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Petroleum Science >2016,??Issue 1:??126-134 DOI: https://doi.org/10.1007/s12182-015-0063-4

Nonlinear dynamic analysis and fatigue damage assessment for a deepwater test string subjected to random load Open?Access

文章信息

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作者：Deepwater test string Pipe-in-pipe model Random wave Nonlinear vibration Fatigue damage
作者單位：

Kang Liu,Guo-Ming Chen,Yuan-Jiang Chang,Ben-Rui Zhu,Xiu-Quan Liu and Bin-Bin HanCentre for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao 266580, Shandong, China;Centre for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao 266580, Shandong, China;Centre for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao 266580, Shandong, China;Centre for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao 266580, Shandong, China;Centre for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao 266580, Shandong, China;Centre for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao 266580, Shandong, China

投稿時(shí)間：2015-12-01 00:00:00.0
引用方式：Liu, K., Chen, GM., Chang, YJ. et al. Pet. Sci. (2016) 13: 126. https://doi.org/10.1007/s12182-015-0063-4

文章摘要

The deepwater test string is an important but vulnerable component in offshore petroleum exploration, and its durability signi?cantly affects the success of deepwater test operations. Considering the in?uence of random waves and the interaction between the test string and the riser, a time-domain nonlinear dynamic model of a deepwater test string is developed. The stress-time history of the test string is obtained to study vibration mechanisms and fatigue development in the test string. Several recommendations for reducing damage are proposed. The results indicate that the amplitude of dynamic response when the string is subjected to random loads gradually decreases along the test string, and that the von Mises stress is higher in the string sections near the top of the test string and the ?ex joints. In addition, the fatigue damage ?uctuates with the water depth, and the maximum damage occurs in string sections adjacent to the lower ?ex joint and in the splash zone. Several measures are proposed to improve the operational safety of deepwater test strings: applying greater top tension, operating in a favorable marine environment, managing the order of the test string joints, and performing nondestructive testing of components at vulnerable positions.

關(guān)鍵詞

    Deepwater test string Pipe-in-pipe model Random wave Nonlinear vibration Fatigue damage