振动环境下螺栓连接结构的HHT分析  

HHT Analysis of Bolt Joints in Vibration Environment

作　　者：张永娟[1] 曾国英[1] 赵登峰[1] 权玉[1] 

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621010

出　　处：《机械设计与制造》2013年第11期161-163,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金(10876034);国家科技重大专项课题(2011ZX04002-081);西南科技大学创新基金(13ycjj44)

摘　　要：首先通过搭建螺栓连接结构振动实验系统,利用LABVIEW编程对螺栓连接结构进行随机激励,并且对振动环境下螺栓连接结构的响应信号进行采集保存,再利用Matlab编程进行希尔伯特黄变换(HHT)分析,得到振动环境下不同预紧力的螺栓连接结构响应信号的Hilbert边际谱图,反映了随着预紧力的变化螺栓连接结构的频率变化情况;最后将边际谱图与傅里叶频谱图进行对比,说明由于螺栓连接结构的非线性特征,选用自适应的HHT对振动环境下螺栓连接结构进行分析更加准确。The bolt joints structure vibration experiment system was built,then using LABVIEW programming to excite the bolt joints structure and collect and preserve the vibration response signal.The Hilbert-Huang transform （HHT）is proposed to analyze the response signal of flange bolt joints structure in vibration environment by Matlab.The Hilbert marginal spectrum under different perforce were obtained and showed the frequency changes of bolt joints structure with different perforce.The comparison of Hilbert marginal spectrum and Fourier spectrum showed nonlinear characteristics of bolt joints structure and the using adaptive HHT to analyze bolt joints structure under vibration environment is more suitable.

关 键 词：振动环境 螺栓连接结构 希尔伯特黄变换 Hilbert边际谱 

分 类 号：TH16[机械工程—机械制造及自动化] TK413.32[动力工程及工程热物理—动力机械及工程]