详情

原文传递 U24: Heavy Truck Rollover Characterization (Phase C).

题名：	U24: Heavy Truck Rollover Characterization (Phase C).
作者：	LaClair-T.; Knee-H.; Franzese-O.; Arant-M.; Hathaway-R.
关键词：	Trucks-; Rollover-tests.;Stability-; Testing-; Semi-trailer-trucks; Cargo-tanks; Axles-; Tires-; Computerized-simulation; Air-bag-restraint-systems; Suspension-; Vehicle-dynamics; Pavements-.
摘要：	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.
报告类型：	科技报告