Browsing NTNU Open by Author "Cheng, Zhengshun"
Now showing items 1-20 of 34
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A comparative study on dynamic responses of spar-type floating horizontal and vertical axis wind turbines
Cheng, Zhengshun; Wang, Kai; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2017)Interest in the exploitation of offshore wind resources using floating wind turbines has increased. Commercial development of floating horizontal axis wind turbines (FHAWTs) is emerging because of their commercial success ... -
A comparison of extreme structural responses and fatigue damage of semi-submersible type floating horizontal and vertical axis wind turbines
Cheng, Zhengshun; Madsen, Helge Aagard; Chai, Wei; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2017)Currently development of floating wind turbines for deep water is mainly based on horizontal axis wind turbines (HAWTs). However, floating vertical axis wind turbines (VAWTs) are possible alternative due to their potential ... -
A comparison of two fully coupled codes for integrated dynamic analysis of floating vertical axis wind turbines
Koppenol, Boy; Cheng, Zhengshun; Gao, Zhen; Ferreira, Carlos Simão; Moan, Torgeir (Journal article; Peer reviewed, 2017)This paper presents a comparison of two state-of-the-art codes that are capable of modelling floating vertical axis wind turbines (VAWTs) in fully coupled time-domain simulations, being the HAWC2 by DTU and the SIMO-RIFLEX-AC ... -
A fully coupled method for numerical modeling and dynamic analysis of floating vertical axis wind turbines
Cheng, Zhengshun; Madsen, Helge A.; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2017)Offshore wind energy is one of the most promising renewable energy resources and an increasing interest arises to develop floating vertical axis wind turbines (VAWTs), which have the potential to reduce the cost of energy. ... -
A global slamming force model for offshore wind jacket structures
Tu, Ying; Cheng, Zhengshun; Muskulus, Michael (Journal article; Peer reviewed, 2018)Under certain harsh environmental conditions, jacket structures supporting offshore wind turbines might be exposed to plunging breaking waves, causing slamming forces that affect the structural integrity and fatigue life. ... -
A review of slamming load application to offshore wind turbines from an integrated perspective
Tu, Ying; Cheng, Zhengshun; Muskulus, Michael (Journal article; Peer reviewed, 2017)In harsh sea conditions, it is possible for offshore wind turbines (OWTs) to be exposed to slamming loads due to breaking waves, especially plunging breaking waves. These slamming loads lead to significant structural ... -
Aerodynamic Modeling of Offshore Vertical Axis Wind Turbines using the Actuator Cylinder Method
Cheng, Zhengshun; Madsen, Helge A.; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2016)Recently the interest in developing vertical axis wind turbines (VAWTs) for offshore application has been increasing. Among the aerodynamic models of VAWTs, double multi-streamtube (DMST) and actuator cylinder (AC) models ... -
An Integrated Dynamic Analysis Method for Simulating Installation of a Single Blade for Wind Turbines
Zhao, Yuna; Cheng, Zhengshun; Sandvik, Peter Christian; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2018)Installation of blades for wind turbines is challenging due to large lifting height and high precision. Assessment of blade dynamic responses during installation needs advanced simulation tools which are limited at present. ... -
Analysis of a Hybrid Mooring System Concept for a Semi-Submersible Wind Turbine in Intermediate Water Depth Under Operational, Extreme, and Yaw Error Conditions
Cao, Qun; Bachynski-Polic, Erin Elizabeth; Gao, Zhen; Xiao, Longfei; Cheng, Zhengshun; Liu, Mingyue (Chapter, 2022)A hybrid mooring system consisting of catenary chains and a series of clump weights was designed for the intermediate water depth, for a floating semi-submersible wind turbine. The use of multiple clump weights in the ... -
Assessment of inhomogeneity in environmental conditions in a Norwegian fjord for design of floating bridges
