非周期型理想钻柱系统声传播特性研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (1) : 72-75.

论文

非周期型理想钻柱系统声传播特性研究

张美玲; 闫向宏; 刘文丽; 苏远大; 陈雪莲; 路斌

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The characteristics of acoustic wave propagation along the non-periodic ideal drill strings

ZHANG Mei-ling; YAN Xiang-hong; LIU Wen-li; SU Yuan-da; CHEN Xue-lian; LU Bin

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文章历史 +

摘要

基于一维声传播理论推导出了非周期型理想钻柱系统的频散方程和透射波声衰减方程，数值计算了非周期型钻柱系统几何参量与其频散特性、声衰减特性之间的关系，并利用有限元ANSYS对非周期型理想钻柱系统的声传播特性的结果进行了验证。研究结果表明：非周期型理想钻柱系统的频散特性与多个周期性结构系统频散特性相“与”的结果一致，具有通带较窄而阻带较宽，且频率在阻带范围内的声波沿钻柱传播时声衰减较大的特性。

Abstract

The non-periodic structure’s dispersion equation and the sound attenuation equation have been given based on the one-dimensional model of sound propagation. The relationship between the geometry parameters of drill strings with the dispersion characteristic as well as the attenuation characteristic is investigated numerically for a non-periodic drill string system, and the FEM software- ANSYS were used to confirm the theory results. The results shows that the dispersion characteristic of a non-periodic drill string system is identical with the result from of 'and' operation of dispersion characteristic of multiple periodic structure systems．The non-periodic structure’ passband is narrow while the stopband is wide, If the sound wave frequency were in the stopband, the acoustic attenuation would be larger than it in passband.

导出引用

张美玲;闫向宏;刘文丽;苏远大;陈雪莲;路斌. 非周期型理想钻柱系统声传播特性研究[J]. 振动与冲击, 2012, 31(1): 72-75

ZHANG Mei-ling;YAN Xiang-hong;LIU Wen-li;SU Yuan-da;CHEN Xue-lian;LU Bin. The characteristics of acoustic wave propagation along the non-periodic ideal drill strings[J]. Journal of Vibration and Shock, 2012, 31(1): 72-75