路面粗糙度 meaning in English

road roughness
surface roughness

Standard test method for measurement of vehicular response to traveled surface roughness
测量车行道路面粗糙度的行车响应曲线的标准试验方法
Based on hydrodynamic lubrication theory , a rectangular tire tread model for simulating the viscous hydroplaning of tire is set up , taking into consideration the effects of hydrodynamic action , squeeze action and road roughness with numerical solutions obtained
摘要根据流体动力润滑理论，将轮胎猫性滑水问题模拟为胎面单元与路面之间的动压、挤压膜问题，同时考虑了路面粗糙度的影响，建立了轮胎胎面单元黏性滑水问题的数学模型，并进行数值求解。