硬涂层叶片结构气-固耦合作用非线性振动特性研究

项目名称： 硬涂层叶片结构气-固耦合作用非线性振动特性研究

项目编号： No.11272016

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 曹东兴

作者单位： 北京工业大学

项目金额： 86万元

中文摘要： 航空发动机叶片的非线性振动研究是国际热点研究课题，硬涂层技术对提高叶片的工作温度和耐磨损、抗腐蚀氧化能力以及热减振具有非常重要的作用。本项目综合利用层合梁理论、约束层阻尼理论、非线性动力学理论以及实验方法研究具有硬涂层叶片结构的气-固耦合作用非线性振动特性。将硬涂层叶片简化为高速旋转的层合梁和层合板模型，考虑叶片构型和气动载荷，建立非线性动力学方程，重点研究硬涂层叶片结构的阻尼减振特性，分析涂层厚度对结构固有特性和损耗因子的影响；研究复杂气动力作用下叶片结构的颤振稳定性，分析涂层几何物理参数、叶片构型参数及气动载荷对涂层叶片结构的非线性振动响应的影响，并研究结构振动可能出现的分叉和混沌等非线性现象；开展涂层叶片结构振动特性实验研究，验证理论分析结果。

中文关键词： 硬涂层；叶片；阻尼；颤振；非线性振动

英文摘要： Analysis of nonlinear vibration for aeroengine blade is a very important research filed. The technology and application of thermal barrier coating are always used to improving the working temperature, and increasing oxidation life, and ameliorating the damaging effects of turbine blade. But the effects of coating for the vibration of turbine blade are not very clear yet. In this program, the laminated beam theory and the constrained layer damping theory and nonlinear dynamics methods and experiment methods are applied to study the nonlinear vibration of coating turbine blade under aerodynamics excitation. First, the nonlinear dynamics equations of rotating laminated beam and plate are established to describe the model of coating turbine blade. The main issues are to study the damping characteristics and flutter stability. The effect of coating thickness to the modal loss factors will be analyzed. In addition, the nonlinear vibration responses of the coating turbine blade will be studied and effects of the coating physical parameters, blade geometry and aerodynamics would be investigated. The bifurcation and chaos also will be studied. And the theoretic solutions will be compared with experiment solutions.

英文关键词： Hard Coating；Blade；Damping；Flutter；Nonlinear vibration