激光冲击处理发动机叶片的固有频率测试  

Natural Frequency Test of Turbine Blades in Laser Shock Processing

作　　者：邹世坤[1] 曹子文[1] 杨贺来[2] 

机构地区：[1]北京航空制造工程研究所,北京100024 [2]北京航空航天大学,北京100083

出　　处：《中国机械工程》2010年第6期648-651,共4页China Mechanical Engineering

基　　金：航空科学基金资助项目(2006ID25)

摘　　要：对叶片激光冲击处理工艺的质量保证技术进行了研究,选择叶片固有频率变化值作为冲击处理质量的表征参数,提出了一种高效、实时、无损的发动机叶片激光冲击强化质量检测新方法。建立了频率测试的试验装置,可以检测工件在激光冲击强化处理时的固有频率改变,实验结果表明:一阶、二阶固有频率随着激光冲击次数的增多而增大,以此作为检测指标对激光冲击强化处理的质量进行判断。Several methods of quality assurance of laser shock processing were researched herein, and an effective, real time and non--destroyed method was presented to inspect the quality of laser shock processing turbine blades by means of analysis of natural frequency shifts. A measurement system for natural frequency was developed, which could measure the natural frequency shifts with each time of laser shock processing, the first--order and second--order natural frequency increase with the times of laser shock processing, the relationship could be used as the quality assurance criterion of laser shock processing.

关 键 词：激光冲击处理 激光喷丸 发动机叶片 质量控制 固有频率 

分 类 号：TN249[电子电信—物理电子学]