Intentional mistuning based on damping hard coatings can realize a combination of intentional mistuning and a substantial increase in the damping of the system, but causes damping mistuning. Aiming at figuring out the specific effects of damping mistuning, this paper conducts investigations of vibrational characteristics of mistuned blisks, some of them with tuned coating designs and the others with intentional mistuning coating designs. The beginning of the paper demonstrates how to obtain all the necessary sector-level matrices. Then, a transformation matrix is presented to assemble those sector-level matrices into system-level ones. In order to calculate the dynamics of randomly mistuned blisks more efficiently, reduced order models (ROMs) based on the subset of nominal modes (SNM) are established. Finally, the impact of damping mistuning and intentional mistuning, both induced by coating, on free vibration and forced response of mistuned blisks are numerically studied. The obtained results present the effects of different coating patterns on forced response reduction, and reveal the reasons for the different performance of different coating patterns in vibration reduction.

基于对硬质涂层进行阻尼的有意雾化可以实现有意的雾化与系统阻尼的大幅增加的组合，但会导致阻尼雾化。为了弄清阻尼雾化的具体效果，本文对雾化的叶盘的振动特性进行了研究，其中一些进行了调优涂层设计，而另一些则进行了有意的雾化涂层设计。本文的开头演示了如何获取所有必要的部门级矩阵。然后，提出了一个转换矩阵，将那些扇区级矩阵组装成系统级矩阵。为了更有效地计算随机搅动的炸药的动力学，建立了基于标称模式（SNM）子集的降阶模型（ROM）。最后，数值研究了涂层引起的阻尼雾化和故意雾化对雾化叶盘的自由振动和强迫响应的影响。获得的结果显示了不同涂层图案对强制响应降低的影响，并揭示了不同涂层图案在减振方面性能不同的原因。