A method for the resonant response evaluation of blades system with underplatform dampers

摘要：

　　The friction damper has been widely used to reduce the resonant vibration of blades.The harmonic balance method is a well-known method for the linearization of the nonlinear friction force.Meanwhile Mindlin gives analytical expression to describe the nonlinear friction force during stick contact condition, therefore the nonlinear force is represented by two linear coefficients, i.e., equivalent stiffness and equivalent damping.In this work, the stiffness matrix and mass matrix are normalized to a lumped mass and corresponding stiffness according to the definition of stiffness and modal mode.For blades system with underplatform dampers, the dynamic equation for multi lumped mass system is derived and also the iteration method is listed.At last, the experiment verification is conducted using 2 plate blades with underplatform damper.The comparison shows a good agreement in both resonant response and resonant frequency for low normal load cases, and still capture the tendency for high normal load cases.

关键词： underplatform damper harmonic balance method resonant response normalization multi-lumped-mass system

作者: Chen Yudi Wang Yanrong

作者单位: School of Energy and Power Engineering, Beihang University, Beijing, China

会议类型: 国际会议

会议名称: the International Conference Vibroengineering-2014

会议地点: 贵阳

会议语种:英文

页码: 164-169

在线出版日期: 2014-11-07（万方平台首次上网日期，不代表论文的发表时间）