带涂层涡轮叶片载荷简化分析方法 及载荷特性研究

To address the challenges of complex modeling and low efficiency in load analysis of coated turbine blades with cross-scale multilayer coating-substrate systems, an efficient load analysis method based on a shell conduction model and a simplified mechanical model was proposed. The equivalent thermal resistance was introduced into the temperature analysis, and the consistency relation of the interfacial total strain tensors was established in the mechanical modeling, to effectively avoid mesh proliferation, distortion, and computational divergence induced by cross-scale interfaces. The results indicate that, compared with the conventional explicit modeling method, the proposed approach improves the minimum Jacobian ratio by approximately 51.9%, reduces the number of elements by about 80.8%, and enhances computational efficiency by more than an order of magnitude, while keeping temperature and mechanical load prediction errors below 5%. Furthermore, the analysis of coated turbine blades shows that, temperature hotspots are concentrated at the blade tip, while mechanical load hotspots are mainly distributed at the leading edge of the blade root. The load distribution in the coating exhibits a trend highly consistent with that of the substrate, reflecting a strongly coupled response behavior.