Sensitivity of impact behaviour of RC beams to contact stiffness

Numerical study on the water impact of 3D bodies by an explicit finite element method

A failure analysis of floating offshore wind turbines using AHP-FMEA methodology

Within the scope of a changing energy market, wave energy has yet to reach a level of commercial viability that enables it to become competitive with alternative energy sources, both renewable and non-renewable. Despite the well-known advantages inherent to the resource, there are several challenges that must be overcome before wave energy gains a relevant share of the global energy market. While near-commercial stages of development are still outside the reach of most wave energy converters, it is important to find new perspectives that facilitate the development process and improve the chances of a successful deployment and operation. In this paper, a review of synergetic technologies with the potential for hybridization and/or co-location with wave energy converters is presented. Potential applications of wave energy conversion devices, within the context of nearshore and offshore niche markets that minimize/eliminate, respectively, mainland grid connection and inherent costs are also discussed. It is found that mutual gains can be attained from this complementary approach, namely in terms of infrastructure sharing, critical component protection, introduction of a beneficial shielding effect, energy storage upgrading, coastal erosion mitigation and electricity supply to various marine mobile platforms for different offshore and nearshore activities, amongst others.

On the potential synergies and applications of wave energy converters: A review

In this work, we experimentally characterize the water entry of an asymmetric wedge into a quiescent fluid through particle image velocimetry (PIV). The wedge enters the water surface with an orthogonal velocity falling from a fixed height. We systematically vary the heel angle to elucidate the effect of asymmetric impact on the flow physics and on the fluid-structure interaction. The pressure field in the fluid is reconstructed from PIV data by integrating the Poisson equation. We find that the impact configuration significantly influences both the velocity and the pressure field, ultimately, regulating the hydrodynamic loading on the wedge. Specifically, as the heel angle increases, the location of maximum velocity of the flow moves from the pile-up region to the keel. At the same time, the pressure field significantly decreases in the vicinity of the keel, reaching values smaller than the atmospheric pressure. The spatiotemporal evolution of the hydrodynamic loading is thus controlled by the heel angle, with larger heel angles resulting into more rapid and sustained impacts.

Experiments on the water entry of asymmetric wedges using particle image velocimetry

Slam induced loads on bow-flared sections with various roll angles

A review of some representative floating wave energy converter (WEC) projects in the world, including the wave energy capturing technology, development history, main dimensions and tested sea sites is presented. The design essentials of WEC mooring system are discussed and a mooring system design procedure for WEC is proposed, which includes the introduction of related design codes and mooring analysis methods. In the last part, a comprehensive review of mooring system design in the current WECs projects is conducted. Different mooring systems and mooring materials are introduced and discussed. Based on the discussions, recommendations are made for the suitable mooring design according to the WEC's dimensions and working principles. It is shown that the elastic synthetic rope has great potential in the application of WEC mooring system, and the hybrid mooring system could be a good solution for WEC station keeping problem.

Review of mooring design for floating wave energy converters

Experimental and numerical study of the slamming load on the bow of a chemical tanker in irregular waves

The paper presents an overview of studies of slamming on ship structures. This work focuses on the hull slamming, which is one of the most important types of slamming problems to be considered in the ship design process and the assessment of the ship safety. There are three main research aspects related to the hull slamming phenomenon, a) where and how often a slamming event occurs, b) slamming load prediction and c) structural response due to slamming loads. The approaches used in each aspect are reviewed and commented, together with the presentation of some typical results. The methodology, which combines the seakeeping analysis and slamming load prediction, is discussed for the global analysis of the hull slamming of a ship in waves. Some physical phenomena during the slamming event are discussed also. Recommendations for the future research and developments are made.

Shan Wang

Papers

Numerical study on the water impact of 3D bodies by an explicit finite element method

Slam induced loads on bow-flared sections with various roll angles

Review of mooring design for floating wave energy converters

Experimental and numerical study of the slamming load on the bow of a chemical tanker in irregular waves

Review of ship slamming loads and responses