Numerical simulation analysis of vibration of the superstructure structure of a semi-submersible platform

Abstract

Since the 21st century, scientific and technological progress has significantly advanced human civilization. Industrialization has led to the depletion of terrestrial resources and prompted humanity to seek new sources of energy. China established the China National Offshore Petroleum Corporation in 1982 and began to introduce innovative offshore oil and gas technologies. Semi-submersible offshore platforms are key facilities. In 2012, the Ministry of Industry and Information Technology issued a "Manual for the construction of marine engineering equipment." In 2017, China built the Blue Whale-1 deepwater drilling platform. Marine engineering equipment and high-tech vessels are the key to the national maritime strategy and the strategy of "Scientific and Technological Power" and "Made in China". The offshore drilling platform includes an upper deck, bulkheads, struts and a floating hull. The deck is divided into two floors and is equipped with drilling rigs, lifting equipment, a tower, rescue equipment, an aircraft platform and a mud system. The platform is exposed to wind, waves, ice and vibration of the equipment. The upper deck is the main activity of the staff. Excessive vibration can cause resonance, damage health and equipment, and cause structural fatigue. This study focuses on the safety of offshore platform structures, the reliability of precision instruments and the comfort of personnel, as well as the vibration characteristics of superstructure structures, which is of great importance for the development of a new generation of offshore platforms.