多谐波法研究带有叶间干摩擦阻尼失谐叶盘系统的共振特性

提出一种高效的多谐波分析方法,以用于研究失谐对带有叶间干摩擦阻尼的叶盘系统共振特性的影响规律.该方法可准确预测叶盘系统在频域的受迫响应,其有效性用数值积分法进行了验证.利用该方法对带有叶间干摩擦阻尼的叶盘受迫振动响应进行了仿真计算,分析了叶盘系统在谐调和失谐两种情况下受耦合强度、黏性阻尼和干摩擦阻尼等系统参数影响下的共振特性.结果表明,提出的多谐波分析法能够高效地研究失谐对带有叶间干摩擦阻尼的叶盘系统共振响应的影响特征,尤其适合考虑各种系统参数的综合影响.

A Multi-harmonic Method for Studying Effects of Mistuning on Resonant Features of Bladed Disks with Dry Friction Damping

An efficient multi-harmonic method is proposed for studying the effects of mistuning on resonant features of bladed disks with blade-to-blade dry friction damping. This method is able to predict accurately the forced response of bladed disks in frequency domain, which is validated by numerical integration method in time domain. The resonant features of both tuned and mistuned systems are investigated by using this method under various system coupling strengths, viscous dampings, and dry friction darnpings, etc. The results demonstrate that the proposed multi-harmonic method is very efficient for studying the mistuning effects on the resonant response of bladed disks with blade-to-blade dry friction damping, especially considering the combined effects of various system parameters.