管道中连续振动信号衰减模型与传递特性研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (19) : 84-90.

论文

刘均1,2 袁峰1

作者信息 +

Research on Signal Attenuation Model and Transfer Characteristics for Continuous Vibration Signal Inside a Pipeline

LiuJun1,2 YuanFeng2

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文章历史 +

摘要

本文借鉴电力线输电理论中的阻抗和传递系数来描述连续压力波动在管道中的传递过程，建立了基于传递矩阵的连续波衰减模型，利用特征阻抗来描述管道本体特征对波动传递的影响，并以此模型为基础，分析了连续波在管道中传递时压力和流量之间的关系、以及管道终端阻抗和倾角对波动传递的影响。通过对模型的仿真计算，得出了在管道中连续波信号传递时，管道内压力波呈驻波分布的结论，同时分析了在不同终端阻抗下波动的分布情况；通过对管道内不同频率信号的衰减情况分析，绘制了管道内信号传递的幅频特性曲线，得出了随着频率的升高，管道内信号呈波动性衰减的结论。最后通过地面验证实验，说明了不同频率信号在相同管道内的传递情况符合仿真分析，为随钻测量过程中通信频率的选取提供了理论支持。

Abstract

In this paper, impedance and transmission coefficient of power line transmission theory are used to describe the continuous pressure vibrations in the transfer process of the pipeline. The continuous wave attenuation model, which by using characteristic impedance describes the influence of the pipeline’s property on the wave propagation, is established based on the transfer matrix. According to the attenuation model, this paper analyzes the relationship between pressure and flow while the continuous waves move along the pipeline, and the influence of terminal impedance and dip angle of pipelines on the wave transmission. Through the simulation and calculation on the model, it is concluded that pressure waves are in the standing wave distribution in the pipe when the continuous wave signal is transmitting in the pipeline. At the same time, the volatility transmissions under the different terminal impedances are analyzed. The amplitude-frequency characteristic curve of the signal transmission in the pipe is mapped by analyzing the distribution in different frequency signals in the pipeline. It can get a conclusion. The conclusion is that the signal in the pipe is in the attenuation volatility with the increase of frequency. And through the experiment on the ground, the situations about signal transmission of different frequencies in the same pipe are accord with the simulation analysis. This paper provides the theoretical support for the selection about the frequency of communication in the process of measurement while drilling.

关键词

幅频特性 / 随钻测量 / 传递系数 / 水力阻抗 / 压力波动

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刘均1,2 袁峰1. 管道中连续振动信号衰减模型与传递特性研究[J]. 振动与冲击, 2015, 34(19): 84-90

LiuJun1,2 YuanFeng2. Research on Signal Attenuation Model and Transfer Characteristics for Continuous Vibration Signal Inside a Pipeline[J]. Journal of Vibration and Shock, 2015, 34(19): 84-90

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