The wavepropagation and power flow characteristics of a shell-type pipe with circumferential surface crack are investigated and the method for crack detection is proposed.
研究在外力激励下含有环向表面裂纹损伤的壳式管道的波传播与功率流特性，并给出裂纹识别方法。
2
Based on the mechanics of wave, the expression of water wavepropagation velocity under the action of gravity is deduced and the effect of surface tension on small wave is analyzed.
本文根据波动理论推导出在重力作用下波的传播速度表达式，分析了微小波动中表面张力的作用。
3
Based on Huygens principle of wavepropagation, a numerical simulation method on CFD software unstructured mesh was founded so as to calculate burning surface regression directly.