非线性硬涂层整体叶盘振动参数的多目标优化设计

为了优化应变依赖性硬涂层对整体叶盘的阻尼减振,对具有应变依赖性特征的硬涂层整体叶盘(非线性涂层整体叶盘)的涂层参数进行多目标优化设计.利用基于复合Mindlin板理论的能量有限元法和基于Newton-Raphson法的迭代计算技术分析了非线性涂层整体叶盘的振动特性;利用NSGA-Ⅲ算法求解了非线性涂层整体叶盘的涂层参数...

Multi-objective optimization design for vibration parameters of nonlinear hard-coating blisk

To optimize the damping vibration reduction of strain-dependent hard coating on the blisk，the multi-objective optimization design for coating parameters of the nonlinear hard-coating blisk was conducted.The vibration characteristics of hard-coating blisk was analyzed using the energy-based finite element method with reference to the composite Mindlin plate theory associated with the unified iterative calculation technique based on the Newton-Raphson method；the multi-objective optimization problems for coating parameters of hard-coating blisk were solved by the NSGA-Ⅲ algorithm，and the optimization results were expressed as Pareto front solutions；an academic blisk with NiCoCrAlY+YSZ hard coating on blades，taken as the specific case study benchmark，was selected to conduct the bi-objective and triple-objective optimization design for coating parameters.The results revealed that the effect of the coating parameters on the vibration characteristics of blisk was constrained mutually，the coating parameters located at the “turning point” in Pareto front solutions can balance all aspects of design performance on the vibration characteristics of hard-coating blisk，and the obtained coating parameters can also be referenced according to the practical engineering requirements.