In this study, to investigate the effect of the hexagon friction block installation direction on the surface tribology and friction-induced vibration and noise (FIVN), tribological tests were carried out on a self-manufactured high-speed train brake dynamometer under different installation directions. Accordingly, a finite element (FE) model with material parameters and boundary conditions coinciding with the test rig was used to conduct complex eigenvalue analysis (CEA), and the Archard wear formula was employed to simultaneously study the wear and vibration. The results demonstrate that the installation direction has little effect on the frequency and mode shape of unstable modes, but the FIVN intensity, the phase-space characteristics of the friction noise, and the damping ratio of the brake system are changed. The contact stress and wear are found to be mainly distributed in the leading edge and the inner area of the friction block, leading to the severe eccentric wear phenomenon, and the friction heat is mainly concentrated in this area and the inner region of the disc friction area. The degree of uneven wear of the block is found to vary with the change of its installation direction, which also causes differences in the amount of wear debris flowing in the brake interface and the damage to the interface. Under the joint action of wear debris, friction heat, and contact stress, the brake interfaces of the brake systems with different block installation directions are found to exhibit different tribological behaviors, which affects the intensity of FIVN and the phase-space characteristics of friction noise. Therefore, it is necessary to consider the influence of the block installation direction on the tribological and dynamic behaviors of the brake interface of high-speed trains when designing the brake pad, which can aid in the development of a brake pad with excellent interface tribological behavior and friendly FIVN characteristics.

本研究为研究六边形摩擦块安装方向对表面摩擦学和摩擦引起的振动和噪声（FIVN）的影响，对自行制造的高速列车制动测功机进行了不同安装方向下的摩擦学试验。 . 相应地，利用与试验台一致的材料参数和边界条件的有限元（FE）模型进行复特征值分析（CEA），并采用Archard磨损公式同时研究磨损和振动。结果表明，安装方向对不稳定模态的频率和模态形状影响不大，但会改变FIVN强度、摩擦噪声的相空间特性和制动系统的阻尼比。发现接触应力和磨损主要分布在摩擦块的前缘和内部区域，导致偏心磨损现象严重，摩擦热主要集中在该区域和盘摩擦内部区域区域。发现挡块的不均匀磨损程度随着其安装方向的变化而变化，这也造成了制动界面中磨损碎屑的流动量和界面损坏的差异。在磨屑、摩擦热和接触应力的共同作用下，不同块安装方向的制动系统的制动界面表现出不同的摩擦学行为，影响了FIVN的强度和摩擦噪声的相空间特性. 所以，