COMPARISON WITH CALCULATIONS OF SUBMARINE PIPELINE CRITICAL SPAN BY DIFFERENT METHODS
Critical span of submarine pipeline is calculated by three methods, which include static method, avoiding vortex vibration method and DNV-RP-F105 based on Miner linear accumulated fatigue damage. Given by example, characteristics of the methods are analyzed in this paper. Static method is idealized because environmental factors are not considered. Stress in the span is analyzed with method that maximum bending stress is less than allowable stress, and critical span is calculated. Static method is not complete. In addition to static stress, dynamic stress derived from vortex induced vibration should be considered in course of calculating critical span. Avoiding vortex vibration method is more developed than static method. The third method is DNV-RP-F105 based on Miner linear accumulated fatigue damage. Environmental factors such as flows, waves, wind seabed situation and etc. are considered in the method compared with the above methods. Results of the third method are much different from the others because 100 year return period value in the example of Hangzhou bay is much higher than routine value. The third method should apply to calibrate practical span.
Xuechao Wang Jianping Zhao
Nanjing University of Technology, No.5 XinMoFan Road, Nanjing, 210009.
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）