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Dynamics and Roll Stability of a Loaded Class 8 Tractor-Livestock Semi-Trailer
Technical Paper
1999-01-3732
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The transporting of live cattle involves the use of Class 8 tractors and livestock semi-trailers for transportation from farms and feedlots to processing plants. This travel may include unimproved roads, local streets, two lane highways, as well as interstate highways. Typically, cattle are compartmentalized in a “double deck” fashion as it provides utility and comports with size and weight limits for commercial Class 8 vehicles.
Concern has been expressed for the effect of cattle movement upon the dynamic performance of the loaded Class 8 tractor-livestock trailer assembly. Loading guidelines exist for cattle that attempt to prevent injury or debilitation during transit, and literature exists on the orientation and some kinematics of loaded cattle.
Considerable literature exists on the effect of liquid slosh in tankers and swinging beef carcasses suspended from hooks in refrigerated van trailers on the dynamic response and roll stability of those vehicles. However, no research is reported on the case of a loaded livestock trailer-although it is analogized (incorrectly) to the above. This research focuses specifically on loaded Class 8 tractors and livestock semi-trailers.
The authors have engaged in an extensive program involving the five following components:
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1.
Extensive full scale testing of loaded livestock trailers in accepted test protocols including:
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a
Tilt table tests (SAE J2180)
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b
U-turn maneuvers (SAE J2181)
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c
200 ft. radius turns (SAE J2181)
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d
Slalom maneuver (ISO 7401)
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e
Highway Evasive maneuver (ISO 3888)
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a
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2.
Driving on public roads at highway speeds
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3.
Simulation of the tractor-trailer using EDVDS to perform the driving maneuvers in the computer environment.
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4.
Comparison to quasi-static analysis using a static roll model (SRM).
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5.
Analysis of videotape of cattle during test maneuvers.
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Authors
Citation
Clark, B., Ruhl, R., Strauss, M., Mahal, T. et al., "Dynamics and Roll Stability of a Loaded Class 8 Tractor-Livestock Semi-Trailer," SAE Technical Paper 1999-01-3732, 1999, https://doi.org/10.4271/1999-01-3732.Also In
References
- Grandin, Temple, Livestock Trucking Guide, Livestock Conservation Institute, 1992
- Grandin, Temple, Livestock Handling and Transport, CAB International NY, NY, 1992
- Tarrant, Kenny, Harrington, The Effect of Stocking Density During 4-Hour Transport to Slaughter on Behavior, Blood Constituents and Carcass Bruising in Friesian Steers, Meat Science 24 1988 209 222
- Tarrant, P.V. Transportation of Cattle by Road, Applied Animal Behavior Science 28 1990 153 170
- Factbook of the Mechanical Properties of the Components for Single-Unit and Articulated Heavy Trucks, Michigan University, Ann Arbor, 1986.
- Winkler, C.B. Karamihas, S.M. Bogard, S.E. Roll- Stability Performance of Heavy-Vehicle Suspensions, SAE Technical Paper 922426 1992
- HVE Physics Manual, EDVDS Software.
- Nevada Automotive Test Center, Final Report for Wilson Trailer Company, Project Number 20-17-669.
- Dixon, John C., Tires, Suspension and Handling SAE 2nd 1996
- ASAE Standards Yearbook 1997, Dimensions of Livestock and Poultry, December 1996.
- Conner, A.B. Normal Growth Rate of Range Cattle. Bulletin 409, March 1930
- Ruhl, Roland A. Ruhl, Roland, L. Prediction of Steady State Roll Threshold for Loaded Flat Bed Trailers - Theory and Calculation, SAE Technical Paper 973261 1997
- Fancher, Paul S. Mathew, Arvind A Vehicle Dynamics Handbook for Single-Unit and Articulated Heavy Trucks, NTIS #PB88-134044 1987
- Day, Terry D. Differences Between EDVDS and Phase 4, SAE Technical Paper 1999-01-0103
- Ahmed, A.K.W. Lui, P.J. Rakheja, S. Detection of Dynamic Roll Instability of Heavy Vehicles for Open- Loop Rollover Control, SAE Technical Paper 973263 1997
- Clark, Brent Grek, Jason S. Schultz, David W. Dynamic Modeling of a Truck Tractor and Livestock Semi-Trailer Combination, University of Illinois Department of General Engineering Senior Design Project, Fall 1998
- Das, Niladri S. Suresh, Bangalore A. Wambold, James C. Estimation of Dynamic Rollover Threshold of Commercial Vehicles Using Low Speed Experimental Data, SAE Technical Paper 932949 1993
- Ford, Thomas L., Charles, Fred S., Heavy Duty Truck Tire Engineering, SAE Technical Paper 880001 1988
- Garrott, Riley W., The Variation of Static Rollover Metrics With Vehicle Loading and Between Similar Vehicles, SAE Technical Paper 920583 1992
- Gillespie, Thomas D., Fundamentals of Vehicle Dynamics SAE 1992
- Gohring, E. Pflug, H.C. von Glasner, E.C. Contribution to the Force Transmission Behavior of Commercial Vehicle Tires, SAE Technical Paper 912692 1991
- MacAdam, Charles S., Fancher, Paul S., Hu, Garrick T., Gillespie, Thomas D., A Computerized Model for Simulating the Braking and Steering Dynamics of Trucks, Tractor-Semitrailers, Doubles, and Triples Combinations (Phase 4 User’s Manual).
- Nevada Automotive Test Center, Videotapes, Project Number 20-17-669.
- Winkler, C.B. A Primer on the Mechanics of Commercial Vehicle Rollover, SAE Safety TOPTEC, Atlanta, Georgia, April 29-30 1993
- Yap, Pedro, Measurement of Radial Truck Tire Dry Cornering Characteristics, SAE Technical Paper 912677 1991