1.1 这些实践包括计算卡车对行驶表面粗糙度纵向轮廓的响应。 1.2 这些实践利用计算机模拟获得两种卡车响应，包括:簧上和簧下质量垂直位移、速度和加速度；以及簧载质量俯仰角位移、速度和加速度。 1.3 这些实践提供了用于计算的标准卡车模拟（四分之一卡车、半单单元卡车和半牵引半挂车）。 1.4 以国际单位制表示的数值应视为标准。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 这些实践为评估卡车行驶质量和卡车轮胎施加的路面载荷提供了一种方法。

1.1 These practices cover the calculation of truck response to longitudinal profiles of traveled surface roughness. 1.2 These practices utilize computer simulations to obtain two truck responses including: sprung and unsprung mass vertical displacement, velocity, and acceleration; and sprung mass pitch angular displacement, velocity, and acceleration. 1.3 These practices present standard truck simulations (quarter truck, half-single unit truck, and half-tractor semitrailer) for use in the calculations. 1.4 The values stated in SI units are to be regarded as the standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 These practices provide a means for evaluating truck ride quality and pavement loading exerted by truck tires.