复合材料科学与工程 ›› 2013, Vol. 0 ›› Issue (4): 35-38.

• 基础研究 • 上一篇    下一篇

基于分形维的锚杆有效振动信号特征的提取方法

孟祥程1*, 杨滢涛2, 杨健辉1   

  1. 1.河南理工大学土木工程学院,河南焦作 454000;
    2.中铁十一局三公司,湖北宜昌 443000
  • 收稿日期:2011-11-01 出版日期:2013-07-28 发布日期:2022-03-14
  • 作者简介:孟祥程(1987-),男,硕士,主要从事岩石锚杆动力测试方面的研究,meng_chen101@163.com。
  • 基金资助:
    国家自然科学基金项目(41172317); 深部矿井建设省重点学科开放实验室开放基金(2011KF-01); 河南省教育厅科技攻关项目(2010A560010); 河南理工大学研究生创新基金(2011-M-44)

METHOD OF ABSTRACT EFFECTIVE VIBRATION SIGNAL CHARACTERISTICS BASED ON FRACTAL DIMENSION

MENG Xiang-cheng1*, YANG Ying-tao2, YANG Jian-hui1   

  1. 1. School of Civil Engineering,Henan Polytechnic University, Jiaozuo 454000,China;
    2. The Third Company of China Railway 11 Bureau,Yichang 443000,China
  • Received:2011-11-01 Online:2013-07-28 Published:2022-03-14

摘要: 振动信号特征的有效提取是动态信号分析与处理过程中的关键技术。根据振动过程中的能量特性,对锚杆的振动特性和能量之间的关系,用ANSYS/LS-DYNA 软件对锚杆在脉冲激励下的动态信号进行模拟,分别得到了未张拉和张拉状态下的振动幅度波形,通过MATLAB程序重现波形,然后采用分形维的方法对振动波形进行处理,获得了振动波形的初至以及整周期位置,从而证明了基于分形维的有效振动信号特征提取的可靠性。

关键词: 振动分析, 无损检测, 锚杆, 能量特性, 分形维, ANSYS/LS-DYNA, MATLAB

Abstract: The effective extract to vibration signal characteristics is the key technology in the process of dynamic analysis and processing. For the relationships between vibration characteristics and energy,and on the basis of energy characteristics in the procedure of vibration,the ANSYS/LS-DYNA software is used to simulate the dynamic signal under the impulse excitation for anchor bolt. Then the status of free and tension displacement wave is got respectively. The fractal dimension method is used to handle the wave,and the first arrival and integer cycle position is then obtained in MATLAB software. The result obtained from this study is demonstrated the reliability with the method of fractal to extract the valid signal characteristics.

Key words: vibration analysis, nondestructive testing, anchor bolt, energy characteristics, fractal dimension, ANSYS/LS-DYNA, MATLAB

中图分类号: