【摘要】 为了进一步认识在有摩擦噪声期间磨痕形貌与噪声之间的关系, 采用两种常用的铁路车辆制动闸瓦材料进行摩擦噪声试验。试验中测取了不同循环次数时摩擦振动三维加速度、噪声声压等动态信号, 并提取了相应的磨痕形貌。通过对磨痕形貌的激光共焦扫描显微镜 (OLS)、SEM及光学显微镜观察, 研究了噪声出现区域的形貌变化。研究结果显示磨痕上有摩擦噪声区域的形貌与无摩擦噪声区域的形貌有一定差别。更多还原

【Abstract】 In order to clarify the progress of the surface topography with and without squeal,two kinds of brake blocks generally used in practice were subjected to squeal-forming tests under reciprocating sliding.Observation of the worn surfaces was performed after interrupting the tests under squealing conditions by means of SEM and optical microscope.By comparison to the topography of those scars,the difference among the surface topographies with and without squeal was investigated.While the influences of the number of cycles,rubbing materials,etc,on squeal and the difference among surface topographies of the corresponding scars were discussed.更多还原