管道泄漏检测的水力瞬变全频域数学模型  

Hydraulic transient model in frequency domain for leak detection in pipeline systems

作　　者：郭新蕾[1] 杨开林[1] 

机构地区：[1]中国水利水电科学研究院水力学研究所,北京100038

出　　处：《水利学报》2008年第10期1264-1271,1278,共9页Journal of Hydraulic Engineering

基　　金：国家自然科学基金(50679085);国家社会公益专项基金(126301041003);中国水利水电科学研究院专项基金(水集05KY01)

摘　　要：输水管道泄漏孔的存在及其位置直接影响着系统压力波形的畸变和衰减特性,通过分析有、无泄漏时任意位置处的压头频域特性可使泄漏检测成为可能。在考虑非恒定摩阻影响的基础上,提出基于水力瞬变全频域数学模型的泄漏检测反问题分析方法。用拉氏频域变换处理边界条件和实测数据,并将遗传算法用于频域反问题模型的求解,在寻优速度上比传统的瞬变时域分析的方法有了较大的改善。算例表明基于水力瞬变全频域数学模型分析的管道泄漏检测是一种有效的新方法。Based on the fact that leaks may directly affect the damping and aberration characteristics of hydraulic transient pressure waveforms in pipeline system, the location and leakage can be determined by analyzing the difference of transient water head response between system with leak and system without leak in frequency domain. Considering the effect of unsteady friction the inverse transient analysis method is established based on the transient model in frequency domain. The discrete boundary conditions and observation data are transformed into the frequency domain by Laplace transform. The genetic algorithm is integrated into the method to improve the optimization speed. An example is given for demonstration of this method.

关 键 词：泄漏检测 瞬变 频域变换 反问题分析 遗传算法 

分 类 号：TV131.4[水利工程—水力学及河流动力学]