摘要
为了研究扭转模态在不同形状管道中的传播特性和缺陷的检测能力,建立了带有缺陷的管道有限元模型,利用有限元软件ABAQUS对T(0, 1)模态导波在直管、弯管中的传播过程进行数值模拟研究。导波信号采用汉宁窗调制的正弦信号,激励T(0, 1)模态信号。结果表明:最低阶的扭转模态适合于管道的缺陷检测;50 kHz的T(0, 1)模态导波对直管、弯管上的缺陷敏感,在缺陷对应的位置上,导波的回波幅值最大,能量也较集中。
In order to study the propagation property and defect detection ability of the torsional modes in different shapes of pipelines with defects,in this paper,a finite element model of pipeline with defects is established.The numerical simulation of T(0,1) modal guided wave propagation in the straight pipeline and the elbow is carried out by finite element software ABAQUS.The sinusoidal signal modulated by Hanning window is used to excite the T(0,1) modal signal.The results show that the lowest order torsional mode is suitable for pipeline defect detection.Moreover,the T(0,1) modal guided wave of 50 kHz is sensitive to the defects of the straight pipeline and the elbow.In the position corresponding to the defect,the guided wave has the greatest echo amplitude and the more concentrated energy.
作者
栗霞飞
刘飞
赵满全
杜兰
刘晓东
LI Xia-fei;LIU Fei;ZHAO Man-quan;DU Lan;LIU Xiao-dong(College of Mechanical and Electrical Engineering,Inner Mongolia Agricultural University,Hohhot 010018,Inner Mongolia,China)
出处
《声学技术》
CSCD
北大核心
2019年第2期164-169,共6页
Technical Acoustics
基金
国家自然科学基金项目(11662013)
