本文關(guān)鍵詞：基于TLP原理的海上風(fēng)機浮式基礎(chǔ)研究　出處：《江蘇科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 漂浮式風(fēng)機 TLP型浮式基礎(chǔ) 概念設(shè)計 動力響應(yīng) 水動力 結(jié)構(gòu)設(shè)計 載荷預(yù)報 總體強度 試驗方案設(shè)計

【摘要】：海上蘊含豐富的風(fēng)能，海上風(fēng)力發(fā)電為人類提供了大量可再生清潔能源。海上風(fēng)電從淺海的樁柱型向深海的漂浮式發(fā)展是必然趨勢。深海的漂浮式風(fēng)力發(fā)電已成為國外研究的熱點領(lǐng)域，但在我國尚處于起步階段。對海上浮式風(fēng)機而言，浮式基礎(chǔ)結(jié)構(gòu)顯得尤為重要，因此，急需開展海上風(fēng)機浮式基礎(chǔ)的研究。 本文參考IEC-61400-3規(guī)范（國際電工協(xié)會《海上風(fēng)機設(shè)計要求》）及DNV海上浮式平臺相關(guān)規(guī)范，對基于TLP原理的海上風(fēng)機浮式基礎(chǔ)進(jìn)行了概念設(shè)計及相關(guān)力學(xué)性能的系統(tǒng)研究。主要研究內(nèi)容及相關(guān)結(jié)論如下： （1）對基于TLP原理的海上風(fēng)機浮式基礎(chǔ)進(jìn)行了概念設(shè)計。通過對不同平臺型式的特點分析，選定了TLP平臺基礎(chǔ)型式；初步確定了浮式基礎(chǔ)的主尺度。同時對概念設(shè)計的浮式基礎(chǔ)進(jìn)行了穩(wěn)性和運動性能初步計算，通過計算發(fā)現(xiàn)海上張力腿浮式風(fēng)機主要性能指標(biāo)均滿足要求，并對計算結(jié)果進(jìn)行了初步分析。 （2）對海上張力腿浮式風(fēng)機整體結(jié)構(gòu)進(jìn)行了動力響應(yīng)研究。建立了全耦合一體化海上張力腿浮式風(fēng)機整體結(jié)構(gòu)有限元模型并對其進(jìn)行了動態(tài)特性分析，分析發(fā)現(xiàn)浮式風(fēng)機系統(tǒng)的整體結(jié)構(gòu)固有頻率有效的避開風(fēng)輪激勵頻率和主要海浪頻率；選取風(fēng)機正常發(fā)電狀態(tài)下的工況對海上張力腿浮式風(fēng)機在風(fēng)浪流聯(lián)合作用下的動態(tài)響應(yīng)進(jìn)行時域耦合仿真分析，并計算和分析了海上張力腿浮式風(fēng)機在特定風(fēng)浪組合下不同響應(yīng)變量的變化特點；通過不同響應(yīng)變量的譜密度函數(shù)特征比較了不同風(fēng)速、不同波高對浮式風(fēng)機響應(yīng)變量的影響，分析發(fā)現(xiàn)在特定風(fēng)速范圍內(nèi)，風(fēng)載荷對浮式風(fēng)機系統(tǒng)的影響要比波浪載荷大。 （3）對基于TLP原理的海上風(fēng)機浮式基礎(chǔ)進(jìn)行了水動力性能研究。在頻域范圍內(nèi)計算了TLP型浮式基礎(chǔ)的水動力系數(shù)，，得到了一階波浪激勵力和六自由度運動響應(yīng)的RAO；通過對RAO進(jìn)行分析，給出了可能使TLP型浮式基礎(chǔ)處于危險海況的波浪頻率范圍；并研究了張力腿預(yù)張力、張力腿剛度、張力腿長度、張力筋腱根數(shù)等特征參數(shù)對浮式基礎(chǔ)運動響應(yīng)的影響；對TLP型浮式基礎(chǔ)受到的一階波浪激勵力和六自由度運動響應(yīng)分別進(jìn)行了短期和長期預(yù)報。 （4）對基于TLP原理的海上風(fēng)機浮式基礎(chǔ)進(jìn)行了結(jié)構(gòu)設(shè)計。參考DNV海洋平臺規(guī)范，使用載荷抗力分項系數(shù)設(shè)計法選取不同極限狀態(tài)下的載荷系數(shù)，確定了TLP型浮式基礎(chǔ)不同部位的設(shè)計載荷；根據(jù)設(shè)計載荷確定了浮式基礎(chǔ)不同部位的最小設(shè)計板厚以及加強筋和桁材的最小剖面模數(shù)。 （5）對基于TLP原理的海上風(fēng)機浮式基礎(chǔ)進(jìn)行了波浪載荷預(yù)報。建立了詳細(xì)的TLP型浮式基礎(chǔ)波浪載荷計算模型；計算了TLP型浮式基礎(chǔ)典型剖面載荷并得到了各工況下典型剖面載荷分量的傳遞函數(shù)；完成了典型剖面載荷的長期預(yù)報，得到各工況下典型剖面載荷分量的長期統(tǒng)計值，并確定了TLP型浮式基礎(chǔ)總體強度分析所需的設(shè)計波參數(shù)。 （6）對基于TLP原理的海上風(fēng)機浮式基礎(chǔ)進(jìn)行了總體強度分析。建立了TLP型浮式基礎(chǔ)總體強度分析的有限元模型；完成了不同載荷工況下TLP型浮式基礎(chǔ)總體強度計算；對TLP型浮式基礎(chǔ)的總體強度計算結(jié)果進(jìn)行分析并對高應(yīng)力區(qū)進(jìn)行討論，給出了影響TLP型浮式基礎(chǔ)總體強度的關(guān)鍵因素及修改意見。 （7）設(shè)計了海上張力腿浮式風(fēng)機縮尺比試驗?zāi)Ｐ�，進(jìn)行了試驗方案設(shè)計。試驗方案中擬安排主要測量海上張力腿浮式風(fēng)機在風(fēng)浪聯(lián)合作用下的運動響應(yīng)性能，以及風(fēng)載荷的模擬方法對于張力腿浮式風(fēng)機運動響應(yīng)的影響。
[Abstract]:The sea is rich in wind energy, offshore wind power provides a large number of renewable and clean energy for human beings. The floating offshore wind power development from shallow to deep water pile type is an inevitable trend. The floating wind power sea has become a hot research field abroad, but in China is still in its infancy. In terms of floating fan, floating foundation structure is particularly important, therefore, the research of offshore wind turbine floating foundation is urgently needed.
According to the IEC-61400-3 specification (International Electrotechnical Association "requirements for offshore wind turbine design >) and DNV floating platform specification, floating foundation of offshore wind turbines based on TLP principle makes a systematic research on the conceptual design and relevant mechanical properties. The main research contents and conclusions are as follows:
(1) on the conceptual design of floating foundation for offshore wind turbine based on TLP principle. Through the analysis of features of different types of platform, selected the TLP platform foundation; determined the main dimensions of the floating foundation. At the same time floating foundation for the conceptual design of stability and motion can be calculated, found by calculating the offshore tension leg floating wind turbine main performance indexes meet the requirements, and the results are analyzed.
