scholarly journals Stochastic Dynamic Response Analysis of a 10 MW Tension Leg Platform Floating Horizontal Axis Wind Turbine

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3341 ◽  
Author(s):  
Tao Luo ◽  
De Tian ◽  
Ruoyu Wang ◽  
Caicai Liao
Keyword(s):  
Dynamic Response ◽  
Horizontal Axis ◽  
Viscous Drag ◽  
Response Analysis ◽  
Stochastic Dynamic ◽  
Mooring System ◽  
Wave Load ◽  
Tension Leg Platform ◽  
Horizontal Axis Wind Turbine ◽  
Resonant Amplitude

The dynamic response of floating horizontal axis wind turbines (FHWATs) are affected by the viscous and inertia effects. In free decay motion, viscous drag reduces the amplitude of pitch and roll fluctuation, the quasi-static mooring system overestimates the resonant amplitude values of pitch and roll. In this paper, the quasi-static mooring system is modified by introducing linear damping and quadratic damping. The dynamic response characteristics of the FHAWT modified model of the DTU 10 MW tension leg platform (TLP) were studied. Dynamic response of the blade was mainly caused by wind load, while the wave increased the blade short-term damage equivalent load. The tower base bending moment was affected by inclination of the tower and the misaligned angle βwave between wind and wave. Except the yaw motion, other degrees of freedom motions of the TLP were substantially affected by βwave. Ultimate tension of the mooring system was related to the displacement caused by pitch and roll motions, and standard deviation of the tension was significantly affected by the wave frequency response. Under the action of wave load, the viscous drag would stimulate the mooring system and increase the resonance of the platform motion.

scholarly journals Dynamic Response Analysis of the Rotating Blade of Horizontal Axis Wind Turbine

2010 ◽  
Vol 34 (5) ◽  
pp. 543-559 ◽  
Author(s):  
Liu Xiong ◽  
Zhang Xianmin ◽  
Li Gangqiang ◽  
Chen Yan ◽  
Ye Zhiquan
Keyword(s):  
Dynamic Response ◽  
Wind Turbine ◽  
Horizontal Axis ◽  
Response Analysis ◽  
Horizontal Axis Wind Turbine ◽  
Dynamic Response Analysis ◽  
Rotating Blade

An innovative mooring system for floating storage tanks and stochastic dynamic response analysis

2018 ◽  
Vol 170 ◽  
pp. 361-373 ◽  
Author(s):  
Ling Wan ◽  
Chi Zhang ◽  
Allan Ross Magee ◽  
Jingzhe Jin ◽  
Mengmeng Han ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Response Analysis ◽  
Stochastic Dynamic ◽  
Mooring System ◽  
Storage Tanks ◽  
Dynamic Response Analysis

Model Identification and Operating Load Characterization for a Small Horizontal Axis Wind Turbine Rotor Using Integrated Blade Sensors

2010 ◽  
Author(s):  
Scott Dana ◽  
Joseph Yutzy ◽  
Douglas E. Adams
Keyword(s):  
Dynamic Response ◽  
Wind Turbine ◽  
Rotor Blade ◽  
Model Identification ◽  
Turbine Rotor ◽  
Forced Response ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine ◽  
And Control ◽  
Wind Turbine Rotor

One of the primary challenges in diagnostic health monitoring and control of wind turbines is compensating for the variable nature of wind loads. Given the sometimes large variations in wind speed, direction, and other operational variables (like wind shear), this paper proposes a data-driven, online rotor model identification approach. A 2 m diameter horizontal axis wind turbine rotor is first tested using experimental modal analysis techniques. Through the use of the Complex Mode Indication Function, the dominant natural frequencies and mode shapes of dynamic response of the rotor are estimated (including repeated and pseudo-repeated roots). The free dynamic response properties of the stationary rotor are compared to the forced response of the operational rotor while it is being subjected to wind and rotordynamic loads. It is demonstrated that both narrowband (rotordynamic) and broadband (wind driven) responses are amplified near resonant frequencies of the rotor. Blade loads in the flap direction of the rotor are also estimated through matrix inversion for a simulated set of rotor blade input forces and for the operational loading state of the wind turbine in a steady state condition. The analytical estimates are shown to be accurate at frequencies for which the ordinary coherence functions are near unity. The loads in operation are shown to be largest at points mid-way along the span of the blade and on one of the three blades suggesting this method could be used for usage monitoring. Based on these results, it is proposed that a measurement of upstream wind velocity will provide enhanced models for diagnostics and control by providing a leading indicator of disturbances in the loads.

