Reduction in capacity of steel wire rope slings subjected to forced bending

Wire rope slings are commonly used lifting tools in all sorts of engineering applications. Usually, slings are either loaded axially or they are bent around a load bearing element such as a shackle or pipe. In the latter case, the combination of bending and axial loading introduces additional stresses within the wire rope that cause a...

Comparative Fatigue Analysis of a Tidal Turbines Support Structure

Local Buckling and Collapse of Thick-Walled pipe

Heerema Marine Contractors is an offshore contractor who specializes in the installation and removal of a range of offshore facilities. This includes the installation of submarine pipelines in excess of 1500 [m] water depth. Higher water depths drive the pipeline designs to increase wall thickness. Another motive to apply a low D/t ratio is to...

Servicing the Arctic. Report 3: Design of an Arctic Offshore Supply Vessel (AMTSV)

Background To design a ship its specific design requirements are to be known. These are, together with class notations, specified in previous reports and extended in this report. Since the requirements are formed iteratively, design freedom is possible. This is used to implement several innovations into the design which improve the performance...

Servicing the Arctic. Report 2: Evaluation of Damen Concepts in Arctic Conditions: Concepts Survey

Background At the start of a design it is often good to look at comparable designs. What choices were made, what are the operations, what equipment is used? This report looks at three Damen ships, which are already capable of offshore support. These vessels are designed for open water. Looking just at what has to improve for operating in the...

Servicing the Arctic. Report 1: Design requirements and operational profile of an Arctic Offshore Support Vessel: Literature Survey

Background The Dutch maritime industry has only limited knowledge about Arctic engineering, in spite of a growing market and interest by the oil and gas industry. This literature survey is the first in a series of three reports to develop a concept design of an Arctic Offshore Support Vessel (AOSV). The purpose is to give a perspective on Arctic...