SUMMARY The accelerated service life testing of automotive vehicles for durability to road roughness induced dynamic loads is often accomplished in the laboratory using road roughness simulation facilities [1–5]. However, such tests can also be accomplished by a carefully designed field operation on a test course [6], where both the speed of the vehicle and the roughness of die test course become variables that control the degree of the test acceleration. Field tests are generally harder to control than laboratory tests, but offer a greater degree of realism since the vehicle is fully operational during the test exactly as it will be in service. This paper formulates the criteria for accelerated service life tests on a test course, evaluates the assumptions that must be enforced to obtain valid results, and explores the sensitivity of the results to the critical test parameters, namely, the vehicle speed and the road roughness severity of the test course relative to the service environment.

S. Colin ASHMORE

Allan G. PIERSOL

Joseph J. WITTE

Vehicle System Dynamics

VEHICLE SYSTEM DYNAMICS 是一本国际期刊，为车辆工程师和应用科学家提供信息来源。该刊强调各类公路、铁路等地面车辆研发问题的理论背景。主要主题是： 车辆系统及其组件的动力学，包括悬架、转向、制动、底盘系统、噪声-振动-粗糙度、动力传动系；控制影响车辆行为的运动和力；计算机辅助建模与仿真、验证、参数识别与测试、驱动器建模；车辆与环境的相互作用，包括轮轨和轮胎接地行为；主动安全系统，包括碰撞和脱轨警告、避免和缓解；智能车辆、导引车、与车辆动力学相关的自动交通系统、非常规车辆。

Vehicle System Dynamics is an international journal that serves as an important information source for vehicle engineers and applied scientists. The journal emphasizes the theoretical background of various research and development issues related to ground vehicles, including road and rail systems. The main topics of interest include: the dynamics of vehicle systems and their components, such as suspension, steering, braking, chassis systems, noise-vibration-roughness, and powertrains; the control of motion and forces that affect vehicle behavior; computer-aided modeling and simulation, validation, parameter identification and testing, and actuator modeling; the interaction between vehicles and their environment, including wheel-rail and tire-ground interactions; active safety systems, including collision and derailment warnings, avoidance, and mitigation; intelligent vehicles, guided vehicles, and automated traffic systems related to vehicle dynamics, as well as unconventional vehicles.

《Vehicle System Dynamics》是一本国际期刊，旨在为车辆工程师和应用科学家提供重要的信息来源。该期刊重点关注各类公路、铁路等地面车辆的研发问题，强调其理论背景。主要研究主题包括：车辆系统及其组件的动力学，如悬架、转向、制动、底盘系统、噪声-振动-粗糙度、动力传动系统；控制对车辆行为的运动和力的影响；计算机辅助建模与仿真、验证、参数识别与测试、驱动器建模；车辆与环境的相互作用，包括轮轨和轮胎接地行为；主动安全系统，包括碰撞和脱轨警告、避免和缓解措施；智能车辆、导引车以及与车辆动力学相关的自动交通系统和非常规车辆。

Category	Quartile
工程技术	2
工程技术, 工程机械	2

Accelerated Service Life Testing of Automotive Vehicles on a Test Course

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Category	Quartile
ENGINEERING, MECHANICAL	1