本文關(guān)鍵詞：基于信號處理算法的供水管網(wǎng)物理漏損流量分析模型研究　出處：《哈爾濱工業(yè)大學(xué)》2015年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 供水管網(wǎng) 物理漏損 物理漏損流量分析模型 壓力管理 盲源分離

【摘要】：供水管網(wǎng)漏損造成巨大的水資源浪費(fèi)、降低了供水企業(yè)收益,而物理漏損又是漏損的主要部分,研究供水管網(wǎng)物理漏損流量分析模型,對于指導(dǎo)供水管網(wǎng)漏損控制、特別是合理評估壓力管理作用,有重要的理論意義與工程應(yīng)用價值�，F(xiàn)階段,以指數(shù)類模型為代表的模型由于缺乏校核所需數(shù)據(jù),在工程應(yīng)用中效果并不理想。因此,如何用新的理論和方法豐富和完善供水管網(wǎng)物理漏損流量分析模型是供水管網(wǎng)漏損控制的重要研究內(nèi)容。本文研究供水管網(wǎng)由局部到全局,借助于運(yùn)行工況實(shí)驗(yàn),首先研究單個漏點(diǎn)的漏損指數(shù)取值規(guī)律,進(jìn)而采用信號處理算法建立了供水管網(wǎng)物理漏損流量分析模型。通過實(shí)驗(yàn)研究了漏點(diǎn)漏損穩(wěn)定性、漏點(diǎn)特性、管道粘彈性、出流條件對物理漏損的影響;通過承壓管道的應(yīng)力分析,綜合分析漏點(diǎn)塑性形變與彈性形變,經(jīng)過公式推導(dǎo),建立了改進(jìn)FAVAD模型,該模型中的參數(shù)物理意義明確,能有效指導(dǎo)漏損控制;針對同水頭下升壓過程比降壓過程物理漏損流量要小的實(shí)驗(yàn)現(xiàn)象,提出了降-復(fù)壓漏損控制技術(shù),建立了降-復(fù)壓漏損控制模型,并用粘彈性理論對模型機(jī)理做了闡釋。綜合實(shí)驗(yàn)研究及模型分析,漏損指數(shù)取值規(guī)律為:圓形、矩形、弧形漏口為0.5~0.6;軸向裂縫為0.5~2.5,環(huán)向裂縫為0.5~1.5;對于軸向裂縫和不固定管道上的環(huán)向裂縫,管道內(nèi)徑越大、管道壁厚越小、彈性模量越小,則漏損指數(shù)取值越大。物理漏損流量與水頭的關(guān)系是復(fù)雜的,由于漏損穩(wěn)定性、管道粘彈性,兩者具有不確定性。將供水總流量劃分為用水流量和物理漏損流量,得出兩個分流量之間具有相關(guān)性的結(jié)論。論文綜合比較盲源分離理論與濾波理論的適用性,選擇兩種理論下的三個信號處理算法:Fast ICA算法、CICA算法、Kalman濾波算法,分別建立了基于上述算法的三種供水管網(wǎng)物理漏損流量分析模型:Fast ICA模型、CICA模型、Kalman濾波模型,以實(shí)驗(yàn)室供水管網(wǎng)漏損工況實(shí)驗(yàn)所得數(shù)據(jù)進(jìn)行模型校核,相似系數(shù)依次為:0.7834、0.9454、0.3351;綜合分析11個評價指標(biāo),三種模型中CICA模型性能最好。所建CICA模型以供水管網(wǎng)總流量和管網(wǎng)入口處自由水頭為輸入?yún)?shù),并以輸入?yún)?shù)構(gòu)建參考向量,利用了分區(qū)計(jì)量供水管網(wǎng)的實(shí)時水力參數(shù),是對數(shù)據(jù)高階統(tǒng)計(jì)信息的挖據(jù)應(yīng)用,很好地解決了物理漏損流量與水頭關(guān)系的復(fù)雜性和不確定性;經(jīng)過論證,CICA模型的適用條件是供水總流量不服從高斯分布、或者即使供水總流量服從高斯分布但是管網(wǎng)入口處水頭不服從高斯分布時。針對CICA模型所得模擬量只提供波形信息,幅值大小具有不確定性的特點(diǎn),依據(jù)流量平衡原理列出了求解用水流量標(biāo)準(zhǔn)差和物理漏損流量標(biāo)準(zhǔn)差的二元一次超定方程組,研究了兩個未知量的等式約束和物理漏損流量標(biāo)準(zhǔn)差的取值范圍約束,實(shí)現(xiàn)了物理漏損流量真實(shí)幅值的還原。CICA模型的收斂性能良好,模型參數(shù)的優(yōu)化取值范圍寬泛。論文研究了針對幾類不同拓?fù)湫问焦┧芫W(wǎng)的模型應(yīng)用方法,并在實(shí)驗(yàn)室供水管網(wǎng)和實(shí)際供水管網(wǎng)中對模型進(jìn)行驗(yàn)證,結(jié)論如下:CICA模型在單水源供水管網(wǎng)中適用性能良好,平均模擬誤差小于5.0%。論文研究了CICA模型與單漏點(diǎn)研究結(jié)論的耦合應(yīng)用方法,其中單漏點(diǎn)研究主要提供漏損指數(shù)取值范圍約束,CICA模型提供指數(shù)類模型校核需要的物理漏損流量數(shù)據(jù),實(shí)現(xiàn)了指數(shù)類模型中參數(shù)的多工況數(shù)據(jù)校核,改良了其工程應(yīng)用效果。將CICA模型應(yīng)用于TJ市供水管網(wǎng)水力模型節(jié)點(diǎn)流量分配中的用水模式修正,CP鎮(zhèn)壓力管理降低物理漏損程度評估,均取得了較好的效果;論文對CICA模型進(jìn)行了評價,與其他模型模擬方法與實(shí)測方法相比,CICA模型在評估壓力管理對于物理漏損的降低程度方面優(yōu)點(diǎn)突出。
[Abstract]:The water supply pipe network water caused a huge waste of resources, reduce the benefits of water supply enterprises, while the physical leakage is the main part of the leakage, analysis model of water supply network physical leakage flow, for the guidance of water leakage control, especially the reasonable assessment of pressure management, has important theoretical significance and engineering application value. At this stage, to the index model represented by the model due to the lack of checking the data needed in the engineering application of the effect is not ideal. Therefore, how to use the new theory and method to enrich and improve the physical leakage of water supply pipe network traffic analysis model is an important research content of water leakage control. This paper studies water supply network from local to global, with the help of operation the experimental conditions, the leakage index value of single point rule first, then the signal processing algorithm to establish the physical leakage flow analysis of water supply network Model. Through experimental study the leak leakage characteristics of pipeline leak, stability, viscoelasticity, effect of flow conditions on the physical leakage; pressure pipeline through the stress analysis, a comprehensive analysis of the leakage of plastic deformation and elastic deformation, after the deduction of formula, establishes an improved FAVAD model, the physical meaning of the parameter in the model is clear, can effective guidance for leakage control; experimental phenomena with boost head is smaller than the physical leakage decompression process