带挤压薄膜阻尼结构叶片的动态响应分析及试验研究

推进技术 ›› 2016, Vol. 37 ›› Issue (4): 733-740.

带挤压薄膜阻尼结构叶片的动态响应分析及试验研究

陈璐璐¹,洪杰²,马艳红²

中航商用航空发动机有限责任公司，上海 201108,北京航空航天大学能源与动力工程学院，北京 100191,北京航空航天大学能源与动力工程学院，北京 100191

发布日期:2021-08-15
作者简介:陈璐璐，女，博士，工程师，研究领域为航空发动机结构强度振动。E-mail: lemonlulu0128@sina.com 通讯作者:洪杰，男，博士，教授，研究领域为航空发动机结构强度振动。

Theoretical and Experimental Investigation on Dynamic Response of Blade with Squeeze-Film Air Damper

AVIC Commercial Aricraft Engine CO.，LTD.，Shanghai 201108，China,School of Energy and Power Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China and School of Energy and Power Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100191，China

Published:2021-08-15

摘要/Abstract

摘要： 为解决应用于航空发动机叶片的新型挤压薄膜阻尼结构的设计问题，针对带挤压薄膜阻尼结构叶片的动态响应及设计方法进行了理论分析和试验研究。引入复刚度法来表示叶片振动过程中气腔内气体域压强。根据挤压间隙流理论，推导了薄膜阻尼理论模型；分别对复刚度的实部和虚部积分获取势能和耗散能，从而推导出气腔内的气体域对气腔上、下表面固体域作用的阻尼系数和刚度系数。最后通过试验结果与仿真结果的对比，验证了带挤压薄膜阻尼结构叶片动态响应的分析方法，并初步获得了相关参数的设计规律，即薄膜厚度应小于0.2mm，薄膜中心应尽量靠近节线位置。

关键词: 挤压薄膜阻尼；复刚度法；动态响应

Abstract: In order to design a squeeze-film air damper attached to a blade，a theoretical and experimental study has been conducted for the analysis on the vibrating response and the design method on blade with squeeze-film air damper. A complex stiffness was introduced to represent the air pressure in the cavity. Combined with the theory of squeeze-film，a theoretical model of the damper has been developed. The stain energy and dissipated energy were integrated from the real part and imaginary part of the complex stiffness to determine the stiffness coefficient and damping coefficient. An experimental study was carried out for a blade and the results were compared with the numerical prediction. The effects of thickness and location of film were obtained from the results. The thickness of film should be less than 0.2mm，and the centre of the film should be closed to the nodal line.

Key words: Squeeze-film air damper；Complex stiffness；Dynamic response

陈璐璐,洪杰,马艳红. 带挤压薄膜阻尼结构叶片的动态响应分析及试验研究[J]. 推进技术, 2016, 37(4): 733-740.

CHEN Lu-lu¹,HONG Jie²,MA Yan-hong². Theoretical and Experimental Investigation on Dynamic Response of Blade with Squeeze-Film Air Damper[J]. Journal of Propulsion Technology, 2016, 37(4): 733-740.

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