
Yushun LianHohai University · College of Harbour Coastal and Offshore Engineering
Yushun Lian
Doctor of Philosophy
About
30
Publications
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422
Citations
Introduction
Mooring and Ancor Technology for Ocean Structures;
Wave Energy Converters; Wind Farms; Marine Ranching;
Ocean Structural Dynamics; SOC;Fiber Rope for Space Elevator; Mechanical behaviors of fiber ropes;Xprize Carbon Removal;
https://twitter.com/kelpfarmcareer
Publications
Publications (30)
This study investigates the effects of bedding-in loading history on the mechanical behaviors of aramid, HMPE, and polyester mooring ropes. Bedding-in process led to densification of the rope internal structure and a more uniform fiber alignment, which in turn improved the static stiffness of the ropes. The series of tests showed that bedding-in si...
This paper investigates the residual strength and stiffness evolution characteristics of high-modulus polyethylene (HMPE) ropes used in seaweed farms service. In some cases, polypropylene (PE) ropes commonly used in seaweed farms are more prone to failure in severe marine conditions, and HMPE ropes may be a more suitable alternative. Normally, dama...
Offshore floating photovoltaic (OFPV) platforms have emerged as a new development trend. However, conventional floating photovoltaic platforms designed for inland water areas are not suitable for use directly in ocean environments. Hence, an OFPV platform incorporating three types of mooring systems is proposed. These mooring systems employ various...
As global demand for sustainable biomass and need to mitigate global warming begin to rise, cultivation of seaweed has gained significant attention in recent years due to its potential for carbon recycling. However, limited availability of suitable coastal areas for large-scale seaweed cultivation has led to exploration of offshore environments as...
As global demand for sustainable biomass and need to mitigate global warming begin to rise, cultivation of seaweed has gained significant attention in recent years due to its potential for carbon recycling. However, limited availability of suitable coastal areas for large-scale seaweed cultivation has led to exploration of offshore environments as...
The influence of mooring systems with lines of different material on the dynamic response of a floating wind turbine is studied using a 5 MW OC4-DeepCwind semi-submersible wind turbine as a representative prototype in this study. Two types of mooring systems were designed using the MoorDyn module in OpenFAST software (v3.1.0): one uses chains, and...
In recent years, high modulus polyethylene (HMPE) fiber slings have been increasingly used in marine transportation and installation projects due to their numerous advantages including lighter than steel ropes, easily handling operation, and no fish hooks et al. Due to the complex behavior of fiber ropes, an effective bedding-in method is necessary...
As the market demand for seaweed products increases rapidly over the last few decades, farming of seaweed has become one of the most economical and environmentally friendly marine operations in aquaculture. Seaweed cultivation areas are primarily concentrated nearshore at present. However, with the expansion of aquaculture facilities, rapid coastal...
Methods for carbon sequestration are warranted to tackle climate change caused by greenhouse gases released from anthropogenic activities. Seaweed is a type of marine plant that utilizes carbon dioxide for photosynthesis and has a substantial capacity to sequestrate carbon. Despite the huge potential, the long-lasting carbon sequestration (LLCS) of...
Polyester ropes have been widely used in various ocean engineering. In practice, the occurrence of damage degrades polyester rope strength and causes mooring rope failure. To ensure operational safety of polyester mooring ropes, an experimental method and associated procedure for investigating the residual strength of damaged ropes are proposed. Th...
Granular-continuum interfaces commonly exist in geotechnical engineering practices, such as foundations, reinforcements, and soil nailing. The mechanical behaviors and fabric of the interface are not only influenced by the soil properties but the interfaces, and normal stresses. Therefore, a thorough understanding of the granular-continuum interfac...
In this study, effects of damage levels of fiber ropes on the performance of a hybrid taut-wire mooring system are investigated. The analysis is performed using a numerical FPSO (Floating Production Storage and Offloading) model with a hybrid mooring system installed in 3000m of water depth. An in-depth study was conducted using the numerical model...
To improve the understanding of the damping behavior of fiber ropes, a novel method for calculating the internal damping coefficient of these ropes based on the theory of structural dynamics (TSD)is proposed. By comparing the damping values from the ‘indicator diagram’ method (IDM)utilizing experimental data of aramid, polyester and HMPE ropes, the...
This article describes the model development and preliminary progress of an ongoing research study on the effects of nonlinearities in ocean wave input and power-takeoff (PTO) control on wave energy conversion system dynamics and efficiency. The model system employed and progress on recent developments are: (1) nonlinear wave modeling in the ocean,...
The bedding-in process of synthetic fiber ropes such as polyester, nylon, aramid and HMPE is of vital importance to experimental research and engineering application. In the present work, several important topics are systematically investigated by utilizing an experimental setup for cyclic loading tests of synthetic fiber ropes. These topics includ...
Creep tests of high modulus polyethylene (HMPE) samples are performed to obtain the corresponding creep and creep-rupture curves. The results show that the secondary creep stage is especially pronounced, and its creep rate is nearly constant. Based on this fact, the creep rate at the secondary stage has been utilized as the representative value of...
With offshore oil and gas exploration moving into deeper waters, HMPE (high modulus polyethylene) ropes have been widely investigated. However, the tension-tension fatigue behavior of HMPE ropes, especially the effect of mean load on the fatigue life of HMPE ropes, is still lack of sufficient and quantitative understanding. Therefore, to capture th...
To understand the evolution of dynamic stiffness of damaged synthetic fiber mooring ropes, experimental investigations of polyester and high modulus polyethylene (HMPE) ropes are systematically performed utilizing a specially designed experimental system. An experimental procedure is proposed and test results show that the dynamic stiffness increas...
The synthetic fiber ropes such as polyester, aramid and high modulus polyethylene (HMPE) are increasing applied to deepwater mooring systems for oil and gas exploitation. Due to that mooring ropes generally bear tensions for a long period, synthetic fiber ropes that are composed of the viscoelastic material would present creep behaviors and even th...
As offshore oil and gas exploration moves into deeper water regions, taut-wire mooring systems have become attractive as alternatives for catenary mooring systems due to theirs excellent properties such as higher mooring stiffness, smaller footprint and higher platform payload. Polyester ropes are commonly applied to the deepwater taut-wire mooring...