航空发动机转子叶片的多层次建模与高阶振动精准模拟

项目名称： 航空发动机转子叶片的多层次建模与高阶振动精准模拟

项目编号： No.11202179

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 于涛

作者单位： 烟台大学

项目金额： 25万元

中文摘要： 转子叶片是航空发动机、大型压缩机等重大旋转机械的关键旋转构件。传统直接以单个叶片为对象的振动分析计算研究方法通常不能保证叶片在复杂耦合环境下的振动特性和振动响应的准确性和精度,尤其是高阶振动特性与响应分析的要求。本项目提出采用多层次建模和超模型的思想，以航空发动机压气机叶片为重点研究对象，突破复杂环境下转子叶片的振动精确分析的建模问题，即分别建立航空发动机转子系统的整机离散集中质量模型、叶片-轮盘结构的混合模型、单叶片的超模型。进而以压气机叶片的超模型为基础，研究有效的振动计算分析方法，确定压气机叶片的固有振动特性及复杂载荷作用下的动态响应，实现压气机叶片的（高阶）振动响应的精准模拟。本项目还将结合压气机叶片典型工况在试验器上的实际测试结果，进行相应的模型验证和方法验证。本项目的研究成果还将为航空发动机转子叶片的结构设计和故障诊断提供重要参考。

中文关键词： 转子系统；多层次建模；航空发动机；叶片；质量慢变

英文摘要： Rotating blades are the important rotating parts in the key rotating machinery like aeroengine and large-scale compressor. The traditional computing methods applied directly on single blade can not assure the analyzing accuracy of the vibration characteristics and response of those blades, especially for the high-order vibration analysis, under complicated environment. In this project, taking compressor blades as researching object, a novel modeling method of multi-level modeling for rotating blades in aeroengine is studied for their precise vibration analysis. The method consist of three parts, firstly, lumped mass model of the whole rotor system of aeroengine; secondly, the hybrid model of the structure of blade-disc; thirdly, the super model of a specific rotating blade. On the base of supermodel of rotating blade, the effective analysis methods are proposed to determine the natural characteristics and dynamic response of compressor blades under complicated loads. Consequently, the precise vibration simulating, especially the high-order vibration, can be realized. The corresponding model testing and method validating will be carried through the experiments of compressor blades under different typical working conditions on a test rig. The achievements of the project can also supply references for the structure

英文关键词： Rotor system；multi-level；aeroengine；blade；single slowly-varying mass