1.1 这些实践包括计算车辆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车辆响应:( 1. )轴体（簧载质量）运动，或( 2. )身体（簧上质量）加速度，作为时间或距离的函数。 1.3 这些实践提供了用于计算的标准车辆模拟（四分之一、一半和全车）。 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====== 4.1 这些实践提供了直接从测量轮廓评估行进表面粗糙度特性的方法。计算值表示车辆对行驶表面粗糙度的响应。 4.2 这些实践提供了一种校准响应型路面粗糙度测量设备的方法。 4.

1.1 These practices cover the calculation of vehicular response to longitudinal profiles of traveled surface roughness. 1.2 These practices utilize computer simulations to obtain two vehicle responses: ( 1 ) axle-body (sprung mass) motion, or ( 2 ) body (sprung mass) acceleration, as a function of time or distance. 1.3 These practices present standard vehicle simulations (quarter, half, and full car) 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 ====== 4.1 These practices provide a means for evaluating traveled surface-roughness characteristics directly from a measured profile. The calculated values represent vehicular response to traveled surface roughness. 4.2 These practices provide a means of calibrating response-type road-roughness measuring equipment. 4