基于工作应力仿真分析的某型航空发动机燃-滑油热交换器安装改进思路  

Improvement Method for a Certain Aero-engine's Fuel-lubricating Oil Heat Exchanger and Installation Based on Simulation Analysis of Working Stress

作　　者：杨坤玉[1] 蔡海鹏[1] 罗成[2] 潘存云[2] 

机构地区：[1]长沙航空职业技术学院,湖南长沙410124 [2]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《长沙航空职业技术学院学报》2011年第4期30-34,共5页Journal of Changsha Aeronautical Vocational and Technical College

摘　　要：为找到航空发动机燃-滑油热交换器焊缝裂纹产生的主要原因,对燃-滑油热交换器进行了稳态工作应力仿真分析,提出一种新的安装思路,并对在新的安装方式燃-滑油热交换器进行了整体和失效部位的工作应力仿真分析。结果表明,新安装方式可以有效改善发动机工作时热交换器的工作应力分布和降低峰值,为降低热交换器工作应力和预防焊缝裂纹找到了有效的途径和方法。To find the main cause of fuel -lubricating oil heat exchanger＇s weld cracks on a certain aero - engine, the paper gives a steady simulation analysis of fuel - lubricating oil heat exchanger. Then, a new installation method is presented and the working stress of the entire and disabled parts of the newly fuel -lubricating oil heat exchanger are analyzed. The results show that this new installation method can effectively improve the working stress distribution of the heat exchanger and reduce the peak. Thus, the effective ways are found for reducing the working stress of the heat exchanger and pre- venting the weld cracks.

关 键 词：航空发动机 燃-滑油热交换器 安装方式 动力学仿真 工作应力 

分 类 号：V231.16[航空宇航科学与技术—航空宇航推进理论与工程]