(2) the overall structure of the floating offshore tension leg type fan is studied. A fully coupled dynamic response of integrated offshore tension leg floating wind machine finite element model of the whole structure and has carried on the analysis of dynamic characteristics analysis, found that the overall structure of the fan system inherent floating frequency effectively avoid the excitation frequency of wind wheel and the main wave frequency; selection of fan power under the normal condition analysis of time-domain dynamic coupling simulation of offshore tension leg floating fan in the wind and waves flow under the action of combined response, analyzed the change characteristics of offshore floating wind turbine tension leg in a specific combination of different waves of response variable is calculated and the different wind speed; by comparing the spectral characteristics of different density function of the response variable, different height of floating response variables affect the fan, analysis found in a specific wind speed range, the wind load on the floating wind turbine system The influence is larger than the wave load.
(3) on the floating foundation of offshore wind turbine based on TLP principle is studied. The hydrodynamic coefficients of hydrodynamic performance in frequency domain calculation of TLP type floating foundation, the first-order wave force response and six degree of freedom RAO; through the analysis of RAO wave frequency range is given can make TLP type floating foundation is in danger of the sea; and to study the tension leg tension, tension leg stiffness, tension leg length, the effects of tension tendon root number and other parameters on the response characteristics of floating foundation movement; short-term and long-term prediction of response and six degrees of freedom motion of one wave TLP floating foundation by the excitation force.
(4) to design the structure of floating foundation for offshore wind turbine based on TLP principle. DNV platform specification, using the partial coefficient of load resistance design method to select the load coefficient of different limit state, determine the design load of different parts of TLP type of floating foundation; according to the design load to determine the minimum design in different part of the floating foundation thick and the strengthening of minimum reinforcement and girder section modulus.
(5) on the floating foundation of offshore wind turbine based on TLP principle of wave load forecast model. The TLP type floating foundation wave load established in detail; calculation of TLP type floating foundation of typical section load and the transfer function is given under the condition of typical section load components; completed the long term prediction of typical section load, long-term statistics of typical section load components under different working conditions, and the design wave parameters analysis of TLP type floating foundation to determine the overall strength.
(6) on the floating foundation of offshore wind turbine based on TLP principle of the overall strength analysis. A finite element analysis of TLP type floating foundation for the overall strength of the model; complete the calculation of the overall strength of TLP type floating foundation under different loading conditions; the overall strength of TLP type floating foundation calculation results are analyzed and the high stress area is discussed. The key factors are the impact of type TLP floating foundation overall strength and revisions.
(7) the design of the floating offshore tension leg type fan scale model test, the test scheme was designed. The performance of response in the test program intends to arrange the main measuring offshore tension leg floating fan in the wind and waves of the movement, and the simulation method of wind load influence on the tension leg floating wind turbine movement response.

【學(xué)位授予單位】：江蘇科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU476.1;TM315

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