This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Analysis of Lateral Stability for Doubles
Annotation ability available
Sector:
Event:
Fleet Week
Language:
English
Abstract
The lateral stability for doubles was analyzed in terms of frequency response and characteristic roots by using simple models (with the degree of freedom considered by taking into account lateral motion and yawing motion around vertical axis but excluding such factors as steering system, rolling, unsprung mass, and friction of coupling point). The value of frequency response found by actual testing was roughly in agreement with the value determined by calculation.
Effects of various parameters were also analyzed. This analysis afforded a guideline toward the determination of principal particulars for basic design.
The effect of the loading condition of cargo is most unstable when the first trailer is empty of cargo and the second trailer is loaded. Stability is impaired when the trailer's c.g. is excessively shifted to the rear side. Such loss of stability affects the first trailer more than the second trailer. The stability of each trailer increases in proportion as the wheel base gains in length, and with the increasing cornering power of trailer wheels.
For stability, the overhang at the position of the pintle hook should be as short as permissible.
Recommended Content
| Ground Vehicle Standard | Wheels - Recreational and Utility Trailer Fatigue Test Procedure and Performance Requirements |
| Ground Vehicle Standard | Fifth Wheel Kingpin Performance – Commercial Trailers and Semitrailers |
| Ground Vehicle Standard | Fifth Wheel Kingpin, Heavy Duty - Commercial Trailers and Semitrailers |
Authors
Topic
Citation
Hazemoto, T., "Analysis of Lateral Stability for Doubles," SAE Technical Paper 730688, 1973, https://doi.org/10.4271/730688.Also In
References
- Jindra F. “Tractor and Semi-Trailer Handling.” Automobile Engineer 53 10 October 1963 438 446
- Jindra F. “Tractor and Trailer Handling.” Automobile Engineer 55 2 February 1965 60 69
- Toida K. “Stability and Controllability of Heavy-Duty Vehicles.” Jrl. of SAE of Japan 21 7 July 1967 726 730
- Saito Y. Mori S. Nakamura H. “Stability of Trailers (Part 1).” Symposium of SAE of Japan Autumn 1967 97 102
- Saito Y. Mori S. Aoki A. “Stability of Trailers (Part 2).” Symposium of SAE of Japan Spring 1969 137 145
- Saito Y. “Directional Stability and Controllability of Trailers.” Jrl. of SAE of Japan 21 7 July 1967 731 736
- Nakagawa T. “Dynamic Property of Full-Trailer.” SEISAN-KENKYU (Monthly Journal of Institute of Industrial Science, University of Tokyo) 21 8 August 1969 509 511
- Schmid I. “Engineering Approach to Truck and Tractor Train Stability.” SAE Transactions 76 paper 670006
- Ota M. “Data on Survey of Usability of Combination Vehicles on Existing Roads and Bridges.” Public Works Research Institute of Ministry of Construction February 1970
- Araki Y. “Trailer and Tractor Enterprise in Europe and the United States.” Vehicles and Trailers August 1970 47 51
- Haneda K. “Technical Problems on Doubles Trailers.” Motor Material December 1970 11 15
- Milliken W. F. Jr. Dell'amico F. “Standards for Safe Handling Characteristics of Automobiles.” Cornell Aeronautical Laboratory, Inc. July 1968
- Anderson S. B. “An Examination of Handling Qualities Criteria for V/STOL Aircraft.” NASA Technical Note D-331
- Tuan Pham Anh “Limites de Stabilité et de Sécurité de Manoeuvre.” Ingenieurs de l'Automobile May 1970 239 252
- Moritani C. Chikamori S. “Frequency Response of Automotive Vehicles to Steering Input.” Jrl. of SAE of Japan 19 11 November 1965 881 886
- Hazemoto T. “Lateral Stability of Combination Vehicles.” Mitsubishi Juko Giho 8 6 November 1971 63 75