flow, the drop - complex pressure leakage control technology, a drop - pressure leakage control model, and the viscoelastic theory of mechanism model were explained. Analysis and model experiment, leakage exponent value law: circular, rectangle, arc chute 0.5~0.6; axial crack 0.5~2.5, circumferential cracks 0.5~1.5; for axial cracks and fixed on the pipe circumferential crack, the pipe diameter is bigger, the pipeline wall The smaller the thickness, the elastic modulus is small, then the leakage index values are smaller. The relationship between the physical leakage flow and head is complex, due to leakage of pipeline stability, viscoelasticity, there is uncertainty. The water flow into the water flow and physical leakage flow, and obtain the correlation between the two points of the flow. The applicability of the comprehensive comparison of blind source separation and filtering theory, two kinds of the theory of three signal processing algorithms: Fast ICA algorithm, CICA algorithm, Kalman filtering algorithm, respectively establish the analysis model of the algorithm of three kinds of water supply network leakage flow physics: Fast based on ICA model, CICA model, Kalman filter model, model checking by the data leakage condition of laboratory experiment, the similarity coefficient was as follows: 0.7834,0.9454,0.3351; comprehensive analysis of 11 evaluation indexes, three models in the performance of the CICA model The best. The model built by CICA with the total water supply network flow and network entrance free head as the input parameters, and the input parameters for constructing reference vector, using real-time hydraulic parameters measuring division of the water supply network is of high order statistics data mining application, a good solution to the complexity of the physical leakage flow rate and head relationship and uncertainty; after the demonstration, the applicable conditions of the CICA model is the total water flow does not obey the Gauss distribution, or even if the water flow obeys Gauss distribution network but not head at the entrance to obey the Gauss distribution. According to the CICA model the analog waveform information only, amplitude has the characteristics of uncertainty, based on the principle of flow balance list to solve the water flow standard deviation and standard deviation of the physical leakage flow two yuan a overdetermined equations of equality constraints and two unknowns of Science The range of the standard deviation of the leakage flow constraints, realized the convergence performance of.CICA reduction model of physical leakage flow amplitude of the real good, broad range of model parameter optimization. The paper studies the application method of the model for several classes of different topological forms of the water supply network, and verify the model, in the laboratory of water supply network and the actual water supply network the conclusions are as follows: CICA model for good performance in a single water source water supply network, the average error is less than 5.0%. coupled simulation application method of CICA model with single point of research conclusion, the single point research mainly provides the leakage index ranges constraint, the CICA model provides index models need to check the physical leakage flow data, realizes the multi check the condition data parameter index model, improved the effect of its application. The CICA model is applied to TJ city water supply network The water flow distribution model modified hydraulic model of node in the town of CP, pressure management to reduce the physical leakage degree evaluation, have achieved good results; the evaluation of the CICA model, compared with other model simulation method and experimental method, CICA model management to reduce the physical leakage degree has prominent advantages in the assessment of pressure.

【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TU991.33
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本文編號：1429036