Cheng, Zhengshun; Svangstu, Erik; Moan, Torgeir; Gao, Zhen (Peer reviewed; Journal article, 2021)Environmental conditions along a very large floating bridge are inhomogeneous due to complex topography and hydrography. Evaluating the inhomogeneity in environment conditions is important for safety design of floating ... -
Assessment of performance enhancement of a semi-submersible vertical axis wind turbine with an optimized Darrieus rotor
Cheng, Zhengshun; Wang, Kai; Ong, Muk Chen (Journal article; Peer reviewed, 2018)Increasing efforts are currently being devoted to develop floating vertical axis wind turbines (VAWTs), due to their potential to reduce the cost-of-energy. Optimization of rotors is favorable to increase the power capture ... -
Detection of plunging breaking waves based on machine learning
Tu, Ying; Cheng, Zhengshun; Muskulus, Michael (Chapter, 2018)Plunging breaking waves that occur in the vicinity of offshore structures can lead to high impulsive slamming loads, which are significant for the structural loading. The occurrence of plunging breaking waves is usually ... -
Dynamic Modelling and Analysis of Three Floating Wind Turbine Concepts with Vertical Axis Rotor
Cheng, Zhengshun; Wang, Kai; Gao, Zhen; Moan, Torgeir (Proceedings of the twenty-fifth International Ocean and Polar Engineering Conference;ISOPE 2015, Chapter, 2015)Recently there is an increasing interest in the development of offshore floating vertical axis wind turbines (FVAWTs). A FVAWT mounted on a semi-submersible has been proposed by several researchers, and a FVAWT with a spar ... -
Dynamic Response Analysis of a Floating Bridge Subjected to Environmental Loads
Cheng, Zhengshun; Gao, Zhen; Moan, Torgeir (Chapter, 2018)Designing floating bridges for wide and deep fjords is very challenging. The floating bridge is subjected to wind, wave, and current loads. All these loads and corresponding load effects should be properly evaluated, e.g. ... -
Dynamic response analysis of floating wind turbines with emphasis on vertical axis rotors
Cheng, Zhengshun; Moan, Torgeir; Gao, Zhen (Chapter; Peer reviewed, 2016)Large floating wind turbines are feasible for offshore application. Due to the commercial success onshore and nearshore, floating horizontal axis wind turbines (HAWTs) are now being widely studied. However, floating vertical ... -
Dynamic Response Analysis of Three Floating Wind Turbine Concepts with a Two-Bladed Darrieus Rotor
Cheng, Zhengshun; Wang, Kai; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2015)Recently, interest in the development of floating vertical axis wind turbines (FVAWTs) has been increasing, since FVAWTs might prove to be one of the optimal configurations in deep waters. In this study, a FVAWT with a 5 ... -
Effect of Damping on the Dynamic Responses of a Floating Bridge in Wind and Waves
Hong, Sunghun; Cheng, Zhengshun; Gao, Zhen; Shao, Yanlin; Xiang, Xu (Chapter, 2020)The E39 Coastal Highway Route Project is being developed to reduce the travel time between Trondheim and Kristiansand in Norway and several ferry connections are planned to be replaced by floating bridges or submerged ... -
Effect of the number of blades on the dynamics of floating straight-bladed vertical axis wind turbines
Cheng, Zhengshun; Madsen, Helge Aagard; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2017)Floating vertical axis wind turbines (VAWTs) are promising solutions for exploiting the wind energy resource in deep waters due to their potential cost-of-energy reduction. The number of blades is one of the main concerns ... -
Experimental and numerical analysis of wind field effects on the dynamic responses of the 10 MW SPIC floating wind turbine concept
Cao, Qun; Bachynski-Polic, Erin Elizabeth; Gao, Zhen; Xiao, Longfei; Cheng, Zhengshun; Liu, Mingyue (Journal article; Peer reviewed, 2022) -
Extreme responses and associated uncertainties for a long end-anchored floating bridge
Cheng, Zhengshun; Gao, Zhen; Moan, Torgeir (Peer reviewed; Journal article, 2020)Very-long floating bridges represent an innovative marine structure for crossing wide and deep fjords. During the design of a floating bridge, extreme structural responses at a specified probability of exceedance are ...