Research Status on the Structural Optimization of Offshore Crane Vessel Foundations

Abstract

With the growing demand for marine resource development, offshore crane vessels, as key equipment in marine engineering, are becoming larger with enhanced lifting capacities. Consequently, the loads borne by the crane vessel foundations have increased, posing higher requirements for structural safety and lightweight design. Conducting structural optimization research on the foundations is crucial for improving load-bearing capacity, reducing weight, and lowering costs. This paper reviews the current state of research on crane vessel foundation structures. Scholars both domestically and internationally have conducted extensive studies on the strength of crane vessel foundations, focusing primarily on three aspects: material research, structural design optimization, and advancements in manufacturing processes. Studies show that the application of new materials, such as high-strength steel and composites, has improved the strength and stiffness of the foundations. Methods like finite element analysis and topology optimization have refined the structural design, enhancing load-bearing capacity and fatigue resistance. Furthermore, advanced manufacturing techniques, such as robotic welding and 3D printing, have increased the precision and quality of foundation fabrication. Based on the current research status of crane vessel foundations, two major future research trends are proposed: First, in terms of structural strength analysis, more refined models and efficient computational methods should be adopted to enhance the optimization of foundation performance. The shift from traditional ship beam theory to modern finite element analysis will improve simulation accuracy and structural strength. The focus should also be on changes in vessel size and working environment to meet more complex demands. Second, attention should be given to nonlinear and dynamic responses, considering the effects of large deformations and nonlinear behavior during actual operations. This includes addressing complex loading scenarios, such as the motion of lifted objects and wind forces, to ensure the strength and stability of the foundation.