Structures in shipbuilding, both above and below water, are used in the harshest natural conditions. Salt water, a wide range of air and water temperatures (from Arctic cold to tropical heat), climatic conditions, stormy sea surfaces, and the occasional appearance of floating obstacles, such as icebergs, place increased demands on the design of structures, the failure of which can lead to catastrophic consequences. These requirements are virtually the same for all types of vessels. Whether it is a small fishing or pleasure boat, a luxury passenger ferry, a high-speed racing catamaran, or a huge tanker, regardless of the vessel's purpose, nothing should be overlooked. In addition, vessels used for defense and national security purposes are subject to additional requirements, such as protection against the danger of underwater explosions (UNDEX). Vessels are highly complex structures comprising many multifunctional subsystems that must work together in a coordinated manner in harsh environmental conditions. In all circumstances, safety, performance, reliability, and durability must be balanced against weight, efficiency, cost, and environmental impact. The effective use of realistic simulation is key to the success of any marine system design/development/evaluation process. The use of Unified FEA tools helps accelerate development cycles, safely and efficiently manage massive calculations, and test new designs, reducing development time and the financial costs associated with destructive testing. The SIMULIA multi-functional platform with Abaqus Unified FEA for realistic simulation enables interdisciplinary collaboration. This reduces design cycles,
