圆管中SH周向导波的频散特性

详细信息

Dispersion of Circumferential SH Wave in a Hollow Cylinder

摘要: 研究了圆管中的SH周向导波的传播特性。采用柱坐标系，从纳维运动方程开始推导，得到了SH导波沿周向传播、轴向振动的频散方程。以内外半径之比分别为0.3，0.5和0.7为例，通过数值计算得到了硬铝材料圆筒的频散曲线。结果表明其高阶模式比低阶模式频散显著，故在实际检测中宜选用低阶的SH导波。
- 超声波检测 /
- SH周向导波 /
- 频散 /
- 圆管
Abstract: Through theoretical study on the behavior of guided SH wave propagating along the circumferential direction of a hollow cylinder, based on the cylindrical coordinate system, the dispersion equation of guided SH wave was obtained by the derivation of Naviers equation. The numerical dispersion curves were calculated on Al hollow cylinder with ratios of internal to external radius as 0.3, 0.5 and 0.7. The results indicated the higher-order SH modes were more obvious than the lower-order SH modes in dispersion. So there are some advantages in applying the SH mode of the lower-order compared to the higher-order.
- Ultrasonic testing /
- Circumferential SH wave /
- Dispersion /
- Hollow cylinder

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