城市地下管网漏损发声机理及结构风险诊断方法研究

Buried pipelines are the lifeline of modern city, to protect the city production and life is essential, pipeline damage and damage caused by a large number of accidents and losses, and even lead to the interruption of urban operation. In recent years, the identification of urban underground pipe network leak detection, location and dynamic risk assessment has become a hot issue, for pipeline leak sound detection as a focus on the development of the industry a lot of attention and research, but the existing domestic and foreign pipeline leakage Sound detection and identification technology has a bottleneck problem, cannot damage the pipeline performance and damage to the mechanical properties of the analysis, which greatly limits the application of sound signal detection technology and development. Therefore, it is of great practical significance to avoid the accident and loss, to reduce the risk of disaster and to ensure the operation of the city, and to establish the related characteristics of the leaky sound signal and the disruption characteristics of the pipeline. The project is based on the urban underground pipeline system. By revealing the damage mechanism of the pipeline, the failure criterion of the damage structure of the pipeline structure and the failure criterion of the structural failure are put forward. The safety risk assessment model of pipeline damage detection and structural operation is proposed, which is a timely and scientific Decision analysis to provide theoretical methods and technical demonstration.

城市地下管网是保障城市生产和生活的生命线工程设施，一旦管网及管道结构破损将则会发生泄漏、爆管等事故。地下管网管道漏损智能检测与结构安全诊断是国内外研究热点。通过分析地下管道结构破坏几何特征及因素，研究管道漏损发声机理与结构破损失效机制，建立管道破损状态与环境荷载耦合作用声学模拟数值分析方法；利用室内管道相似试验和室外现场管网多工况测试，研究建立有压管道漏损发声机理和结构破损特征关联物理方程，构建管道基于漏损声学检测的结构安全智能诊断方法；提出地下管道漏损检测特征识别算法，发展复杂环境中地下管道漏损检测与结构安全多参量声音精准诊断技术。项目在有压管道漏损发声机理理论模型和试验方法进行创新并应用，建立管网漏损信号和管道结构安全诊断方法，实现地下管网运行安全智能检测与结构风险评估突破，研究体现多学科交叉特色，成果对保障城市市政管网安全具有重要理论和工程意义，并为市政管网运行风险管控提供科技支撑。

城市地下管网是保障城市生产、生活和生态的重要基础设施，一旦管网及管道结构破损将则会产生泄漏、爆管等事故，造成严重的经济损失和社会危害。地下管网管道漏损智能检测与结构安全诊断是国内外研究热点。项目通过分析地下管道结构破坏几何特征及因素，研究管道漏损发声机理与结构破损失效机制，建立管道破损状态与环境荷载耦合作用声学模拟数值分析方法；利用室内管道相似试验和室外现场管网多工况测试，研究建立有压管道漏损发声机理和结构破损特征关联物理方程，构建管道基于漏损声学检测的结构安全智能诊断方法；提出地下管道漏损检测特征识别算法，发展复杂服役环境中地下管道漏损检测与结构安全多参量声音精准诊断技术。项目在有压管道漏损发声机理理论模型和试验方法进行创新并应用，建立管网漏损信号和管道结构安全诊断方法，实现地下管网运行安全智能检测与结构风险评估突破，研究体现多学科交叉特色，成果对保障城市市政管网安全具有重要理论和工程意义，并为市政管网运行风险管控提供科技支撑。