非周期型理想钻柱系统声传播特性研究  

Propagation characteristics of acoustic wave along a non-periodic ideal drill string system

作　　者：张美玲[1] 闫向宏[1] 刘文丽[1] 苏远大[1] 陈雪莲[1] 路斌[1] 

机构地区：[1]中国石油大学(华东)物理科学与技术学院,山东东营257061

出　　处：《振动与冲击》2012年第1期72-75,共4页Journal of Vibration and Shock

基　　金：山东省自然科学基金(ZR2009EL006);中央高校基本科研业务费专项资金(10CX04045A);中国石油科技创新基金(2009D-5006-03-03)资助项目

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。The non-periodic structure＇s dispersion equation and sound attenuation equation were derived based on one-dimensional model of sound propagation. The relationship between the geometry parameters of a non-periodic drill string system and its dispersion characteristic as well as its attenuation characteristic was investigated numerically, and the FEM software ANSYS was used to verify the theoretic results. The study results Showed that the dispersion characteristic of a non-periodic drill string system is identical with that from and operation of dispersion characteristics of several periodic structure systems ; the non-periodic structure＇s passband is narrow while its stopband is wide ; if the sound wave frequency is located within its stopband, the acoustic attenuation is larger.

关 键 词：非周期型结构 频散特性 声衰减系数 钻柱系统 

分 类 号：TE21[石油与天然气工程—油气井工程]