U24 : heavy truck rollover characterization (phase C).

LaClair, Tim; Knee, Helmut; Franzese, Oscar; Arant, Michael; Hathaway, Richard; Keil, Mitch; Pape, Doug; Rhoda, Dale; National Transportation Research Center, Incorporated, University Transportation Center

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U24 : heavy truck rollover characterization (phase C).

2010-08-01
By LaClair, Tim ; Knee, Helmut ; Franzese, Oscar ; ...

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Alternative Title:

Heavy truck rollover characterization (phase C).
Creators:

LaClair, Tim ; Knee, Helmut ; Franzese, Oscar ; Arant, Michael ; Hathaway, Richard ; ... More +

LaClair, Tim ; Knee, Helmut ; Franzese, Oscar ; Arant, Michael ; Hathaway, Richard ; Keil, Mitch ; Pape, Doug ; Rhoda, Dale Less -
Corporate Creators:

National Transportation Research Center, Incorporated, University Transportation Center
Corporate Contributors:

United States. Department of Transportation. Research and Innovative Technology Administration
Subject/TRT Terms:

[+]

Dynamics Rollover Crashes Rollover Vehicle Accidents--Testing Stability (Mechanics) Testing Trucks--Dynamics--Testing
Resource Type:

Tech Report
Geographical Coverage:

Tennessee
Edition:

Final report; Nov. 2009-Aug. 2010.
Corporate Publisher:

National Transportation Research Center, Incorporated, University Transportation Center
Abstract:

The effect of changes in the suspension of a cargo tank semitrailer on its roll stability was studied in experiments and modeling. Three configurations were considered: a typical design; a design with a wider track; and a design with wider track and greater separation between the air bags. All configurations used new generation wide base single tires (NGWBST). The experiments consisted of a steady state “ramp” steer, a transient “step” steer, and a more challenging dynamic “double lane change” maneuver. Lumped parameter and flexible body models of the combination vehicle were developed and exercised. Widening the track of the semitrailer’s axles raised the threshold for lifting a tire from the pavement, as predicted. Moving the suspension’s air bags farther apart changed several characteristics of the behavior, with no consistently measurable changes in wheel liftoff threshold. Limited testing with electronic stability control (ESC) showed that the suspension changes did not affect ESC performance. The damping of the trailer roll oscillation provided by the suspension itself was greater than the damping provided by the shock absorbers. This auxiliary damping was generated, at least in part, by the restricted movement of air between the suspension air bags.

This work is the final in a series of studies funded by NTRCI to characterize the roll behavior of heavy vehicles and develop computer simulation models to explain that behavior. Previous studies have explored the behavior of a van semitrailer, a flatbed semitrailer, and a tank semitrailer.
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PDF
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:26f71c4c289ac072ad42fa2ad346b5c5b9ae42824c090062148ef99fd8038069
Download URL:

https://rosap.ntl.bts.gov/view/dot/18356/dot_18356_DS1.pdf
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U24 : heavy truck rollover characterization (phase C).

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