本文選題：海上風(fēng)機(jī) + 波浪荷載��； 參考：《重慶交通大學(xué)》2014年碩士論文

【摘要】：本文依托教育部博士點(diǎn)基金項(xiàng)目（編號(hào)：20125522110004）和重慶市自然科學(xué)基金重點(diǎn)項(xiàng)目（編號(hào)：cstc2013jjB3002），以江蘇省如東縣近海及潮間帶風(fēng)電場建設(shè)項(xiàng)目為工程背景，采用數(shù)值模擬與理論分析相結(jié)合的手段，對(duì)周期性波浪荷載作用下的海上風(fēng)機(jī)基礎(chǔ)與上部結(jié)構(gòu)動(dòng)力響應(yīng)進(jìn)行了系統(tǒng)地研究，，主要研究內(nèi)容及成果如下： （1）通過對(duì)實(shí)際工程資料的搜集與整理，包括如東縣近海的海洋環(huán)境資料、海洋地質(zhì)資料以及風(fēng)機(jī)設(shè)計(jì)資料，對(duì)海上風(fēng)機(jī)的結(jié)構(gòu)型式與受荷情況獲得了深入的了解與認(rèn)識(shí)。 （2）從海上波浪的運(yùn)動(dòng)特性入手，對(duì)目前發(fā)展較為成熟的經(jīng)典波浪理論以及求解波浪力的Morison方程進(jìn)行了分析和探討，選用非線性Stokes五階波理論建立了波浪運(yùn)動(dòng)的數(shù)值模型，并計(jì)算了單樁式海上風(fēng)機(jī)基礎(chǔ)所承受的波浪荷載。 （3）根據(jù)工程區(qū)域的地質(zhì)資料，選用p y曲線法，對(duì)海上風(fēng)機(jī)樁基撓曲變形與地基土壤的土抗力的之間關(guān)系進(jìn)行了分析與計(jì)算。以此為依據(jù)，建立了地基土體的非線彈性本構(gòu)模型。 （4）將海上風(fēng)機(jī)的具體結(jié)構(gòu)與實(shí)際受荷情況作了合理的簡化，以ANSYS軟件為平臺(tái)，利用其參數(shù)化設(shè)計(jì)語言APDL，建立了單樁式以及三樁式的海上風(fēng)機(jī)基礎(chǔ)與上部結(jié)構(gòu)的三維有限元概化模型（FEM）。 （5）考慮波浪荷載的周期性作用，計(jì)算分析了單樁式以及三樁式海上風(fēng)機(jī)基礎(chǔ)與上部結(jié)構(gòu)的模態(tài)振型，確定了結(jié)構(gòu)整體的振動(dòng)特性。進(jìn)一步對(duì)這兩種型式的海上風(fēng)機(jī)基礎(chǔ)與上部結(jié)構(gòu)進(jìn)行了瞬態(tài)分析，得到了結(jié)構(gòu)關(guān)鍵部位的位移、應(yīng)力等動(dòng)力響應(yīng)時(shí)程曲線。并結(jié)合擬靜力法將波浪荷載簡化為靜力荷載，對(duì)其作了擬靜力反應(yīng)分析。 （6）以單樁式海上風(fēng)機(jī)基礎(chǔ)與上部結(jié)構(gòu)的模型為基礎(chǔ)，對(duì)結(jié)構(gòu)關(guān)鍵部位的動(dòng)剛度進(jìn)行了分析，得出了結(jié)構(gòu)關(guān)鍵部位的動(dòng)剛度隨波浪荷載頻率的變化曲線。并依據(jù)動(dòng)剛度曲線表現(xiàn)的結(jié)構(gòu)特性，對(duì)單樁式海上風(fēng)機(jī)的設(shè)計(jì)提出了一些設(shè)計(jì)建議。
[Abstract]:This paper relies on the doctorate fund project of the Ministry of Education (No.: 20125522110004) and the key project of Chongqing Natural Science Foundation (No. 10: cstc2013jjB3002C), taking the construction project of wind farm in the coastal and intertidal zone of Rudong County, Jiangsu Province, as the engineering background. The dynamic response of offshore fan foundation and superstructure under periodic wave loads is studied systematically by means of numerical simulation and theoretical analysis. The main research contents and results are as follows: 1) through the collection and collation of practical engineering data, including marine environment data, marine geological data and fan design data of Rudong County, The structure type and loading situation of offshore fan are deeply understood and understood. (2) starting with the motion characteristics of sea wave, The classical wave theory and the Morison equation for wave force are analyzed and discussed. The nonlinear Stokes fifth order wave theory is used to establish the numerical model of wave motion. The wave load on the foundation of single pile offshore fan is calculated. According to the geological data of the engineering area, the p y curve method is selected. The relationship between flexural deformation of offshore fan pile foundation and soil resistance of foundation soil is analyzed and calculated. Based on this, the nonlinear elastic constitutive model of foundation soil is established. (4) the concrete structure of offshore fan and the actual loading condition are reasonably simplified, and the ANSYS software is used as the platform. Using the parametric design language APDL, a three-dimensional finite element generalized model of the foundation and superstructure of offshore fan with single pile and three piles is established. The periodic action of wave load is considered. The modal modes of the foundation and superstructure of single-pile and three-pile offshore fan are calculated and analyzed, and the vibration characteristics of the whole structure are determined. Furthermore, the transient analysis of the foundation and superstructure of the two types of offshore fan is carried out, and the dynamic response time history curves of the key parts of the structure, such as displacement and stress, are obtained. Combined with the pseudo-static method, the wave load is simplified to static load, and the quasi-static response analysis is made. (6) based on the model of the foundation and superstructure of the single pile offshore fan, the dynamic stiffness of the key parts of the structure is analyzed. The dynamic stiffness curves of the key parts of the structure with the wave load frequency are obtained. According to the structural characteristics of the dynamic stiffness curve, some design suggestions for the single pile offshore fan are put forward.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU476;TU311.3

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