基金Supported by Project Supported by National Key Research and Development Program of China(No.2018YFC0310400)National Natural Science Foundation of China(51779109)+2 种基金Natural Science Foundation of Jiangsu,China(BK20171306)Special Project for Innovation for ‘Seventh Generation Ultra-Deepwater Drilling Platform(Ship)’ Supported by High-Tech Ship of Ministry of Industry and Information TechnologySpecial Project for Innovation for ‘Research and Development of Deepwater Semi-Submersible Support Platform’ Supported by High-Tech Ship Ministry of Industry and Information Technology