供水管道振动分析方法研究

发布时间：2018-03-18 14:46

本文选题：供水管道　切入点：振动　出处：《沈阳工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：伴随着城镇化步伐不断加快城市人口也不断怎加，为满足住房需要，高层建筑随之兴起，高层住宅虽然能够满足居民的住房需求，但是还有诸多问题需要解决。其中供水管道噪声问题越来越受到人们的重视。供水管道引发的噪声会轻易地穿透墙壁，损害居民健康，甚至在夜间会让人无法休息。建筑单位在施工时，又会忽略管道振动所引发的噪声，这就造成居民入住后还要对管道系统再次进行隔声处理，这样既浪费金钱、又浪费资源。问题严重时甚至还要对管道进行重新设计并改造，这样也增加了这栋建筑的安全隐患。因此有供水管噪声应该急需得到解决。本文主要阐述了有关供水管道压力振动的产生机理、压力振动建模、仿真计算，并结合弦振动方程从管道外部对管道进行压力振动分析，并对分析结果进行了对比验证。在管道降噪方面，本文主要介绍了几种常见的降噪方法，指出这几种方法的优缺点，并提出了自己的设想。论文引入弦振动方程求解管道压力振动，将固定在墙上的每一节管道视为两段固定的弦，，当管道发生振动时本身会发生抖动，这就相当于有人波动了张紧的弦，而波动弦的外力就是管道的压力振动。通过ANSYS软件对管道进行模态与振型分析得出了前五阶模态与振型，推导出振型的数学表达式。将表达式带入弦振动方程并且应用Matlab软件计算压力振动，得出的结果与其他论文进行比较结果大致相同，从理论上证明了这种方法的可行性。这种方法能够实现从管道外部测量管道的压力振动，并且能够对比管道各处的压力振动大小来判断振动产生的位置以便于治理管道振动。关于管道问题还应该结合现有方法进行综合治理，对于高层管道应该把研究的重点放在污水流速上，使之能够根据居民用水量进行自动调控，并且结构简单、安全，只有这样才能够从根本上解决管道的噪声问题。
[Abstract]:With the pace of urbanization speeding up the urban population is also constantly increasing, in order to meet the housing needs, high-rise buildings rise, although high-rise housing can meet the housing needs of residents, But there are still many problems to be solved. Among them, the noise problem of the water supply pipeline has been paid more and more attention. The noise caused by the water supply pipe can easily penetrate the wall and harm the health of the residents. Even at night, people can't rest. When building units are building, they ignore the noise caused by the vibration of the pipes, which results in the residents having to deal with the pipes again after they move in, which is a waste of money. A waste of resources. If the problem is serious, the pipeline will even have to be redesigned and modified. Therefore, the noise of water supply pipes should be solved urgently. This paper mainly expounds the mechanism of pressure vibration of water supply pipeline, the modeling of pressure vibration, and the simulation calculation. Combined with the string vibration equation, the pressure vibration of the pipeline is analyzed from the outside of the pipeline, and the analysis results are compared and verified. In the aspect of pipeline noise reduction, this paper mainly introduces several common noise reduction methods, and points out the advantages and disadvantages of these methods. In this paper, the chord vibration equation is introduced to solve the pressure vibration of the pipeline. Each pipe fixed on the wall is regarded as two fixed chords, and the vibration will occur when the pipeline vibrates. This is equivalent to the wave of the tensioned string, and the external force of the wave string is the pressure vibration of the pipeline. The first five modes and modes of the pipeline are obtained by the analysis of the modes and modes of the pipeline by the ANSYS software. The mathematical expression of vibration mode is derived. The expression is introduced into the string vibration equation and the pressure vibration is calculated by using Matlab software. The results obtained are approximately the same as those obtained in other papers. The feasibility of this method is proved theoretically. This method can measure the pressure vibration of pipeline from outside. And can compare the pressure vibration around the pipeline to determine the location of the vibration to facilitate the control of pipeline vibration. The pipeline problems should be combined with the existing methods for comprehensive treatment. In order to solve the problem of pipe noise, the research should focus on the flow rate of sewage, which can be adjusted automatically according to the amount of water consumed by the residents, and the structure is simple and safe, only in this way can the noise problem of the pipeline be solved fundamentally.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU821;TB535

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