Experimental and Numerical Study on Dynamic Response of FSRU-LNGC Side-by-Side Mooring System

2019 ◽  
Author(s):  
Jingxia Yue ◽  
Weili Kang ◽  
Wengang Mao ◽  
Pengfei Chen ◽  
Xi Wang
Keyword(s):  
Numerical Analysis ◽  
Dynamic Response ◽  
Numerical Study ◽  
Clean Energy ◽  
Coupled Analysis ◽  
Response Analysis ◽  
Mooring System ◽  
Test Results ◽  
Floating Bodies ◽  
Damping Parameter

Abstract Floating Storage and Regasification Unit (FSRU) becomes one of the most popular equipment in the industry for providing clean energy due to its technical, economic and environmental features. Under the combined loads from wind, wave and current, it is difficult for the prediction of the dynamic response for such FSRU-LNGC (Liquified Natural Gas Carrier) side-by-side mooring system, because of the complicated hydrodynamic interaction between the two floating bodies. In this paper, a non-dimensional damping parameter of the two floating bodies is obtained from a scaled model test. Then the numerical analysis is carried out based on the test results, and the damping lid method is applied to simulate the hydrodynamic interference between floating bodies. The dynamic response of the side-by-side mooring system including six degrees of freedom motion, cable tension and fender force are provided and analyzed. According to the comparisons between numerical results and the test results, it is shown that the proposed coupled analysis model is reliable, and the numerical analysis can properly describe the dynamic response of the multi-floating mooring system in the marine environment. Moreover, the non-dimensional damping parameter which is used in numerical analysis can act as a good reference to the dynamic response analysis of similar multi-floating mooring systems.

scholarly journals Stochastic Response of Tension Leg Platform to Wave and Current Forces

1989 ◽  
Vol 111 (4) ◽  
pp. 221-230 ◽  
Author(s):  
A. Ertas ◽  
J.-H. Lee
Keyword(s):  
Constant Current ◽  
Response Analysis ◽  
Stochastic Dynamic ◽  
Superposition Method ◽  
Random Waves ◽  
Stochastic Response ◽  
Tension Leg Platform ◽  
Single Degree Of Freedom ◽  
Simulation Techniques ◽  
Wave Induced

The linear analysis in the frequency domain is presented for the surge motion of a tension leg platform (TLP) in the case of random waves only and random waves with constant current. A single-degree-of-freedom model of a TLP is employed for response. The superposition method, one of the simulation techniques, is applied to random sea wave, and the response analysis of TLP in time is developed with wave velocity and wave acceleration simulations. Wave-induced forces are calculated using the modified Morison equation, which takes into account relative motion. Computational methods for both analyses are developed, and the results of stochastic, dynamic response of the TLP, with and without the presence of current, are presented and compared.

Dynamic response analysis of a floating mooring system

2014 ◽  
Vol 13 (3) ◽  
pp. 381-389 ◽  
Author(s):  
Conghuan Le ◽  
Hongyan Ding ◽  
Puyang Zhang
Keyword(s):  
Dynamic Response ◽  
Response Analysis ◽  
Mooring System ◽  
Dynamic Response Analysis

Dynamic response analysis of a small-scale model tension leg platform

1992 ◽  
Vol 5 (6) ◽  
pp. 491-513 ◽  
Author(s):  
Ney Roitman ◽  
Ricardo F.M. Andrade ◽  
Ronaldo C. Batista
Keyword(s):  
Dynamic Response ◽  
Scale Model ◽  
Small Scale ◽  
Response Analysis ◽  
Tension Leg Platform ◽  
Dynamic Response Analysis ◽  
Small Scale Model
Sign in / Sign up

Export Citation Format

Share Document