摘要
航空发动机火焰筒长期工作于严酷的高温、强噪声环境中,火焰筒结构在温度载荷与随机声激励载荷的耦合影响下极易发生疲劳破坏现象。采用耦合有限元/边界元的方法以某型单管火焰筒为原型,建立火焰筒简化模型,对高温随机声载荷下火焰筒结构进行数值仿真计算。通过功率谱密度法对结构非线性动力学响应特性进行分析,总结出火焰筒结构随温度和声压级变化时应力响应特性的规律。该研究方法、模型和结论对深入开展火焰筒薄壁结构动力学设计具有一定的参考价值。
The flame tube of aero-engine works in the harsh environment of high temperature and strong noise for a long time.In this paper,coupled finite element/boundary element method is used a single-tube flame tube as the prototype with taking to establish a simplified model of the flame tube,which is used to numerially simulate and calculate the structure of the flame tube under random acoustic load and high temperature.The power spectral density method is used to analyze its nonlinear dynamic response characteristics.This research method,model and conclusion are of certain reference value for the deep dynamic design of thin-walled structure of the flame tube.
作者
张家铭
沙云东
艾思泽
ZHANG Jiaming;SHA Yundong;AI Size(Liaoning Province Key Laboratory of Advanced Measurement and Test Technology of Aviation Propulsion,Shenyang Aerospace University,Shenyang 110136,China)
出处
《机械制造与自动化》
2020年第6期101-105,共5页
Machine Building & Automation
基金
辽宁省“兴辽英才计划”项目(XLYC1802086)。
关键词
火焰筒结构
热声载荷
耦合的有限元/边界元
响应分析
flame tube structure
thermoacoustic load
coupled finite element/boundary element
response analysis
