Natural gas pipeline aerial crossing (NGPAC), also called natural gas pipeline bridge, is an important structure for gas transmission pipelines crossing special areas that are not suitable for trenchless technologies. The typical types of large-scale NGPACs are suspension and cable-stayed pipeline bridges. During the pigging process, suspension and cable-stayed NGPACs prong to strong vibration and large displacement due to the dynamic loads generated by the moving pig and the liquid column running in front of the pig. This paper provides a review of the most relevant research progress related to the study of the dynamic response of NGPACs during the pigging process. The application history of the suspension and cable-stayed NGPACs is introduced. Also, the research progress regarding the experimental studies, pigging load simulation, and the dynamic response of the NGPAC during the pigging process are comprehensively reviewed. Besides, the research challenges of every research aspect are also discussed according to the review results. The overall research status is that there have been simulation findings of the dynamic response of NGPACs during the pigging process. But the two-phase flow-induced fluid–structure coupling vibration of a complex structure which is the core issue of the problem has not been well solved by both the theoretical and the numerical simulation research. This is jointly caused by the lack of experimental research, lack of simulation studies of the pigging load applicable to vibrated pipelines, and insufficient research of the two-phase flow fluid–structure interaction process. The systematical and joint research should be carried out based on the above three aspects to comprehensively simulate the fluid–structure interaction response and possible resonance of NGPACs during the pigging process. The findings are of great significance for reviewing the existing research findings, future research challenges and to improve the safety management of NGPACs.

天然气管道架空穿越（NGPAC），又称天然气管道桥，是跨越不适合非开挖技术的特殊区域的输气管道的重要结构。大型 NGPAC 的典型类型是悬索和斜拉管桥。在清管过程中，由于清管器移动和运行在清管器前面的液柱产生的动态载荷，悬挂式和斜拉式 NGPAC 会产生强烈的振动和大的位移。本文综述了与NGPACs在清管过程中的动态响应研究相关的最相关研究进展。介绍了悬挂和斜拉NGPAC的应用历史。此外，关于实验研究、清管负载模拟的研究进展，并对清管过程中 NGPAC 的动态响应进行了全面审查。此外，还根据综述结果讨论了各个研究方面的研究挑战。总体研究现状是，已有NGPACs在清管过程中动态响应的模拟结果。但是复杂结构的两相流致流固耦合振动这一问题的核心问题在理论和数值模拟研究中都没有得到很好的解决。这是由于缺乏实验研究，缺乏适用于振动管道的清管载荷的模拟研究，以及对两相流流固耦合过程研究不足共同造成的。应基于以上三个方面进行系统的联合研究，综合模拟清管过程中NGPACs的流固耦合响应和可能的共振。研究结果对于回顾现有研究成果、未来研究挑战以及改进NGPAC的安全管理具有重要意义。