周期性轴对称凹槽结构隔声特性数值模拟

计算物理 ›› 2010, Vol. 27 ›› Issue (6): 869-876.

周期性轴对称凹槽结构隔声特性数值模拟

闫向宏, 苏远大, 孙建孟, 庄春喜, 张美玲

中国石油大学(华东)地球资源与信息学院, 山东东营 257061

收稿日期:2009-07-02 修回日期:2010-02-01 出版日期:2010-11-25 发布日期:2010-11-25
作者简介:国向宏(1966-),男,陕西蓝田,博士,从事声波测井方法研究.
基金资助:
国家高技术研究发展计划(2007AA06Z232);中国石油科技创新基金(2009D-5006-03-03);山东省自然基金(ZR2009EL006)资助项目

Acoustic Characteristics of Axisymmetric Periodic Groove Structures

YAN Xianghong, SU Yuanda, SUN Jianmeng, ZHUANG Chunxi, ZHANG Meiling

School of Geo-resources and Information, China University of Petroleum, Dongying 256072, China

Received:2009-07-02 Revised:2010-02-01 Online:2010-11-25 Published:2010-11-25

摘要/Abstract

摘要： 提出一种在钻铤上切割周期性轴对称凹槽方式构建隔声体,消除钻铤模式波的方法.结果表明,其隔声效果与凹槽深度H、长度L、凹槽数目N、凹槽截面形状以及钻铤壁厚有关.选择矩形截面凹槽、减小钻铤壁厚、增加凹槽深度都可有效提高隔声体的隔声效果,该结构最高可获得约36 dB的声衰减,基本满足随钻声波测井仪器对隔声效果要求.

关键词: 随钻声波测井, 隔声体, 周期性结构, 钻铤波

Abstract: A sound isolator with axisymmetric periodic groove structures is given for eliminating drill collar wave.Sound isolation effect with different groove's depth (H),length,number,section shape and thickness of the drill collar is studied.With rectangle section shape,decreasing thickness of the drill collar and increasing H,isolation effect of the acoustic isolator can be increased.It can get a maximum of 36 dB sound attenuation which meets requirement of the sound isolator in LWD.

Key words: logging while drilling, acoustic isolator, periodic structure, drill collar wave

中图分类号:

TB51

闫向宏, 苏远大, 孙建孟, 庄春喜, 张美玲. 周期性轴对称凹槽结构隔声特性数值模拟[J]. 计算物理, 2010, 27(6): 869-876.

YAN Xianghong, SU Yuanda, SUN Jianmeng, ZHUANG Chunxi, ZHANG Meiling. Acoustic Characteristics of Axisymmetric Periodic Groove Structures[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2010, 27(6): 869-876.