Ice-induced vibration is a significant risk factor for the operational safety and structural stability of offshore oil platforms. If the hazards posed by sea ice, currents, and other environmental loads are not properly assessed, offshore platforms may suffer catastrophic consequences such as collapse, oil spills, and casualties. Due to the uncertainty of ice load and ice-induced vibration, traditional numerical analysis and statistical prediction methods struggle to simultaneously meet the requirements for high-precision early warning and timeliness in ice-induced vibration risk assessment. Therefore, based on the measured winter sea environment data of the JZ20-2MUQ platform in the Bohai Sea, this paper uses the interpretive structural model (ISM) and the expectation maximization (EM) algorithm to construct a Bayesian network model. Quantitative analysis indicates that the main risk factors affecting the vibration of the offshore oil platform in the Bayesian network are ice thickness, ice velocity, ice direction, wind speed, and tidal flow velocity and direction. Furthermore, the accuracy and validity of the model are verified. The average accuracy of the model is over 0.75, and the accuracy of the target node is above 0.9. Verification results confirm that the model has high accuracy and can provide reliable data support for risk prediction.

This article summarizes the four main stages of the development of international ocean scientific drilling: deep sea drilling project, international ocean drilling program, integrated ocean drilling program and international ocean discovery program, and introduces the main scientific achievements obtained during each stage. China also participated in the above stages, leading four voyages across three ocean scientific drilling projects, and achieved a series of scientific achievements in the South China Sea. The development of international ocean scientific drilling is closely related to the development of ocean drilling vessels. The development of worldwide ocean scientific drilling equipment is chronologically introduced with a focus on the technical characteristics of China's first ocean scientific drilling vessel, the “Mengxiang”. Finally, the development of the ocean scientific drilling technology is analyzed based on the development history of the ocean drilling and the update and iteration of the ocean drilling vessels. It can provide references for the development of the international ocean scientific drilling.

The influence of the shape and the size of the moonpool on the vulnerability criteria assessment of the parametric roll and the excessive acceleration in the second generation stability has been analyzed for a drillship. This article considers the drillship with three moonpools of different opening shapes and different sizes to verify and analyze whether the drillship meets the second generation intact stability criteria under development. The analysis results indicate that the variation in the shape and size of the moonpool can affect the parameters of the vulnerability criteria of the parametric roll and the excessive acceleration for the drillship. The drillship with the moonpool of the shapes and sizes considered in this study can meet the criteria requirements. It can provide reference for the design of the drillship's moonpool.