普遍存在于机械密封、滑动轴承等关键基础零部件中的共形接触表面混合润滑状态下摩擦磨损性能评估和预测在回转设备，特别是在能源、石化、军事等领域高端装备中的重要性受到越来越多的关注。然而由于理论分析难度高以及实验技术限制多，目前能够详细描述共形接触表面混合润滑摩擦副界面性质的确定性理论模型和相应实验研究的报道不多。本文建立了共形接触表面混合润滑确定性流固耦合模型及考虑表面磨损的性能演变模型，并提出了混合润滑性能加速演变实验设计方法。论文对混合润滑摩擦副表面形貌表征与数值重构进行了研究，通过摩擦实验验证了所建立的模型和方法，研究成果对于共形接触表面混合润滑摩擦副的性能演变分析及预测和优化设计有重要的指导意义。结合共形接触表面混合润滑问题分析需求，系统研究了表面形貌表征方法及参数。基于实测表面形貌数据，探究了测量尺度对与混合润滑研究关系紧密的形貌参数的影响。提出了一种基于形态学分析的分离方法，实现了表面形貌中非周期性特征的分离提取，如孔隙、尖峰和划痕的同步分离。提出了一种表面形貌三维数据配准方法，为获取用于共形接触表面混合润滑研究的大范围、高分辨率表面形貌数据提供了新方法。研究了表面形貌重构方法，引入随机过程理论，提出了非高斯表面形貌重构新思路，建立了新方法，给出了能够准确复现表面特征参数所需的自相关函数截断长度阈值，同时该方法较传统方法能更准确地复现表面形貌偏度和峰度值，而计算耗时较传统方法更少。建立了共形接触表面混合润滑确定性流固耦合模型，考虑了流体润滑区和粗糙峰接触区的双向耦合，使用了考虑润滑剂流变效应的摩擦力计算方法，给出了适用的无量纲参数及数值求解初值选取方法和迭代收敛控制算法，在保证求解精度的同时提高了计算效率。通过设计和实施摩擦系数测量实验，验证了所建立共形接触表面混合润滑模型。以混合润滑确定性模型为基础，结合Archard磨损模型，建立了考虑表面磨损的共形接触表面混合润滑摩擦副性能演变模型，提出了主要考虑混合润滑状态表面磨损的摩擦副性能加速演变实验设计方法。基于标准摩擦磨损实验机，设计和实施了性能演变模型和加速实验设计方法的验证实验。

The evaluation and prediction of friction and wear performance of the conformal contact surfaces under mixed lubrication, which are quite often in the key components such as mechanical seals and sliding bearings, has drawn more and more attention in the analysis and design of rotary equipment, especially in the high value equipment used by energy, petrochemical, military, etc. However, due to the difficulty of theoretical processing and the limitation of experimental techniques, there are few published works on the deterministic theoretical model and corresponding experimental research which can comprehensively describe the interfacial properties of the conformal contact surfaces under mixed lubrication. In this thesis, a deterministic fluid–solid coupling model and a performance evolution model considering surface wear are established for mixed lubrication of conformal contact surfaces and an experimental design method for accelerated evolution of mixed lubrication performance is proposed. The characteristic and numerical simulation of surface topography of the mixed lubrication friction pair are studied. The proposed models and methods are verified by tribologcial experiments. The research results have important guiding significance for the performance prediction and optimization design of the mixed lubrication of conformal contact surface.Combined with the analysis requirements of the mixed lubrication of conformal contact surfaces, the surface topography characterization methods and parameters were systematically studied. Based on the measured surface topography data, the influence of measurement scale on the topographic parameters closely related to the study of mixed lubrication was investigated. A separation method based on morphological analysis was proposed to realize the separation and extraction of non-periodic features of surface topography, such as the separation of pores, spikes and scratches. A three-dimensional data registration method for surface topography was proposed, which provided a new method for obtaining large-scale and high-resolution surface topography data for the research of mixed lubrication of conformal contact surfaces.The numerical simulation method of surface topography was studied. By introducing stochastic process theory, a new idea of non-Gaussian surface topography simulation was put forward and a corresponding new method was established. The threshold of the auto-correlation function cutoff length required to accurately reproduce the key feature parameters of surface topography was given. This new method is more accurate than the traditional methods in reproducing the skewness and kurtosis values of the surface topography, and the corresponding calculation time is less than that of the traditional methods. A deterministic fluid-solid coupling model of mixed lubrication conformal contact surfaces was established, in which the bidirectional coupling between the fluid lubrication regime and the asperity contact regime was considered. The frictional force calculation method considering the rheological effect of lubricant was used. The applicable dimensionless parameters, initial values of iterative solution procedures and control algorithm of the iterative solution procedures were given. All these works improve the computational efficiency while ensuring the accuracy of the solution. The proposed model is verified by the designed frictional coefficient measurement experiment.Based on the proposed deterministic model of mixed lubrication, combined with the Archard’s wear model, the performance evolution model considering surface wear was established for mixed lubrication of conformal contact surfaces. An experimental design method for accelerated evolution of mixed lubrication performance was proposed. Based on the standard friction and wear test machine, verification experiments of the performance evolution model and the accelerated test design method were designed and implemented.