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中南大学学报(自然科学版)

Journal of Central South University

第51卷    第8期    总第312期    2020年8月

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文章编号:1672-7207(2020)08-2143-09
混凝土泵送管道振动监测与分析
杜婷,王本武,叶豪,徐明利,李智莹

(华中科技大学 土木工程与力学学院,湖北 武汉,430074)

摘 要: 为了实时掌握混凝土泵送状态,避免泵管振动位移过大而发生泵送故障或爆管事故,采用试验和理论分析相结合的方法研究混凝土泵送过程中泵管振动特征。在混凝土泵管控制截面上布置加速度传感器,以动态采集方式获取泵送过程中泵管控制截面的振动加速度,并采用IIR切比雪夫II型数字滤波器对采集的加速度数据进行降噪处理,通过时域积分计算获取泵管控制截面的振动速度和振动位移;在此基础上分析泵管泵送过程中的振动加速度和振动位移的变化规律。研究结果表明:在正常泵送阶段,靠近泵源处泵管振动加速度周期性不明显,但随着泵管延伸,泵管振动加速度变化的周期性加强;混凝土泵送时泵管以X方向振动为主,并定义了位移特征系数λx表征泵管的振动状态;泵管控制截面的最大加速度与泵送压力有良好的相关性,泵送压力越大,泵管振动的最大加速度越大;在正常泵送条件下,泵管控制截面的振动加速度在一定范围内变化,且泵管的振动位移与泵压呈线性关系,第1段水平直管振动位移最大,经过弯管后泵管振动位移大幅降低并趋于稳定。泵管振动监测及分析能及时发现混凝土泵送异常状态,泵送管道的支撑形式、位置及弯管对泵管振动加速度和振动位移影响较大。

 

关键词: 混凝土;泵送管道;振动加速度;动态采集;振动位移

Monitoring and analysis of vibration of concrete pumping pipe
DU Ting, WANG Benwu, YE Hao, XU Mingli, LI Zhiying

School of Civil Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Abstract:In order to master the concrete pumping state and avoid the pumping failure or pipe burst caused by the excessive vibration displacement of pumping pipe, the variation characteristics of pumping pipe in the process of concrete pumping were studied by experimental and theoretical analysis. The vibration acceleration of the control section of the concrete pumping pipe was acquired dynamically by arranging the acceleration sensors on the control sections of the concrete pumping pipe, but the collected acceleration data should be treated by reducing the noise firstly using IIR Chebyshev II Digital filter, then the vibration velocity and vibration displacement of the control section of the pump pipe were obtained by time domain integral calculation. Based on the calculation results, the variation laws of vibration acceleration and displacement of pumping pipe in the concrete pumping process were analyzed. The results show that during the normal pumping process, the vibration acceleration periodicity of the pumping pipe which is close to the pump source is not obvious, but it becomes more obvious with the extension of the pumping pipe. Moreover, the vibration of pumping pipe is mainly in X direction during the concrete pumping construction, and the displacement characteristic coefficients λx of the control section is defined to reflect the vibration state of the pipe. The maximum acceleration of the pumping pipe has a good correlation with the pumping pressure. The greater the pumping pressure is, the greater the maximum acceleration is. Under the normal pumping condition, the vibration acceleration of the pumping pipe varies in a certain range and the vibration displacement is in linear relation with the pumping pressure. The vibration displacement value of 1# horizontal straight pipe is the largest, then it is greatly reduced and finally keeps stable after pumping through the elbow. The abnormal pumping can be found in time through the vibration monitoring and analysis of the pumping pipe, and the support form, position of the pumping pipe and elbow have a great influence on the vibration acceleration and vibration displacement of the pumping pipe.

 

Key words: concrete; pumping pipe; vibration acceleration; dynamic acquisition; vibration displacement

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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