摘要
利用本征函数展开法详细讨论了有限长管道中导波的激光激发，给出了当四个相同能量的激光脉冲轴对称打在管外壁上时，管壁上各点振动的瞬态解，通过数值计算，给出了主要模式的瞬态波形，且从色散关系出发对瞬态波形的特征进行了定性解释。
The problem of the laser-generated guided elastic wave modes in hollow cylinders is investigated numerically by using the method of eigen-function expansion. The explicit expression of the transient waveforms is given for the case of the outer surface of the hollow cylinder beat axi-symmetrically by four pulsed lasers with same energy. The characteristics of the transient waveforms are explained based on the dispersive relations.
出处
《声学学报》
EI
CSCD
北大核心
2001年第6期489-496,共8页
Acta Acustica
基金
国家教育部博士点基金项目(No.1999028432)
江苏省自然科学基金项目(BK97031)
关键词
管道
激光激发
瞬态导波
超声波检测
本征函数展开法
Dispersion (waves)
Eigenvalues and eigenfunctions
Laser pulses
Numerical analysis
