up by an experimental program before it is taken too seriously in design. /TRRL/

• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Dais, J L
  • Balachandra, M
• Publication Date: 1974-12

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 523-531
• Serial:
  • Transportation Research /UK/
  • Volume: 8
  • Issue Number: 6
  • Publisher: Pergamon Press, Incorporated

Subject/Index Terms

• TRT Terms: Comfort; Curvature; High occupancy vehicle lanes; Highway grades; Human factors; Jerk control; Mechanical acceleration; Motion; Motion sickness; Passenger comfort; Physiological tolerance; Ride quality; Right of way (Traffic); Slopes; Smoothness; Superelevation; Vibration
• ITRD Terms: 5405: Acceleration; 9138: Comfort; 2870: Degree of curvature; 3071: Evenness; 639: Exclusive right of way; 2806: Gradient; 2051: Human tolerance; 5483: Movement; 5558: Vibration
• Subject Areas: Highways; Railroads; Safety and Human Factors; Vehicles and Equipment; I92: Vehicle Comfort;

Filing Info

• Accession Number: 00125098
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Nov 18 1975 12:00AM