摘要
本文采用严格的弹性理论,研究了水声声管的内部声场的传播模式以及弹性和壁厚对内部声场的影响。研究结果表明,弹性管壁和刚性管壁在低频传播模式上存在着比较大的差异。最主要体现在存在弹性类波和准平面波模式。利用准平面波模式进行测量时,壁厚在一定范围内对测量结果影响并不很大。
The propagation modes of internal acoustic field and the elasticity and wall thickness influence to them in a water-filled elastic tube waveguide were researched by applying the strict elastic theory. The results show that the low-frequency propagation in elastic tube wall is quite different from the one in rigid tube wall, the most embodiment of which is the existence of the similar elastic wave and the similar plane wave propagation modes. When the similar plane wave propagation mode is used to measure, the variation of wall thickness in certain range have small influence to measurement results.
出处
《船舶力学》
EI
2003年第5期97-103,共7页
Journal of Ship Mechanics
关键词
水声声管
壁厚
弹性
内部声场
频散方程
准平面波
水声材料
传播模式
弹性类波
Elastic waves
Elasticity
Frequencies
Thickness measurement
Tubes (components)
Walls (structural partitions)
Waveguides
