摘要
城市供水安全作为韧性城市体系的重要组成部分而备受重视。在城市输水系统中,水锤是影响其安全运行的重要因素。文章提出了城市输水系统应对水锤的韧性这一概念,基于管道失效概率并通过蒙特卡洛算法建立起系统韧性的量化评价指标。结合泵站加压输水系统实例,对两阶段关闭空气阀这一水锤防护方案,以韧性指标为评价标准,采用正交试验方法优化空气阀的参数设置。结果表明:空气阀的设置可提高系统应对水锤的韧性,其工作参数对韧性的影响是交互的;本研究中输水系统适宜的空气阀工作参数分别为:口径100 mm,进气系数0.6,排气系数0.1,孔口面积比0.2,临界压力比1.10。
The safety of urban water supply is highly valued as an important component of resilient urban systems.In urban water distribution systems,water hammer is an important factor affecting their safe operation.The article proposes the concept of resilience of urban water distribution systems against water hammer,and establishes a quantitative evaluation index for system resilience based on the probability of pipe failure through a Monte Carlo algorithm.In the case of a pumping station pressurised water distribution system,a two-stage closure of the air valve is used as the evaluation criterion for water hammer protection,and the parameters of the air valve are optimized using an orthogonal test method.The results show that the setting of the air valve can improve the resilience of the system in response to water hammer,and its operating parameters have an interactive effect on the toughness;the suitable operating parameters of the air valve for the water distribution system in this study are:100 mm bore,intake coefficient 0.6,exhaust coefficient 0.1,orifice area ratio 0.2 and critical pressure ratio 1.10,respectively.
作者
宗琦
许仕荣
ZONG Qi;XU Shi-rong(School of Civil Engineering,Hunan University,Changsha,410082,China)
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2023年第6期120-127,共8页
Journal of Natural Science of Hunan Normal University
基金
国家重点研发计划项目(2016YFC0400604)。
关键词
城市输水系统
水锤
失效概率
韧性
蒙特卡洛算法
空气阀
urban water distribution systems
water hammer
probability of failure
resilience
Monte Carlo algorithm
air valve
