Influence of Structural Parameters on Optimal Normal Load of Microslip Damped Blades

谷伟伟 1; 徐自力 1; 胡哺松 2; 王尚锦 1

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Influence of Structural Parameters on Optimal Normal Load of Microslip Damped Blades

更新时间：2025-12-08

- Influence of Structural Parameters on Optimal Normal Load of Microslip Damped Blades
- Vol. 42, Issue 7, Pages: 828-832(2008)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK263.3;V231.92
- Online First：10 July 2008，
  
  Published：2008
- 稿件说明：
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谷伟伟 1, 徐自力 1, 胡哺松 2, et al. Influence of Structural Parameters on Optimal Normal Load of Microslip Damped Blades[J]. 2008, 42(7): 828-832.
DOI：

谷伟伟 1, 徐自力 1, 胡哺松 2, et al. Influence of Structural Parameters on Optimal Normal Load of Microslip Damped Blades[J]. 2008, 42(7): 828-832. DOI：

摘要

为了研究阻尼结构参数对阻尼叶片最优正压力的影响

基于微滑移模型

推导出了阻尼器非线性干摩擦阻尼力的计算公式.建立了带阻尼结构叶片的有限元非线性动力学方程

采用谐波平衡法对系统动力响应进行了计算.计算结果表明:系统的共振频率随正压力的增大而增大; 叶尖响应随正压力的增大先减小后增大; 存在一个最优正压力

使阻尼器的减振效果最好

该最优正压力随阻尼器接近叶尖而减小

随阻尼器截面抗拉刚度的增大而减小

且对激振力幅值改变不敏感.

Abstract

In order to study the influence of structural parameters on the optimal normal load

a microslip model was used to formulate the nonlinear dry friction force. The nonlinear equations of motion for damping blades were established using the finite element method

and the dynamic response of damped blades were sloved using the harmonic balance method. The results show that the resonance frequency of the blade increases with the increase of normal load. There exists an optimal normal load on which the response is the minimum. The optimal normal load decreases as the damper closes to the blade tip or the cross-section stiffness of the damper increases. In addition

the optimal normal load is insensitive to the amplitude change of excitation force.

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references

PIERRE C, FERRI A A, DOWELL E H. Multi-harmonic analysis of dry friction damped systems using an incremental harmonic balance method [J]. Transactions of the ASME: Journal of Applied Mechanics, 1985,52(4): 958-964.

SINHA A, GRIFFIN J H. Effects of static friction on the forced response of frictionally damped turbine blades [J]. Transactions of the ASME: Journal of Engineering for Gas Turbines and Power, 1984, 106(1): 65-69.

MENQ C H, BIELAK J, GRIFFIN J H. The influence of microslip on vibratory response: a new theoretical model [J]. Journal of Sound and Vibration, 1986, 107(2): 279-293.

MENQ C H, BIELAK J, GRIFFIN J H. The influence of microslip on vibratory response: a comparison with experimental results [J]. Journal of Sound and Vibration, 1986, 107(2): 295-307.

CSABA G. Modeling micorslip friction damping and its influence on turbine blade vibrations [D]. Linköping, Sweden: Linköping University, 1998.

徐自力,谷伟伟,吕强,等.基于微动滑移模型的叶片阻尼结构参数研究[J].西安交通大学学报,2007,41(5):507-511.

XU Zili, GU Weiwei, LU Qiang, et al. Study on damping structure parameters of blades based on the microslip model [J]. Journal of Xi'an Jiaotong University, 2007, 41(5):507-511.

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王尚锦

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Related Institution

MOE Key Laboratory for Strength and Vibration, Xi'an Jiaotong University

School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology

Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Xi'an Jiaotong University

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