Journal
JOURNAL OF MARINE SCIENCE AND ENGINEERING
Volume 7, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/jmse7040086
Keywords
jacket platform; ice-induced vibration; failure mechanism; ice-resistant cone
Categories
Funding
- National Natural Science Foundation of China [51679033]
- National Key Research and Development Plan [2017YFF0210700, 2016YFC0303400]
- Fundamental Research Funds for Dalian University of Technology [DUT18LK49]
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The jacket platform in the Bohai Sea oilfield is an important engineering development, offering design alternatives in this economically important region. However, ice-induced vibration in cold areas threatens the safety and operation of these platforms. On two occasions, intense ice-induced vibrations triggered the rupture of a well's blow down pipeline, loosening the flanges on the Bohai platform, and leading to the ejection of high-pressure natural gas. Subsequent mechanical analysis of the failed parts helped define the mechanism of failure and identified the failure criteria, based on a prototype structure monitoring system. The analysis revealed that the deck's inertial force, which resulted in ice-induced steady-state vibration, was the major cause of the accident. Three fixed cones were thus installed on the platform the following winter, effectively reducing the vibrations.
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