DYNAMIC STRESS ANALYSIS AND SUSPENDED SPAN MANAGEMENT FOR THE CROSSING RIVER OIL AND GAS PIPELINE

In view of the frequent occurrence of burst and leakage accidents of crossing river oil and gas pipelines, it is important to analyze the mechanical characteristics of the oil and gas pipelines and their safety prevention and control measures. Based on the vibration failure criteria, this paper determines the maximum safety dangling length of the pipe. The ABAQUS software is used to determine the dynamic stress during the level suspended period of the oil pipeline which is in the bottom of the river and it is shown that the length of the single span suspended pipe shall not be greater than 0.65 of the suspended section, and during the process of the load application, the vibration failure happens first, followed by the yield failure. According to the maximum length of the suspended pipeline, the steel structure support method is used to deal with the safety issues due to a too long pipeline span length.